AgentMail
AgentMail creates new inboxes for AI agents. Mailgator protects the ones you already have.
Different products, different problems — here's an honest look at where each one actually fits.
| Mailgator | AgentMail | |
|---|---|---|
| What it does | IMAP/SMTP proxy for existing mailboxes | Creates new email addresses for agents |
| Works with your real inbox | Yes, any IMAP/SMTP provider | No — agents get new @agentmail addresses |
| Granular rules | Folder, sender, operation-level | No per-folder or per-sender filtering |
| Data location | 100% on your infrastructure | Cloud-hosted (their servers) |
| Human-in-the-loop | Built-in ask action |
No |
| AI framework integrations | Any (standard IMAP/SMTP + MCP) | LangChain, CrewAI, LlamaIndex |
| Pricing | From €3/mo | Free tier + usage-based |
If your agent needs its own email address — not access to an existing one — AgentMail handles that well. You get a fresh inbox per agent with an API to match. Great for support bots or workflow agents that shouldn't share a mailbox with real people.
AgentMail has native integrations for LangChain, CrewAI, and LlamaIndex. If you're building in one of those frameworks and want a quick drop-in, the SDK makes onboarding fast. Less boilerplate than configuring IMAP yourself.
AgentMail has a free plan for getting started — good for prototyping before you know what you need. Mailgator has a 7-day trial, not a permanent free tier.
Mailgator sits in front of your actual Gmail, Fastmail, or Exchange account. Your agent reads real emails from real people — you just control which folders, senders, and operations it can touch. No separate inbox to manage, no forwarding, no duplication.
Mailgator runs on your machine. Email credentials and message content never leave your network. AgentMail routes everything through their cloud — fine for some teams, a non-starter for others with compliance requirements.
TOML-based rules let you allow reading from "Invoices" while denying access to "HR." You can require human approval for every outbound email. AgentMail doesn't have this level of filtering because it doesn't proxy existing accounts — it creates new ones.
Standard IMAP/SMTP means any email client or AI agent can connect — no vendor-specific SDK required. There's also a built-in MCP server so Claude and other AI assistants can use it natively without any custom integration code.
Use AgentMail if your agent needs its own fresh email address and doesn't need access to existing mailboxes. Think: a support bot that receives email at bot@yourdomain, or a workflow agent that sends from a dedicated address. The SDK makes setup fast if you're already using LangChain or CrewAI.
Use Mailgator if your agent needs to read or send from a real person's inbox, and you want precise control over what it can access. The two products solve different problems. Some teams use both — AgentMail for bot-owned inboxes, Mailgator for guarded access to real ones.
7-day free trial. No credit card required.