Open Agent Inbox

Problem
Giving an AI agent its own inbox is difficult and expensive. Creating inboxes programmatically
typically involves paying a hosted provider. One current option, AgentMail’s free tier, only offers
three inboxes, 3,000 combined inbound and outbound emails per month, and 3GB of storage.

Who it Helps
OpenAgentInbox helps agents, startups, enterprises, and anyone who uses email. Agents can
create inboxes, then send and receive emails. Startups can add as many mailboxes as they need.
Enterprises can self-host unlimited agent mail. Everyday users can give their agent its own inbox
instead of sharing their personal email.

Solution
AI agents need email addresses and inboxes. OpenAgentInbox allows your agent to make email
addresses and send emails on the fly. Unlock new agent workflows requiring email with
open-source unlimited inboxes and inbound emails and up to 3,000 outbound emails per day.
OpenAgentInbox is an agent-native email toolbox that builds on Supabase, Resend, and
Cloudflare, without a paid tier.

Impact
Open-source inbox tooling allows for unlimited inboxes, letting every agent send, receive, and
keep its own email threads without sharing a human mailbox. With 3,000 outbound emails a day,
startups can add agent email addresses for sales and customer support to find product market fit.
Enterprises can use a self-hosted OpenAgentInbox instance to QA and smoke test their login
pages or sign up flows. Everyday users can let their agent sort receipts, draft replies, and chase
follow-ups without cluttering their personal inbox.