# AgentMail > Source: https://agentsindex.ai/agentmail Email inbox API that gives each AI agent its own address, threads, webhooks and MCP server. AgentMail is an email provider for AI agents: an API, SDKs and hosted MCP server that create inboxes programmatically and send, receive and thread mail. It adds custom domains, calendars, allow and block lists, IMAP and SMTP, and multi-tenant Pods. - Best for: Developers building AI agents that need to read, reply to, and organize email threads. Starting price Free From [agentmail.to/pricing](https://www.agentmail.to/pricing), checked 12 November 2026 - MCP server Yes - API Yes - Open source Partly - Self-host Partly, on Enterprise [Docs](https://docs.agentmail.to) What we checked - Pages last read: 12 November 2026 - Facts checked: 4 facts From 18 sources, read 20 October 2026 - AI answers: Not named in any of 62 Buyer questions, our November check [How we check](https://agentsindex.ai/methodology) [Editorial policy](https://agentsindex.ai/editorial-policy#not-for-sale) [Visit AgentMail](https://agentsindex.ai/go/agentmail) [Compare](https://agentsindex.ai/compare?cat=agent-tools-and-integrations&products=agentmail) ## At a glance ### Pricing - Plans: - Free · $0/month - Developer · $20/month - Startup · $200/month - Enterprise · Custom - Category: [Agent tools and integrations](https://agentsindex.ai/categories/agent-tools-and-integrations) - Tags: EU-hosted, Freemium, SOC 2 ### For developers - Works with: GitHub, Slack, Browser Use, x402, Cal.com ## What it actually does differently from a transactional email API AgentMail gives each agent a full, persistent inbox — not just a way to fire off outbound mail. It supports two-way conversations with threading, attachments, drafts, scheduled send, labels, and full-text search across every inbox in an org, plus real-time events over webhooks and websockets so an agent can react to incoming mail instead of polling. It also exposes IMAP/SMTP for compatibility with existing mail tooling, and an MCP server so agent frameworks can pick up inbox actions as tools. TechCrunch reported the founders built this specifically because Gmail's API imposes rate and volume limits and requires OAuth, both of which are awkward for software that provisions inboxes programmatically at scale ([https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/](https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/)). For a buyer choosing between 'bolt an agent onto Gmail' and 'give the agent its own mailbox,' this is a meaningfully different product shape, not a repackaged transactional-email API. ## Pricing Published in full on the pricing page, verified 28 August 2026 ([https://www.agentmail.to/pricing](https://www.agentmail.to/pricing)): Free — $0/month, no card required, 3 inboxes, 3,000 emails/month, 100 emails/day, 3 GB storage. Developer — $20/month, 10 inboxes, 10,000 emails/month, 1,000/day, 10 custom domains, 2 seats, email support. Startup — $200/month, 150 inboxes, 15,000 emails/day, 150 custom domains, 10 seats, and a SOC 2 report becomes available at this tier. Enterprise is custom (unlimited inboxes, white-label, EU-region cloud, BYO cloud, dedicated IPs, OIDC/SAML SSO) — no published floor. The jump from Developer to Startup is 10x the price for roughly 15x the inbox ceiling, which is the point at which a growing agent fleet needs to budget for a step change rather than a smooth scale-up. Early-stage startups can apply for a free month on the Startup tier via a Tally form linked from the pricing page. ## Abuse controls, because agent-provisioned inboxes are a new kind of risk Handing autonomous software its own email address invites spam and account-takeover risk that a human-operated inbox doesn't. According to the founders (via TechCrunch, [https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/](https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/)), new agent inboxes default to a 10-outbound-emails-per-day cap unless a human authenticates the account, the platform applies rate limiting on unusual activity spikes, monitors bounce rates, and randomly samples new accounts for sensitive keywords. A WorkOS writeup of a company demo (May 2026) independently describes the same allow-list-plus-daily-cap design as the default when an agent self-provisions an inbox from a prompt ([https://workos.com/blog/agentmail-mcp-night-4-email-identity-layer-agents](https://workos.com/blog/agentmail-mcp-night-4-email-identity-layer-agents)). These are vendor-described mechanisms, not independently audited, but the design — restrictive defaults, loosened deliberately — is the right shape for the risk, and it's unusual for a company this young to have thought about it this explicitly. ## Company, funding, and how young this still is AgentMail is a San Francisco company founded in 2025, went through Y Combinator's Summer 2025 batch, and lists a team of 10 as of 27 August 2026 ([https://www.ycombinator.com/companies/agentmail](https://www.ycombinator.com/companies/agentmail)). It raised a $6M seed round in March 2026 led by General Catalyst, with Y Combinator, Phosphor Capital, and angel investors including Paul Graham, HubSpot CTO Dharmesh Shah, Supabase CEO Paul Copplestone, and Ramp CTO Karim Atiyeh participating ([https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/](https://techcrunch.com/2026/03/10/agentmail-raises-6m-to-build-an-email-service-for-ai-agents/)). The