Your voice, not a robot's
It learns how you write to each person (the emoji with your sister, the polish with a client) and drafts in that voice, in their language.
One inbox for WhatsApp, Instagram, Telegram and SMS
Every chat. One inbox. Only on your phone.
Four apps. Hundreds of chats. Everyone who's waiting on you, in one calm list, on the phone in your pocket, where every message stays, sealed. Kadabox helps you answer. It never answers for you.
- 01 / 03
Every chat. One list.
WhatsApp, Instagram, Telegram and SMS side by side, each with a line that says what they want.
- 02 / 03
Who's waiting, one card at a time.
The Inbox walks you through everyone you owe an answer. Reply, done, next.
- 03 / 03
Their language. Your voice.
Read Sofía's Spanish in English, answer in Spanish, the way you'd say it.
Don't take our word for it. Take it for a spin.
This is Kadabox's inbox running right here, in your browser, the app's own screens, as a computer and as a phone. Read Sofía's Spanish in English, ask for reply ideas, send one (and undo it), clear the Inbox, like a reel. The people are invented and nothing leaves this page.
4networks, one list
0messages on our servers
3reply ideas, in your voice
3.5 sto take back any send
Four apps. One calm list. Nobody forgotten.
Kadabox puts every conversation from WhatsApp, Instagram, Telegram and SMS in one list, and then does the part the apps never did: it tells you who's waiting, what they want, and walks you through them one by one.
Everyone waiting on you, one card at a time.
Kadabox knows who's waiting, the friend who asked a question, the group that mentioned you, the client from yesterday. Press start and go through them like a deck: reply, mark done, snooze, next. Until nobody is left.
- A one-line gist on every card, so you know before you read
- Reply ideas already open, and the next card ready before you get there
- Queues for work, family or anything you like, up to twelve
- Read in peace, Kadabox never sends read receipts for you
2 of 6Skip · Done · Snooze
🎉 Inbox zero6 answered · 2 snoozed
Know where to start before you open a chat.
One line on top says what matters most. Under each chat that's waiting, a short note says what they want, the concert on Saturday, the call on Monday, dessert for Sunday lunch. No priority labels, no red flags: just what's pressing, in words.
- Made when you ask, or on a timer you choose
- One chat's note with a swipe, any chat, any time
- Catch me up: a long group in five lines
✦ Sofía's concert, Kenji's Monday call and Sunday lunch need you first.
A link shows what it is.
Someone sends an Amazon, AliExpress, Temu or Shein link and you see the product: its photos to swipe through, the price and the discount, the rating and what it is. A pinned place arrives as a map with its name and address, Directions one tap away. Photos sent one after another sit in one row you swipe sideways.
- Product cards for the big shops, Mercado Livre, eBay and more
- Maps with Directions, Google Maps, Apple Maps and Waze
- Albums that keep a chat tidy, each photo still its own
- Your phone reads the link itself and keeps the card, nothing else leaves it
A list, sections or a board.
Group your chats by what needs you, by app, by who they are (family, friends, work) or by language. Drag a card to Done. Press ▶ on a column to answer everyone in it.
Your chats, sorted your way.
Make a tag for anything (Work, Family, the trip to Lisbon) and gather chats from every app under it. Pick them one by one, or let a tag take every group, every WhatsApp chat or everyone Kadabox knows as family. Each tag becomes a chip over your chats, a tab of its own and a coloured label under its rows.
- WhatsApp, Instagram, Telegram and SMS chats side by side in one tag
- By hand or by rule, an Unread-only tag in two taps
- A tab on your phone, each tag in the browser's rail
- Group the board by tag, or send an Inbox queue through one
Write it now. Send it when it lands best.
Hold the send button and pick a time: your phone sends it then, once, or every week for the Monday stand-up. Set a reminder on any message and the chat comes back to your Inbox when it's due. On a birthday, it's waiting for you on top of your chats with ideas for a warm message. And the texts you send often are a “/” away.
- Scheduled and repeating messages, send now, edit or reschedule any time
- Reminders on a message or a whole chat, with a notification on your phone
- Birthdays from what people tell you, or what you add to their memory
- Saved replies that fill in their name, always yours to send
An assistant in every chat. It never speaks for you.
Kadabox reads the conversation you're in and helps: drafts in your voice, translation both ways, voice notes you can read, the gist of a long group, what you promised and when. It fills your message box, you decide what goes out.
Nothing sends itself
Ideas, translations, rewrites and dictation only ever fill your box or a tray. Every message leaves on your tap, with seconds to undo.
It runs where you choose
On your phone for free, with your own key at cost, or with Kadabox credits. Everything it does by itself has its own switch.
