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Free during early access

All the good stuff.None of the fluff.

Kolbaba is a fast, calm email client for Gmail and any IMAP inbox. One clean list, an editor that writes like Notion, and a safe door for your AI agents. That’s it.

Open Kolbaba See how it works
  • Runs in your browser and on iPhone
  • No ads, ever
  • Your mail stays in your mailbox
app.kolbaba.app
Why Kolbaba

Other email apps keep adding. We kept taking away.

Email is simple: read it, answer it, find it, get on with your day. So we cut everything that gets in the way and polished what’s left until it feels effortless.

  • Ads between your emails
    No ads. Your inbox isn’t a billboard.
  • A different app for every account
    Gmail and any IMAP account, in one list.
  • $30 a month for an inbox
    Free in early access. A fair price after.
  • An AI sidebar that never stops talking
    No AI pushed on you. Bring your own agent, if you want one.
  • Tabs that decide what matters to you
    You decide: pin it, snooze it, get reminded.
  • Waiting on app store updates
    Opens in your browser, installs on iPhone, always up to date.
Inside

Everything email should do. Done properly.

One calm inbox for all your mail

Personal Gmail, your work domain, that address you’ve had since 2009: one list, each mailbox in its own colour. Gmail connects with a click. For anything else, type your address and password and Kolbaba finds the servers itself.

  • Unified inbox, filter by account in one click
  • Two-line previews, unread at a glance
  • Pins sync as Gmail stars and IMAP flags

Write like in Notion. Send real email.

Press / for headings, checklists, tables, quotes or code, and drag blocks around. Your recipient gets clean email that looks right in every mail app, with a plain-text version added automatically.

  • Markdown shortcuts
  • A signature for every mailbox
  • A few seconds to undo after you hit Send

Send it later. Deal with it later.

Schedule a message for Monday at 8:00, snooze a thread until you can actually act on it, and let Kolbaba nudge you when nobody replies. Your inbox only holds what needs you now.

  • Scheduled send
  • Snooze to a time that suits you
  • A reminder when nobody replies

Small things, done right.

JKERH⌘K

Keyboard first

J and K to move, E to archive, R to reply, H to snooze. ⌘K for everything else.

Sending… Undo

Undo, everywhere

Archived the wrong thread? Sent too soon? Every action like that comes with an Undo.

Opened 2× · last 12:43 · iPhoneDelivered to Apple Mail

Read receipts, honestly

See when your message was opened. When Apple Mail merely preloads it, we say “delivered”, not “opened”. Off until you turn it on.

website-notes.pdfMaya · Wedpumpkin-loaf.jpgMaya · 11:01budget-q4.xlsxSam · Mon

Every attachment on top

All files in a thread sit in one bar above the conversation, with who sent them and when.

Feedback…DraftHike?

Tabs for your mail

Keep a few threads and drafts open side by side and flip between them.

Light and dark

Follows your system, day and night.

For your AI agents

Let your AI agents in. On a short leash.

Kolbaba has a built-in MCP server, so Claude, ChatGPT, Cursor or any MCP client can search, read, sort and draft for you. You decide how far each one may go, and you see every step it takes.

  • Read onlySearch and read. Nothing else.
  • Organize & draftArchive, pin, snooze and write drafts. You press Send.
  • Full accessEverything, sending included. For agents you really trust.

AI activity. Every run of every agent, grouped by what it was asked to do, with an Undo next to anything reversible.

Works with Claude, ChatGPT, Cursor and any other MCP client.

ClaudeChatGPTCursorClaude CodeMCP
iPhone

In your pocket. No App Store.

Add Kolbaba to your Home Screen and it behaves like a native app: push notifications for new mail, an unread badge on the icon and swipe gestures. Updates arrive the moment we ship them.

  • Swipe to archive or snooze
  • Push notifications and a badge
  • A Mac app is on the way
Friday 9 October
9:41
Maya Chennow
Feedback on the new website — A simple list sounds perfect. One more small thing…
3
Why “Kolbaba”?

Named after a postman who hated junk mail.

In Karel Čapek’s The Postman’s Tale (1932), the postman Kolbaba grumbles that all he ever carries is forms, bills and nonsense that make nobody happy. Then he spends a year and a day delivering a single letter with no address, because it was written with the whole heart.

That’s the job we want: deliver what matters and skip the rest. Čapek is also the writer who gave the world the word “robot”, which suits a mailbox built for people and their AI agents.

Privacy

Your mail is yours.

One day we’ll earn money from a fair subscription. Never from your data.

No ads, no selling

We don’t show ads, and we don’t sell or share your data. Ever.

Locked up properly

Mailbox passwords and tokens are encrypted with AES-256, each with its own key.

Senders can’t spy on you

Remote images are blocked by default, so tracking pixels in incoming mail stay dark.

No AI training

Kolbaba has no AI of its own, and your mail never trains anyone’s model.

Your mail stays put

Kolbaba is a client. Your messages stay with Gmail or your own provider.

Leave whenever you like

Disconnect a mailbox and its mail is deleted from our servers. Want your whole account gone? Just ask.

Read the privacy policy
FAQ

Questions, answered.

Is Kolbaba free?

Yes, while it’s in early access. Later there will be a paid plan at a fair price. You’ll hear about it well in advance, and nothing will be charged without your explicit consent.

Which email accounts can I connect?

Gmail and Google Workspace, Seznam and Email.cz, and any provider with IMAP and SMTP, including your own domain. Outlook, iCloud and Yahoo are next.

Do I need to install anything?

No. Kolbaba runs in your browser. On iPhone, open it in Safari and choose Share → Add to Home Screen to get push notifications and an unread badge. A Mac app is on the way.

Does my mail stay in Gmail?

Yes. Kolbaba is an email client, not a new address. Your messages stay with your provider, and whatever you do in Kolbaba (archive, pin, mark as read) shows up in your other apps too.

What is MCP, and do I need it?

MCP is an open standard that lets AI assistants like Claude or ChatGPT use tools. You don’t need it at all. If you’d like an agent to help with your mail, you can connect one in a minute and choose how much it may do.

Can an AI agent send email as me?

Only if you give it Full access. With Read only or Organize & draft it can’t send anything. Every step shows up in AI activity, and reversible actions can be undone.

Is my data safe?

Mailbox credentials are encrypted, incoming mail is sanitised and shown without remote images, and we never sell your data or show ads. The details are in our privacy policy.

Email, the way it should be.

Open Kolbaba in your browser, connect a mailbox and you’re in. Free while we’re in early access.

Open Kolbaba