OpenMail

Key facts: OpenMail, founded in 2026 and hosted in the EU, gives every AI agent its own inbox on your domain with one API call. Agents can sign up for tools, receive verification codes and reply to customers without sharing a Gmail account or a sending pool where one bad actor gets everyone flagged. Inbound mail arrives over webhook or WebSocket in under 500ms, with attachments parsed into text models can read, and each inbox keeps its own sending reputation.

Plans: Free tier with 3 inboxes and 3,000 emails a month. Pro starts from €9 a month and adds custom domains. A launch offer of 3 months of Pro with the code Launch2026 was listed as expiring on November 6, so check the site before relying on it.

Best for: Developers and teams running agents that need email. Who should skip it: anyone who only needs a normal human inbox.

Pros

• Each agent gets its own inbox and sending reputation, so one bad agent cannot flag the rest
• One API call per inbox, with webhook or WebSocket delivery in under 500ms
• Attachments are parsed into text that models can actually read
• Hosted MCP server and Hermes plugin, plus EU hosting

Watch out for

• A brand-new 2026 startup, so long-term deliverability is still being proven
• Custom domains sit behind the Pro plan from €9 a month
• The launch offer code was listed as expiring on November 6, 2026

Best for

Developers and teams running agents that need email, verification codes or customer replies. Who should skip it: anyone who only needs a normal human inbox.

Pricing

Free: 3 inboxes, 3,000 emails/month. Pro from €9/month with custom domains. Check the official site for the current launch offer.

FAQs

Why would an agent need its own inbox? So it can sign up for tools, receive verification codes and reply to customers without sharing a human account or a pooled sender reputation.

How fast does mail arrive? Inbound mail reaches your code over webhook or WebSocket in under 500ms, with attachments parsed to text.

Can I use my own domain? Custom domains are on the Pro plan; the free tier covers 3 inboxes and 3,000 emails a month.

Where is it hosted? OpenMail is EU-hosted, founded in Lithuania in 2026.