Three ways to answer, written the way you write.
Open a chat and three drafts are waiting, in their language, with what each one means in yours. Two keep the conversation going: a callback, a tease, a plan, a question worth answering. The third simply answers and lets it rest.
- Pick an intent (Yes, No, Later, Ask, Plan, Thanks, Joke, Care, Wrap up) and the drafts follow. Make chips of your own.
- Or just say it:
yes, but Saturday instead
. - Point at one message and get ideas for that one.
- Quick replies for one-tap answers, and ghost text as you type, Tab takes it.
S
Sofía Martínez
Shall we go to Saturday's concert? I've got two tickets and my sister can't make it 🎶
🇪🇸 Translated · See original
✦3 reply ideas✍️ My style📚 Books
She has a spare ticket for Saturday and is hoping you'll say yes.
✨ Excited yes keeps it going¡Sí, me apunto! 🎶 ¿Cenamos algo antes? Conozco un sitio de tapas cerca.🇬🇧 Yes, I'm in! 🎶 Dinner before? I know a tapas place nearby.
😂 Playful callback keeps it going¿Después de lo de Lisboa? Solo si esta vez no perdemos el último metro 😂🇬🇧 After Lisbon? Only if we don't miss the last metro this time 😂
🙂 Simple yes just answers¡Claro que sí! Gracias por pensar en mí.🇬🇧 Of course! Thanks for thinking of me.
Tell Kadabox what to say… e.g. “yes, but Saturday instead”
Every idea you send teaches the next ones.
When you send one of its drafts (as it was, or after editing) Kadabox notes the shape of what you did: which draft you chose, how much you trimmed, the emoji you took out. Never the words. After a handful of sends, new drafts come out closer to what you'd have written yourself, per person, once there's enough to go on.
Ideas that know a thing or two.
Turn on a strategy and each draft leans on a different technique, from the classics on making friends and persuading people, written up in our own words, or from any book you upload. Every draft says which technique it used, and why it fits.
- Upload EPUB, PDF, Word or text: Kadabox studies the whole book and turns it into techniques you can read, edit and switch off, with the cost shown first.
- Reference books and websites keep the facts straight: passages are found on your phone and quoted.
- With 🔎 on, it looks things up on Wikipedia or the web, with two short queries, names, numbers and links stripped out. Never your chat.
- Keep it honest, on by default, leaves the manipulative techniques out.
Read in yours. Answer in theirs.
Messages in other languages arrive already translated, with the original one tap away. When you reply, Kadabox writes it in their language and the tone you use with them, warm with friends, polished with clients. In a group, it translates only the people who need it.
- Spanish, Japanese, French, Portuguese and twenty more by name and flag, and whatever else your AI model reads
- Their language, country and the language to answer in, picked up from the chat itself, detected on your phone, no AI needed
- Correct a translation by hand; turn it on for one person, one chat, or everyone
What they wrote · Español
¿Vamos al concierto del sábado?
↓
Shall we go to Saturday's concert?
Whatever they write, you read it in yours.
Tap a flag: the same message arrives in their language, Kadabox shows it to you in yours, and your answer goes back in theirs.
What they wrote · Español¿Vamos al concierto del sábado? Tengo dos entradas 🎶
Shall we go to the concert on Saturday? I've got two tickets 🎶🇪🇸 Translated · See original
¡Sí, me apunto! ¿A qué hora empieza?Sent in Español · means "Yes, I'm in! What time does it start?"
Voice notes you can read. Messages you can speak.
Every voice note that arrives is written down as it comes in and tidied up (punctuation, paragraphs, no ums) then translated when the chat needs it. Read it in a meeting, search it next week. And when typing is a chore, hold the mic and talk: Kadabox writes it up as clean messages, splits the long ones, puts them in their language and waits for you.
- Transcribed on your phone by its own model, or by the speech service you choose
- Small voice packs per language, downloaded to your phone next to the model: quick, offline, private
- Fix a word in a transcript and the translation follows
- Send what you said as text, or as a voice note, your call
It remembers people: the way you would.
Who they are to you, what you talk about, how they write and how you write back. Kadabox keeps a small memory of every person, built from your chats on your phone, so ideas sound right for them. Every line is yours to correct, and it keeps your corrections.
- One person on WhatsApp and Instagram? Link them: one memory, one history.
- Your own notes about someone, the AI reads them, never rewrites them.
- How you write: your laugh, your emoji, your openers, per language, so drafts sound like you, not like an assistant.
Thirty messages. Five lines.
Long groups, unfamiliar idioms, promises buried in last week, Kadabox has a tool for each, a tap away in every chat.