founders told TechCrunch the product has 'tens of thousands' of human users, 'hundreds of thousands' of agent users, and more than 500 B2B customers — these are vendor figures with no independent corroboration and should be read as claims, not facts. Practically: this is a company six months past its first institutional raise, with a small team supporting infrastructure that agents rely on for identity and communication. That's not a disqualifier, but it's the right context for weighing uptime, support responsiveness, and longevity against a more established provider. ## What the vendor publishes about security and compliance AgentMail publishes DKIM/SPF/DMARC support, signed webhooks, MFA, and social SSO across all tiers on its pricing page. A SOC 2 report is available starting at the $200/month Startup tier; OIDC/SAML SSO, EU-region cloud, and BYO-cloud deployment are Enterprise-only and require contacting sales. There is no public security or trust-center page — agentmail.to/security returns a 404, and no independent trust-center listing (e.g., a Vanta or Drata public page) was found. A status page exists and is live ([https://status.agentmail.to](https://status.agentmail.to), Better Stack-hosted). For a buyer with a compliance checklist, that means the SOC 2 report itself is gated behind a paid tier and a sales conversation rather than published — reasonable for a young company, but it means you can't independently verify compliance posture before paying. ## Independent evidence is thin and mostly one enthusiastic customer The most substantive third-party writing found is a SaaStr blog post by Jason Lemkin describing how Claude recommended AgentMail to him, he signed up, and never evaluated a second option ([https://www.saastr.com/i-need-agentic-email-claude-said-try-agentmail-so-i-did-and-never-looked-at-anything-else/](https://www.saastr.com/i-need-agentic-email-claude-said-try-agentmail-so-i-did-and-never-looked-at-anything-else/)). It's a genuine testimonial — 'I'm a paying customer' — but it's framed almost entirely around AI-answer-engine strategy, not a comparative evaluation of deliverability, reliability, or support quality against alternatives like Postmark, Resend, or SendGrid. Beyond that and the TechCrunch funding writeup, we found no independent benchmarks, uptime data, or comparative reviews. The company's GitHub org (37 repos) shows active daily commits as of late August 2026 across its Python, Node, CLI, MCP, and docs repos ([https://github.com/agentmail-to](https://github.com/agentmail-to)), which is a reasonable proxy for active maintenance, but it is not a substitute for independent product evaluation. ## AgentMail price and terms ### Terms - Free plan: Yes Free plan, no card: 3 inboxes, 3,000 emails a month, 100 emails a day, 3 GB storage · The terms in full · No custom domains, a "Sent via AgentMail" footer on outgoing mail, no email support and no SOC 2 report access. - Card to start: Not required - Sign up without sales: Yes ## For AI agents - MCP server: Yes - API: Yes [Developer docs](https://docs.agentmail.to) [![AgentMail](https://agentsindex.ai/img/1024/screenshots/agentmail/pricing.webp)](https://agentsindex.ai/img/1920/screenshots/agentmail/pricing.webp) Pricing page, captured 19 October 2026 [agentmail.to/pricing](https://www.agentmail.to/pricing), checked 12 November 2026 ### All plans and limits | Plan | Price | Inboxes | Custom domains | Emails per day | | --- | --- | --- | --- | --- | | Free | $0 a month | 3 | 1 custom domain | 100 emails/day | | Developer | $20 a month | 10 | 10 | 1,000 emails/day | | Startup | $200 a month | 150 | 150 | 15,000 emails/day | | Enterprise | Price on request | Unlimited available | Not stated | Not stated | Read 12 November 2026 from [agentmail.to/pricing](https://www.agentmail.to/pricing). ## What we checked on AgentMail Yes Partly No What it costs to start Yes ### Free tier A standing Free plan runs indefinitely with 3 inboxes, 3,000 emails a month and 3 GB of storage, and it includes the MCP server, webhooks and Pods. > Free — $0/month For getting started. No credit card required 3 inboxes 3,000 emails/month 100 emails/day 3 GB storage Plans, Free card [agentmail.to/pricing](https://www.agentmail.to/pricing) Checked 20 October 2026 How you build with it Yes ### Public API A public REST API is the product itself, documented endpoint by endpoint with Python, TypeScript, Go and other samples, plus Python and TypeScript SDKs and a CLI. > Programmatic inbox creation via REST API Key capabilities list, first bullet [agentmail.to](https://www.agentmail.to/) Checked 20 October 2026 How you build with it Yes ### MCP server A hosted MCP server is published for Claude, ChatGPT, Cursor and other clients, with OAuth or API-key auth, and the pricing table shows it on every plan including Free. > AgentMail runs a hosted MCP server at https://mcp.agentmail.to/mcp that exposes inbox, message, thread, draft, attachment, and calendar tools to any… Overview, first paragraph [docs.agentmail.to/integrations/mcp](https://docs.agentmail.to/integrations/mcp) Checked 20 October 2026 How you build with it Partly ### Open source The clients around the service are MIT licensed on GitHub, including the MCP bridge, Python and TypeScript SDKs, CLI and docs, while the inbox platform and API that do the work are closed. On the