ONE MAILBOX / TWO OPERATORS Human + agent collaboration

Let the agent work. Keep the human in the inbox.

Startup Mail gives people and AI agents access to the same real custom-domain mailbox. Agents use scoped API keys, webhooks, or MCP. People review the same threads in a web inbox and take over when judgment matters.

Start a shared mailbox Read the agent guide
Mailbox-scoped access Shared thread history $12 billed yearly
ACCESS LEDGER / SUPPORT@NORTHSTAR.STUDIO2 OPERATORS
SHARED SOURCE OF TRUTHsupport@northstar.studioACTIVE
PERSONMara · web inbox

Read, review, amend, and send

FULL
AI AGENTSupport triage · scoped key

Read threads and prepare drafts

LIMITED
WEBHOOK API MCP

Permissions stay explicit, mailbox by mailbox.

The short answer

Use one durable mailbox as the record. Let automation handle routine work; let people see the original message, proposed reply, and complete conversation before anything sensitive leaves the company.

THE SAME MAIL, ON BOTH SIDES

Not a chatbot beside an inbox. The inbox itself.

Incoming messages remain searchable and threaded. A person can open the exact conversation an agent is processing instead of reconstructing it from copied events.

WEB INBOX / SHARED MAILBOX REAL PRODUCT
Startup Mail web inbox showing a shared company mailbox and its message threads
The local demo workspace uses representative messages and addresses; no customer mail is shown.
CONTROLLED HANDOFF

Routine work moves. Responsibility stays visible.

  1. 01

    Mail arrives once

    The complete message and thread remain in the shared mailbox.

  2. 02

    The agent handles the narrow task

    A mailbox-scoped key exposes only the tools and actions the workflow needs.

  3. 03

    A person reviews the source

    Open the same thread, inspect recipients and attachments, then amend or send.

GOOD FIT

Work that benefits from automation and an obvious handoff.

  • Support triage and reviewed replies
  • Vendor, booking, and operations inboxes
  • Extracting structured data from expected mail
  • An agent with its own durable company identity
LEAST PRIVILEGE, SHOWN

Give the workflow a key—not somebody’s password.

Create access for one mailbox and choose the capabilities the workflow needs. Start read-only, then add draft or sending access when the process has earned it.

SETTINGS / AGENT ACCESS REAL PRODUCT
Startup Mail settings showing scoped access controls for an AI agent
Product screenshot from the local demonstration workspace.
READY
TO RECEIVE

ONE REAL MAILBOX · PEOPLE + AGENTS · $1/MONTH

Share the work without splitting the conversation.

Start for $12 a year with every email feature and 1,000 included monthly email events.
Start a shared mailbox Read the quickstart