Catch me up
A busy group while you were out? Five lines: who said what, what got decided, what's left for you.
Ask this chat
Ask a conversation a question in plain words. The answer comes with the messages it came from.
Ask all your chats
One question across every conversation on every network, the AI search your phones never had.
To-dos and dates
What you promised, what they asked, the plans and the dates, pulled out of the chat and tickable.
Explain
An idiom, a tone, a cultural nuance: what they really mean, and what they want from you.
Make it easier
A wall of text becomes a summary, key points, plain words or a checklist you can tick, right under the message.
sure i can come saturday, what time
Sure, I can come on Saturday, what time works?
Rewrite
Twelve ways to rework a draft, or say how: sound less needy
. And check how it'll land before you send.
Autocomplete
Your sentence, finished in your words as you type. Tab takes it; the next key ignores it.
The brief
One line over your whole list and a short note under every chat that's waiting, before you open a single one.
Your phone, your key, or ours.
Pick per task. Mix them. Change your mind any time, nothing about your chats changes.
On your phone
A Gemma model, downloaded once, on Wi-Fi while your phone charges. It translates, autocompletes, rewrites, summarizes and transcribes voice notes without a word leaving your phone.
- Taps go first; heavy work waits for the charger
- Learns which jobs it does well, and hands the rest to your cloud model
- No cloud model at all? It does everything that fits a phone
Your own key
OpenRouter, OpenCode Go or any OpenAI-compatible service. Calls go straight from your phone to the provider, the key never leaves your phone, and we never see the text.
- A model per task: the best for ideas, the cheapest for translation
- How long it thinks, per task, fitted to what each model can do
- Suggestions from the live catalogue, newest, cheapest, most capable, free
- What each model cost you, and what a month will
Kadabox credits
AI included in your plan, no keys, no setup. Routed only to providers set to keep nothing, and we never log what's sent. Top up any time.
- Lets the AI work ahead: ideas ready, memory fresh, the brief on time
- Your own key and the phone's model still work beside it
- Usage you can see, per feature
No AI behind your back.
AI runs when you tap, or in the background jobs you switched on, each one on the page of the feature it serves and all of them listed together under What runs by itself.
- All 24 instructions the AI gets are yours to rewrite, with a preview and a comparison to the original. The answer's shape is locked, so every edit is safe to try.
- Spend per model and per feature, with a monthly estimate at your real usage.
- AI output never sends anything. Ever.
Everything they sent you, in one feed.
The clip from last night's concert on WhatsApp. The reel your friend shared on Instagram. Photos from the family group. Kadabox gathers every picture and video people send you (from every chat, on every network) into one feed you can swipe through on the couch.
Double-tap to like
The like lands in their chat as WhatsApp's or Instagram's own ❤️ reaction, after a few seconds you can undo. Tap again to take it back.
Reply from the reel
Your answer quotes the video in the chat, exactly like a reply in the app itself, with the same undo.
Never see it twice
Watched marks follow you to every device: a photo after a moment on screen, a video once you've seen most of it. Skip what you've seen, or show only what's new.
Instagram reels that actually play
A reel shared in a DM usually arrives as a still. Kadabox fetches the video the moment it's on screen, no embeds, no tracking pixels.
Star, save, jump, open
Keep the good ones, save them to your phone, jump to the message in the chat, or open the post in Instagram or the chat in WhatsApp.
Tidy up
Delete from Kadabox only, the chat itself is never touched.
Filters that stack.
Every picture and video, newest first, under day headers, with your likes, stars and watched marks on the tiles. Combine filters: only Instagram reels from Leo, only the family's photos this week, only what you haven't watched. Try it:
12 photos and videos
0:12
Reel❤️
Post
★
❤️ 
0:09
❤️ ★
0:21Nothing matches all of those.
- From any people and groups you pick
- When today, this week, this month, this year
- On a computer it plays beside the grid, J and K to move, L to like, R to reply
- Private straight from your phone; on the web, through the encrypted tunnel
Drunk mode
Write it tonight. Send it in the morning.
Some nights you're not at your best. Turn on Drunk mode and Kadabox stands between you and the message you'd regret: the app glows so you never forget it's on, Send keeps what you write until the morning, and the people you'd rather not text get nothing at all.
It steps in by itself
Late at night it offers itself when you open Kadabox, when a draft looks risky and in an off-limits chat, or switches on by itself until the morning. Or pick your nights, like Friday and Saturday from 23:00.
Send holds it
Write all you want. Send keeps the message on your phone for the morning, with the reply it answers. Nothing leaves.
Ten seconds to send now
Sure it can't wait? Press and hold for ten full seconds. Files, reactions and votes too. Let go and it starts again.
