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Give your AI agent an inbox.Keep the last word.

Every company’s email in one inbox. Your AI agent drafts, you approve.

Request early accessSee how it works

Free while in early access

Access you scope, mailbox by mailbox

Your agent sees only the mailboxes you choose.

  • Connect Claude, Grok or any MCP agent with one sign-in.
  • Pick what it can do in each mailbox.
  • Its replies can wait as drafts until a person approves them.
  • Every action is logged, and unverified email stays hidden from it.

Every company in one inbox

No more one Gmail tab per company.

  • Every address in one sidebar, with its own unread count.
  • Replies go out from the address that got the email.
  • Instamp shows the DNS records for each domain and checks them.
  • Folders like Gmail labels, plus Snooze and Sent.

Your team and your agents, in the same mailboxes

Hand work to a person or to an agent.

  • Each person sees only the mailboxes they need.
  • Assign a conversation to a teammate or an agent.
  • Internal notes never reach the customer.
  • Replies, assignments and drafts update live.

On the web and on your iPhone

  • iPhone app

    Works offline, with notifications and swipe to archive.

  • Passkeys

    Or a password with two-factor codes.

  • Held for review

    Email that fails SPF, DKIM or DMARC waits for a person.

Free while in early access

We set up each account with you, domain by domain. Tell us what you run.

We only use this to reply about your access.

Transactional email, stamped and accounted for.

Outstamp, also from us, sends your app’s password resets and receipts.

  • Every project sends in isolation.
  • Signed webhooks for every delivery and bounce.
  • Instamp’s sign‑in emails go out through it.
Visit outstamp.devFree to test. From €9 a month.