Compared · checked 5 November 2026
AgentMail alternatives
Eight other ways to give an AI agent its own email inbox, side by side: free plans, first paid plan, MCP and where the data lives.
Side by side
| Product | What it is | Free plan | First paid plan, a month | MCP | Data |
|---|---|---|---|---|---|
| AgentMail | Inbox API for agents, and AgentID for sign-in | 3 inboxes, 3,000 emails a month, 1 custom domain | $20: 10 inboxes, 10,000 emails | Yes | US; EU on Enterprise |
| Pidgeon | Inboxes for agents, each with an ID anyone can check | Unlimited inboxes, 3,000 emails a month, 1 custom domain | €20: unlimited inboxes, 10,000 emails | Yes | EU, every plan |
| Resend Inboxes | Stored, threaded inboxes beside Resend’s sending API | 3 inboxes, 3,000 emails a month, 3 domains | $20: 50,000 emails, $1 an extra inbox | Yes | Account data in the US |
| Nylas Agent Accounts | An inbox and calendar per agent, hosted by Nylas | 3 agent accounts, 3,000 emails a month, no custom domain | $15: 10 accounts, 10,000 emails, 1 domain | Not stated | US or EU, your choice |
| Molted | Inboxes for agents, every inbound message screened | 3 inboxes, 3,000 sends a month, shared domain only | $19: 10 inboxes, 3 domains | Yes | Operated from Sweden |
| machinemail.dev | Email for agents, with a trust level on every message | Unlimited inboxes, 3,000 messages a month, 1 custom domain | $9: 7,500 in and 2,500 out a month, 10 domains | Yes | Not stated |
| openmail.sh | Email API with a dedicated inbox per agent | 3 inboxes, 3,000 emails a month, no custom domain | €9 plus usage: 10 inboxes, 10,000 emails | Not stated | EU-based company |
| Agent Inbox (Novu) | Open-source inbox for agents across email, Slack and Telegram | A short demo | No pricing page found | Yes | Not stated |
| Hostinger Agentic Mail | An agent inbox inside Hostinger’s business email | None | $2.99 an inbox a month | Listed as coming soon | Not stated |
We make Pidgeon, so weigh this accordingly. Every figure is from each product’s own homepage and pricing page, read on 5 November 2026. Prices are in each product’s own currency.
How to choose
- Many inboxesAn inbox per customer or per runPidgeon and machinemail.dev have no inbox limit on the free plan; most others start at three.
- Data in the EUA European region by defaultPidgeon stores mail in the EU on every plan. Nylas lets you choose; AgentMail’s EU region is on Enterprise.
- Already on ResendSending and inboxes in one placeResend Inboxes sits beside the sending API you may already use. Received mail counts toward the same quota.
- A calendar tooMail and meetings from one accountNylas Agent Accounts include a calendar. Pidgeon addresses have one as well, over CalDAV.
- Proof of who sent itAn identity anyone can checkEvery Pidgeon message carries a signed statement of which agent sent it and whom it acts for. None of the others says it signs one onto its mail.
- ScreeningInbound mail checked firstPidgeon, Molted and machinemail.dev judge inbound mail before the agent reads it, each in its own way; AgentMail’s Agent Armor does so in Labs.
Asked often
What are the best AgentMail alternatives?
For an inbox per agent through an API: Pidgeon, Resend Inboxes, Nylas Agent Accounts, Molted, machinemail.dev and openmail.sh. Agent Inbox by Novu is open source, and Hostinger sells an agent inbox with its business email.
Which AgentMail alternative has the most free inboxes?
Pidgeon and machinemail.dev have no limit on inboxes on their free plans. AgentMail, Resend, Nylas, Molted and openmail.sh start at three.
Is there an AgentMail alternative with EU data storage?
Pidgeon stores mail in the EU on every plan, and Nylas lets you choose the EU. AgentMail offers an EU region on Enterprise; Resend stores account data in the US.
How were these compared?
From each product’s own homepage and pricing page, read on 5 November 2026. We make Pidgeon, so weigh our pick accordingly. LobsterMail’s site did not load that day, so it is not here.
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