Off-limits people
Mark your ex, your boss, anyone. While it's on they get nothing at all, not even with the press, and they leave your list.
Read it in the morning
A notification brings back what you held. Read it sober, then send, edit or delete each one. Nothing held ever goes by itself.
Hard to turn off
Turning it off asks first, takes the same ten-second press, then waits a minute, with Keep it on one tap away.
Small things you'll wonder how you lived without.
Undo, every time
Every send waits a few seconds, so a slip never leaves your phone.
Search everything
Every chat on every network at once, what they wrote, the translation and the words in their voice notes.
Ana · the same person
One person, every app
Link Ana's WhatsApp and Instagram: one memory, one history.
Send anything
Photos, videos, documents, audio and voice notes, with a caption each, and the same undo.
Built for the keyboard
J and K move, Enter sends and opens the next one, X starts the Inbox. Every key can be changed.
They won't see you read it.
Read in peace
Reading in Kadabox never marks anything as read on the network.
Queues and snooze
Up to twelve Inbox queues of your own. Snooze anyone until later, they come back on their own.
Yours to look at
Light or dark, eight wallpapers (one per chat if you like) the text size you like, and five app icons for your home screen.
Starred, with tags
Tag a starred message with an emoji, and a name, if you like. Starred filters by each one.
Polls you can vote in
WhatsApp polls arrive as polls: every answer with its votes, and yours a tap away.
New chats wait at the door
If you like, someone you've never written to lands in Archived, quietly, one tap brings them in.
A heads-up before you send
The fifth message in a row, a follow-up into days of silence, a wall of text to someone who writes two words, all caps, 3 am, the same words twice: a word before it goes. Read from the chat on your phone; a fix only fills the box, and you can always send. Pick the checks you want, or set them for one person in their Contact info.
Trim a voice note
Cut the start and the end of a voice note before it goes.
Four apps.One Kadabox.
The four apps you live in. Now one.
Each one linked from your phone, like a new device of your own, and as many accounts on each as you have.
Linked with a code, like WhatsApp on a laptop
- Chats and groups, @mentions
- Voice notes, photos, videos, files
- Replies and ❤️ reactions as WhatsApp's own
Sign in inside the app
- DMs and group chats
- Shared reels and posts that play right there
- Likes land as real reactions
Telegram
Through Telegram's official API
- Chats and groups
- Files, photos, voice
- Your number and a code, like any Telegram app
SMS & RCS
Paired with Google Messages by QR
- Texts beside everything else
- Group texts and pictures
- The same brief, ideas and translation
Your phone is the box. We can't open it.
Most inbox apps copy your messages to their servers to work. Kadabox does the opposite: it runs on your phone, the connections to WhatsApp, Instagram, Telegram and SMS, the database, the AI's memory, even a small AI model. All we keep is encrypted data, random numbers that only you can decrypt.
Shall we go to the concert on Saturday? I've got two tickets.
It stays on your phone
Chats, contacts, photos, memory and the networks' keys live in Kadabox's database on your phone. Not on our servers. Not in anyone's cloud.
End to end, to your browser
The web app reaches your phone through a tunnel encrypted with keys only your two devices have. To our relay it's encrypted data, random numbers only your devices can decrypt.
Backups you keep
Your settings, prompts and books in one encrypted file, saved wherever you like. Never your chats or connections. Only your recovery code opens it, and we never hold a copy.
Nothing sends itself
Every message leaves on your tap, after seconds you can undo. The AI only ever fills your message box.
Read in peace
Reading in Kadabox never marks anything read on the network. Archive, pins, stars and watched reels stay on your phone.
Deleting means deleted
Wipe a chat or stop syncing it and it's gone for good, overwritten in the database, not just hidden.
No ads, no push service
Your phone receives your messages itself and makes its own notifications. No Firebase, no ad network, no one reporting on you.
From your own connection
Your phone talks to WhatsApp and Instagram over your Wi-Fi or mobile data, like any phone, not from a data centre.
Your inbox in a browser. Sealed end to end.
Opening Kadabox on a computer never uploads your inbox. It stays on your phone; the browser sees only what your phone sends it, sealed all the way.
- 1
Your browser makes its own key
Open kadabox.com. The browser creates a brand-new key pair on the spot and shows only the public half, as a QR code. The private half never leaves it.
- 2
Only your phone can say yes
You scan it with Kadabox, on the phone in your hand. Each side works out the same secret by itself, it's never sent, so there's nothing to intercept.
- 3
Proved, not trusted
The QR also carries a one-time secret that never reaches us. Your phone proves its key with it and your browser checks the proof by itself, so a key swapped on the way simply fails.
