Agent Stack Directory

OpenMail

Email API that gives each AI agent its own inbox and address, with inbound mail delivered as structured data, automatic threading, webhooks, a CLI and a hosted MCP server, and EU data residency on every plan.

EmailNewFree tier listed

Pricing as listed on the vendor site on Nov 10, 2026: free tier Free: €0/month, 3 inboxes, 3,000 emails a month, 3 GB storage, no credit card, 100 sends a day; paid from €9 per month (Pro), 10 inboxes and 10,000 emails, then usage, with a free plan.

Is this your tool?

Get OpenMail featured in Email for $99/month. You get a labeled featured badge and a top spot in the category. Or claim the listing for free to request edits.

Secure checkout via Stripe. Cancel anytime.

Head to head

Compare OpenMail

Email

Alternatives to OpenMail

Full alternatives page