page: Repository sidebar, License Repository sidebar, License [github.com/agentmail-to/agentmail-mcp](https://github.com/agentmail-to/agentmail-mcp) Checked 20 October 2026 ## AgentMail alternatives - [TinyFish](https://agentsindex.ai/tinyfish) · The team behind TinyFish runs this listing · One web layer for agents: free search and fetch, plus hosted browsers and goal-driven web automation. · Free, then $0.002 per minute Checked 11 Nov · ISO 27001 · [Visit](https://agentsindex.ai/go/tinyfish) - MCP server - API - Open source - Self-host - AgentMail and TinyFish | AgentMail | Free, then $20 a month | 20 Oct | | --- | --- | --- | | [TinyFish](https://agentsindex.ai/tinyfish) | Free, then $0.002 per minute | 11 Nov | ## Where we've written about AgentMail - [AI agent tools that let you take your data out](https://agentsindex.ai/blog/ai-agent-tools-that-let-you-take-your-data-out) ## Questions about AgentMail - How much does AgentMail cost?: AgentMail has a free plan. Its paid plans are Developer at $20 a month, Startup at $200 a month and Enterprise. From agentmail.to/pricing, checked 12 November 2026. - Does AgentMail have an API or an MCP server?: It has an API. It has an MCP server. - Is AgentMail open source, and can you host it yourself?: Part of it is open source. You can host it yourself on Enterprise. - What have we checked on AgentMail?: 4 facts, under these headings: What it costs to start, how you build with it. - How do we check AgentMail?: We hold 4 facts on AgentMail, quoted from 18 pages. Facts last checked 20 October 2026. Price last checked 12 November 2026. [How we check every listing](https://agentsindex.ai/methodology) ## Sources and changes Last changed 12 November 2026 Sources 18 - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/pricing) /pricing - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/knowledge-base/change-plan-billing) /knowledge-base/change-plan-billing - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/knowledge-base/security-compliance) /knowledge-base/security-compliance - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/security) /security - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/docs/calendar) /docs/calendar - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/docs/lists) /docs/lists - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/integrations/mcp) /integrations/mcp - Read 20 October 2026 · [agentmail.to](https://www.agentmail.to/) / - Read 20 October 2026 · [github.com](https://github.com/agentmail-to/agentmail-mcp) /agentmail-to/agentmail-mcp - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/api-reference/inboxes/events/list) /api-reference/inboxes/events/list - Read 6 November 2026 · [agentmail.to](https://www.agentmail.to/docs/auto-forwarding) /docs/auto-forwarding - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/docs/introduction) /docs/introduction - Read 12 November 2026 · [agentmail.to](https://www.agentmail.to/docs/messages) /docs/messages - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/imap-smtp) /imap-smtp - Read 20 October 2026 · [agentmail.to](https://www.agentmail.to/legal/privacy) /legal/privacy - Read 20 October 2026 · [agentmail.to](https://www.agentmail.to/legal/terms) /legal/terms - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/permissions) /permissions - Read 20 October 2026 · [docs.agentmail.to](https://docs.agentmail.to/welcome) /welcome ## Similar in Agent tools and integrations [See all in Agent tools and integrations](https://agentsindex.ai/categories/agent-tools-and-integrations) - [ERIUS PHONE](https://agentsindex.ai/eriusphone) A dedicated virtual Android phone per AI agent, with Google Play apps and sign-ins that persist between sessions. From about $45 a month - [ClineFlow](https://agentsindex.ai/clineflow) Git-native project memory and handoffs for coding agents. Free plan - [Automater](https://agentsindex.ai/automater) Desktop tray app that indexes every local AI coding session, flags stalled agents and meters quota. Free plan, then $29 a year - [UI Discovery](https://agentsindex.ai/uidiscovery) Library of real website and app UI sections, queryable by AI assistants over MCP and a REST API. Free plan, then $15 a month ## From our research [All research](https://agentsindex.ai/blog) - [Comparison](https://agentsindex.ai/blog/daytona-vs-e2b-vs-modal) 16 Oct 2026 Daytona vs E2B vs Modal: which sandbox for agent code? Daytona, E2B and Modal compared on sandbox pricing, concurrency, GPU support and open-source status, plus why Daytona's flagship repo is now archived. - [Buyer's guide](https://agentsindex.ai/blog/erius-phone-ai-agent-android-device) 9 Oct 2026 ERIUS PHONE review (2026): pricing, pros and cons ERIUS PHONE rents AI agents real cloud Android phones they drive by API, priced monthly per phone in euros, but it offers no webhooks. - [Buyer's guide](https://agentsindex.ai/blog/hyper-review-autonomous-coding-agent) 13 Oct 2026 Hyper review (2026): an autonomous coding agent that ships verified pull requests Hyper plans, tests and delivers pull requests to your GitHub repository from an isolated cloud sandbox, with a verification check on each one and a hard spending cap on every run. ## Is this yours? Claim it free, then see who reads this page and carry the verified owner mark. You confirm it with an email at agentmail.to. 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