- 4
Sealed, every byte
Every message, photo and voice note crosses our relay in AES-256-GCM, under keys only your two devices hold. A frame that's changed, replayed or out of order is thrown away.
- Your email alone opens nothingIts code opens your account page. Your messages open only where your phone said yes.
- Remove a browser in one tapEvery paired browser is listed on your phone. Take one off and its keys stop working.
- Your account stays phone-onlyPairing and backups can't be reached through a browser, not even a paired one.
- Nothing on our servers to stealThe browser shows your inbox live from your phone. We hold no copy of it, anywhere.
For the technical: X25519 key agreement → HKDF-SHA256 → AES-256-GCM on every frame, with counters as nonces and new keys per connection. Every frame is padded, so even its length stays private. Pairing proves both keys with a 50-bit secret only the QR carries (PBKDF2, 600,000 rounds → HMAC-SHA256). Signing in opens your account, never your inbox.
Private by design, everywhere you look.
Your phone holds the key
Signing in opens your account page. Your messages open only in a browser your phone paired, by scanning its code with the phone in your hand, your inbox appears exactly where you said yes.
A cloud with nothing to read
We keep your email, your plan and your devices' public keys. What crosses our relay is encrypted data, random numbers only you can decrypt, and none of it is kept. Your messages, contacts and memory live on your phone.
A new phone in minutes
Android's encryption and your lock screen guard the phone you have. On a new one, open your backup file and type its code to bring back your settings, prompts and books, then link your chats again and their history comes along.
A private line inside your phone
Kadabox's screens talk to its engine with a 256-bit secret made once on your phone. It's a line only Kadabox speaks on, fast, local and all yours.
Every file and link, handled with care
Files from contacts open as downloads, links are checked, message formatting is cleaned, and every page runs under a strict security policy. Your inbox shows exactly what people sent you, beautifully and safely.
AI that keeps your words yours
The model on your phone works without a single byte leaving it. Your own key talks straight to your provider. Kadabox credits run only through providers set to keep nothing, and every request passes through unlogged.
Help that doesn't give you away.
Every AI feature is built so the least possible leaves your phone, and often nothing does.
- On your phoneThe downloaded model answers without a byte leaving the device.
- Your own keyCalls go from your phone straight to your provider. We never see the key or the text.
- Only what's neededA reply idea reads that conversation; the brief, the chats waiting on you. Each job reads only what it needs, when it runs.
- Research that stays privateWeb lookups carry two short queries with names, numbers, emails, handles and links removed. Never the chat.
- Learning without wordsIdeas learn the shape of what you send, never what you said.
What we hold: almost nothing
- Your email, your plan and your devices' public keys
- What travels between your phone and your browser, encrypted end to end and never stored
- To us it's random numbers, the keys to read it live only on your devices
What only you can read
- Your messages, photos and voice notes
- Your contacts, and who you talk to
- What Kadabox remembers about people
- Your networks' session keys and your AI key
For the curious: the details
- The web tunnel
- X25519 → HKDF-SHA256 → AES-256-GCM per frame, counters as nonces, keys per connection, frames opened strictly in order. A live tunnel moves to new keys only once your own browser proves it holds them.
- Pairing
- The browser's QR carries its public key and a one-time secret that never reaches us. Both sides stretch it (PBKDF2-SHA256, 600,000 rounds) and prove their keys with HMAC-SHA256; a key changed on the way fails the check.
- Backups
- Only what you set up: settings, prompts, saved replies, books, tag folders. Never a chat, a message, what Kadabox remembers about people, or a network connection. Compressed → 4 MB chunks of AES-256-GCM under a random key, wrapped by your recovery code (eight groups of four, 160 bits; Argon2id, 64 MB, 3 passes). One file you keep wherever you like; we never have it or the code.
- On the phone
- The engine listens only inside your phone, on a new random port each start, and answers only requests carrying its 256-bit secret.
- Deleting
- SQLite's secure delete plus a checkpoint after every wipe: freed content is overwritten, not left in the file.
- Pages
- Every page carries a strict Content-Security-Policy: scripts only from our own files, the page's own inline code by hash, no framing by other sites.
- Account-only parts
- Your account, pairing and backups can only be reached by the app on your own phone, never through the web tunnel.
Better than juggling. Safer than the cloud.
People bring their chats together three ways today: they switch between apps, they put each app in a tab of a desktop hub, or they use a unified inbox like Beeper. Kadabox is the fourth way, one inbox your own phone runs, with an AI that helps you answer.
Switching between apps
Four icons, four badges, four searches, and the chat you meant to answer is always in the other one.
