Email inboxes for AI agents, compared
AgentMail, Cloudflare, Zoho, Mailtrap, Google's Gemini agents, your own Gmail and Faivelo: where each one fits, what fifty agent inboxes cost, and which ones a person can open.
Every option on one page
An agent inbox is an address software operates: it sends, receives and keeps threads, through an API or MCP. These are the ways to get one in October 2026.
| Option | Built for | Address | Free start | 50 agent inboxes | MCP | IMAP and SMTP | Status |
|---|---|---|---|---|---|---|---|
| Faivelo | Agents that work like staff on your domain, next to your team's email | Your domain from $15, or a free fvlmail.com address | 3 inboxes, 3,000 emails a month, no card | $15 a month | Hosted, with OAuth for claude.ai or an agent key | Yes, plus JMAP | Available |
| AgentMail | An inbox per task or per user, created by the thousand | agentmail.to on Free, your domain from $20 | 3 inboxes, 3,000 emails a month (100 a day) | $100 a month (Developer plus 40 add-on inboxes) | Yes | Yes | Available |
| Cloudflare Email Service | Developers already building on Workers | Your domain on Cloudflare | Inbound is free; sending needs Workers Paid | No mailboxes; you store mail in your own Worker | Email MCP server | No hosted mailbox | Public beta since April 2026 |
| Zoho AgentInbox | Teams that want each agent audited like an employee | Not stated in the launch post | Early access sign-up | Not published | Yes, with a REST API; SDKs coming | Not stated | Early access since September 2026 |
| Mailtrap Agent Inbox | Inbound mail as a trigger for an agent workflow | Hosted address first, your domain later | Not listed on the pricing page | Not published | Mailtrap MCP server | Not stated | Available |
| Gemini coworker agents | Companies on Google Workspace | agents.yourcompany.com, inside Workspace | No | Not published | Not applicable | Not stated | Announced 8 October 2026, businesses first |
| Your own Gmail or Outlook | An assistant working one person's inbox | Your own address | Your existing seat | One seat per agent | Third-party connectors | Yes | Available |
Read on each vendor's own pricing page, docs or launch post on 13 October 2026. "Not published" and "not stated" mean the vendor's page does not say.
What a fleet of agent inboxes costs
AgentMail and Faivelo are the two that publish agent-inbox prices. AgentMail charges by the inbox past its plan; Faivelo charges by plan, so the bill stays flat from 3 inboxes to 50.
| Agent inboxes | AgentMail / month | Faivelo / month |
|---|---|---|
| 3 | $0 | $0 |
| 10 | $20 | $15 |
| 50 | $100 | $15 |
| 150 | $200 | $150 |
| 500 | Enterprise, custom | $150 |
Monthly list prices. AgentMail at 50 is the $20 Developer plan plus 40 inboxes at its $2 add-on price; at 150 its $200 Startup plan. Faivelo Developer is $15 for 50 inboxes and 20,000 emails a month, Scale $150 for 500.
Which one fits your agents
Pick AgentMail
when your product creates an inbox for every end user or every task, in the thousands, and nobody needs to open them. It is built for that shape, offers websockets for inbound mail, and its Startup plan comes with a SOC 2 report.
Pick Cloudflare Email Service
when your agent already runs as a Worker and you are happy to store and thread mail yourself. Receiving is free and unlimited, and sending is cheap at volume.
Pick Gemini coworker agents
when your whole company lives in Google Workspace and the agent should sit in Chat, Drive and the directory next to everyone else.
Pick Faivelo
for everything in between, which is most teams. The agent gets a real mailbox on your domain that a person can open over IMAP or in the Inboxes console, the price stays flat from 3 inboxes to 50, and the hosted MCP server connects to Claude without a key to paste. The same account can host your team's own email too.
Agent inboxes, answered
More reading: Faivelo vs AgentMail, what agentic email means and how to give an agent an address.