Your messages livein each app
Desktop hubs
Franz · Rambox · Ferdium · ShiftEach app's web page in its own tab of one window on your computer. Handy at a desk; on your phone it's back to switching.
Your messages livein each app's web session
Beeper
A unified inboxOne list for many networks, with apps for phones and computers. A clean inbox to read and send from.
Your messages liveon your devices, a few networks through its cloud
Kadabox
Your phone is the inboxOne calm list your phone runs itself, and an AI that writes in your voice, translates both ways, reads your voice notes and tells you who's waiting.
Your messages liveonly on your phone
| Compared | Kadabox | BeeperFree · Plus | Desktop hubsFranz, Rambox, Ferdium | Switching appsEach network's own |
|---|---|---|---|---|
| One inbox | ||||
| Every chat in one list | WhatsApp, Instagram, Telegram and SMS | Over ten networks | One tab per app | One app at a time |
| On your phone | The Android app, all of it | iPhone and Android | Desktop only | Each app's own |
| On any computer | Any browser, end to end from your phone | Desktop apps to install | The app you install | One web app per network |
| Who's waiting, card by card | The Inbox and the brief | Unread, and reminders on Plus | A badge per tab | Scroll and remember |
| Every photo and video in one feed | Reels, from every chat | Chat by chat | App by app | One gallery per app |
| Links that show what they are | Products, places and videos as cards | Link previews | Each app's own | Each app's own |
| AI that helps you answer | ||||
| Reply ideas in your own voice | Three for every message | Not offered | Not offered | Not offered |
| Read and answer in any language | Both ways, by itself | Not offered | Not offered | Copy, paste, translate |
| Voice notes as text | As they arrive, on every plan | On Plus | Not offered | Some apps, some languages |
| Catch me up, ask a chat, to-dos | On a tap, in any chat | Not offered | Catch-up on Franz's cloud plan | Not offered |
| AI that runs on your phone | Free, and nothing leaves it | Not offered | Not offered | Not offered |
| Privacy and calm | ||||
| Where your messages live | Only on your phone | Your devices; a few networks through Beeper Cloud | Each web session, on that computer | In each app |
| Read without sending read receipts | Always, on every plan | Incognito, on Plus | Not offered | A setting in each app |
| Nothing sends without your tap | And a few seconds to undo | Yes | Yes | Yes |
| Price | ||||
| The free plan | 3 accounts, every feature, AI on your phone | Up to 5 accounts | Free tiers, limits vary | Free |
From each product's own pages and FAQ, October 2026, they change, so check their sites. Beeper, Franz, Rambox, Ferdium and Shift belong to their owners; Kadabox isn't affiliated with them.
Your phone is the server
Everything lives on the phone in your pocket, connected the way it always was. A browser joins it end to end, our cloud only ever carries encrypted data.
An AI that answers with you
Ideas in your voice, translation both ways, voice notes as text and Catch me up, free on your phone, or with your own key at cost.
Made for catching up
The Inbox walks you through who's waiting, the brief says why, and Reels puts every photo and video in one feed.
From the first coffee to the couch.
- 📰
The brief over coffee
Six chats are waiting. One line on top says the concert and the Monday call come first.
- 🎤
Voice notes on mute
Three voice notes during a meeting? Read them instead, tidied, and translated if they need it.
- 📥
The Inbox, in four minutes
Card by card: reply with an idea, mark done, snooze. Inbox zero before lunch is over.
- 🇯🇵
Answer in Japanese
Kenji's message arrived in English. Your reply leaves in Japanese, in the polite tone you use with him.
- 🎬
Reels on the couch
Everything friends sent you today, in one feed, skip what you've watched, double-tap what you love.
Press a key, any of these.
The web app is built for the keyboard. Try J, K, Enter, X, N, D, 1, / or E right now.
JKEnter
XND
1/E
Ready in three steps.
- 1
Install on Android
Download Kadabox, open it and create your account, or skip that and stay local.
- 2
Link your chats
WhatsApp by code, Instagram by sign-in, Telegram by phone, SMS by QR. Your history comes along.
- 3
Open it anywhere
On a computer, go to kadabox.com and scan the QR from your phone. Same inbox, same speed.
Start free. Stay free, if you like.
Kadabox Start isn't a trial: every feature, AI on your phone and your own key at cost, for good. Kadabox Plus is for when you want the AI working before you even open a chat, and more of everything.
Which one is for you?
Four quick picks, the plan that fits lights up.
Chat accounts
The AI
Browsers
Books and research
Kadabox Start fits you. Everything you picked is in it, for good.
Kadabox Start
Everything you need, for good.
$0forever
no card, no trial
no card, no trial
Coming soon toGoogle PlayFor Android 9 or newer · the web app comes with it.
- Chats
- 3 chat accounts, any mix of the four networks
- The Inbox, the brief, Reels, link cards and search, all of it
- AI
- AI on your phone, free, nothing leaves
- Your own key at cost, no markup, ever
- Every AI feature, a tap away
- The built-in strategy books
- Web and safety
- 1 browser, end to end
- Encrypted backup files you keep
Kadabox Plus
AI included, working ahead of you.
$9.90a month
or $99.90 a year
or $99.90 a year
Create your free accountKadabox Plus is one tap away in your account when it launches.
- Everything in Start, and
- Up to 15 chat accounts
- Up to 12 Inbox queues of your own
- AI
- AI credits every month, top-ups any time
- AI that works ahead: ideas ready when you open a chat, memory kept fresh, the brief on a timer
- Your own books: upload, study, websites, web research
- Web and safety
- Unlimited browsers
What Kadabox Start includes. All of it, for good.
- The Inbox, card by card
- The brief
- Reels from every chat
- Search across apps
- Translation both ways
- Voice notes as text
- Reply ideas in your voice
- Memory of every person
- Catch me up and Ask
- To-dos and dates
- Link cards: products and places
- Undo every send
- A heads-up before you send
- Drunk mode for the late nights
- Read in peace, no receipts
- One person, every app
- Themes and wallpapers
- A browser, end to end
- Tags across every app
- Scheduled and repeating messages
- Reminders and birthdays
- Saved replies and your own styles
Three ways to power the AI. You choose, per task.
On your phone
A model downloaded to your phone, on Wi-Fi while it charges. Quick jobs run there by themselves, and nothing ever leaves.
FreeYour own key
OpenRouter, OpenCode Go or any OpenAI-compatible service. Your key stays on your phone and you pay your provider directly.
At cost, no markupKadabox credits
AI credits included every month, top-ups any time, through providers that keep nothing. No keys, no setup.
Included- Kadabox Start works for goodEverything you've set up keeps running, always.
- No markup on your keyYou pay your provider, and only them.
- Downgrade, keep it allEvery chat, memory and setting stays right where it is.
- Your chats stay yoursOn every plan they live only on your phone.
| Feature | Start | Plus |
|---|---|---|
| Chats | ||
| Chat accounts | 3 | Up to 15 |
| The Inbox, the brief, Reels, translation and search | Included | Included |
| Inbox queues | The default queue | Up to 12 of your own |
| AI | ||
| AI on your phone | Free, nothing leaves | Free, nothing leaves |
| Cloud AI | Your own key, at cost | Monthly credits, top-ups or your own key |
| AI that works ahead of you | A tap away | Ideas ready, memory fresh, the brief on time |
| Strategy books | The built-in sets | Plus your own books, websites and web research |
| Web and safety | ||
| Browsers, end to end | 1 | Unlimited |
| Encrypted backup files | Yours to keep | Yours to keep |
| Your chats, only on your phone | Always | Always |
Good to know.
Where are my messages stored?
On your phone, in Kadabox's own database. We keep only encrypted data, random numbers that only you can decrypt.
Can Kadabox send messages by itself?
No. Every message leaves only when you tap send, and you get a few seconds to undo. Reply ideas, translations, rewrites and dictation only fill your message box.
What's the heads-up above my message box?
Kadabox noticing what's easy to miss while you type: your fifth message in a row, a follow-up when they haven't answered in days, a message far longer than theirs, all caps, a lot of !!!, the middle of their night, the same words twice, a language they don't write in. It reads the chat on your phone, with no AI. If you like, the AI can also read how it will land once you pause. It never stops you: tap its fix to change the text, ✕ to dismiss, or just send. Settings → Alerts → Heads-up turns each check on or off, and a person's Contact info can set them just for that person. If a note is serious, Kadabox asks once before it goes (Send anyway is one tap), or never, as you choose.
What is Drunk mode?
For the nights you're not at your best. Turn it on from the menu, from Settings → Alerts or from your phone's quick settings, or let it come on by itself on the nights you pick. Late at night it also speaks up on its own: it offers itself when you open Kadabox, when a draft looks risky and when you open the chat of someone off-limits, and it can switch itself on until the morning. Settings → Alerts keeps all of it in one place, with the heads-up's checks. While it's on, a warm glow runs around the app, every heads-up check is on, and Send holds the message for the morning instead of sending it. To send now you press and hold for 10 seconds, and that goes for files, reactions and votes too. People you mark off-limits in their Contact info get nothing at all and leave your list until it's over. In the morning a notification brings you back to what you held: you read it and send, edit or delete each one. Nothing held ever goes by itself. Turning Drunk mode off takes the same 10-second press, then waits a minute, with Keep it on.
Can I schedule a message?
Yes. Write it, hold the send button and pick a time, your phone sends it then, and it can repeat every day, week, month or year. Every scheduled message stays in the chat's list, where you can send it now, edit it or move it. Scheduling it is your tap: it goes exactly as you wrote it.
What are tags?
Your own folders for chats, from every app at once, Work, Family, a trip. Add chats by hand, or let a tag gather every group, every chat on one app or everyone Kadabox knows as family. Each tag is a chip over your chats, a tab of its own and a coloured label on its rows. Tags live on your phone: nothing changes on the apps, and nobody else sees them.
Will people see that I read their message?
No. Read state in Kadabox is yours alone, it never marks anything as read on WhatsApp, Instagram, Telegram or SMS. Watching their photos and videos in Reels doesn't tell them either.
How do shop links and maps become cards?
Your phone reads the link's page itself (the product's photos, price, rating and description) or draws the map around a pinned place from OpenStreetMap, and keeps the card. Only that one page or map is asked for, from your own connection; nothing of the chat goes anywhere. Settings → Chats → Link cards turns it off, and then a tap on Show details reads one.
Which AI does it use?
Your choice, task by task: a model that runs on your phone for free, your own key from OpenRouter or any compatible provider (straight from your phone, with no markup) or, with Plus, Kadabox credits through providers set to keep nothing.
Can I use the AI without any cloud at all?
Yes. Download the free on-phone model and every feature that fits a phone runs there, translation, reply ideas, transcripts, summaries, rewrites. Only studying whole books and web research need a cloud model.
Does the AI read all my chats?
Only what a feature needs, when it runs, a reply idea reads that conversation, the brief reads the chats waiting on you. Everything that runs by itself is listed in Settings, and each one has a switch.
Does Kadabox learn from my messages?
Reply ideas learn the shape of what you send (which draft you picked, how much you edited, emoji in or out) never the words, and only on your phone. You can turn it off or wipe it in Settings.
Do likes in Reels really reach Instagram and WhatsApp?
Yes, a ❤️ in Reels is sent as that network's own reaction, after the same few seconds to undo. Tap it again to take it back. Watched marks are Kadabox's own and stay between your devices.
How does Kadabox connect to my apps?
Kadabox is independent. Telegram connects through its official API; WhatsApp, Instagram and Google Messages connect the way their own linked devices do, from your phone, on your own home connection, so it's simply you on your own device.
Is it safe to open my inbox in a browser?
Yes, that's exactly what it's built for. A browser joins only when you scan its QR code with your phone, which also carries a secret that proves both keys, and everything between them is sealed end to end with keys only those two devices hold. Your email alone can't open a single message, and one tap on your phone removes any browser.
Can Kadabox replace WhatsApp, Instagram, Telegram and Messages?
For everyday chatting, yes: read, answer, react, send photos, files and voice notes, all of it from Kadabox, on your phone and your computer. The apps stay installed, because Kadabox links to them the way a computer does; calls and setting up a new account still happen there.
Do I need my phone on for the web version?
Yes. Your phone is the inbox: the browser talks to it through an end-to-end encrypted tunnel, so it needs to be online. Everything you open is cached so it feels instant.
Is it light on my phone's battery?
Yes. Messages arrive the moment they're sent, and in between Kadabox rests: its background work wakes only when something new comes in, the bigger AI jobs on the phone wait for the charger, and the phone's model lets go of its memory as soon as it's done.
What about iPhone?
Kadabox is built for Android, where your connections run all day in the background. With an Android phone as your hub, the web version works beautifully in any browser, Safari on iPhone, iPad and Mac included.
How many accounts can I link?
Three on Kadabox Start, say, your WhatsApp, Instagram and SMS. Kadabox Plus raises that to fifteen, across any mix of networks.
What does Kadabox Plus cost?
$9.90 a month, or $99.90 a year, about two months free. AI credits are included every month. Kadabox Start stays free either way, with every feature.
Can I move to a new phone?
In minutes. Save a backup file wherever you like and keep your recovery code; on the new phone, open it and type the code, and your settings, prompts and books are back. Then link your chats again: each network brings its history along. A backup never holds your chats or connections, and we never hold a backup.
Is the demo on this page real?
It's the inbox's real look and behaviour, rebuilt to run in this page with invented people and replies written in advance. Nothing you type there is sent or stored.
Every chat. One inbox.
Get Kadabox.
Four apps become one. Coming soon for Android 9 or newer, link your chats and answer everyone, in your voice.
Coming soon toGoogle Play
Coming soon on theWeb