#3 in Collaboration & CommunicationUpdated 2026-08

AgentMail

by AgentMail · Email inbox API that gives AI agents their own addresses

78.5 — BenchRank score out of 100

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Overview

AgentMail is an API for creating and operating email inboxes that AI agents own, in the way Gmail serves humans. Inboxes are made with a single API call and cover threads and replies, attachments, drafts, scheduled send, labels, semantic search and realtime events. Access is via REST endpoints, typed SDKs, a CLI and an MCP server, with webhooks and websockets for delivery.

Best for: Developers giving AI agents their own email inboxes for two-way threads, attachments and webhooks.
Pricing: Free tier for 3 inboxes, then $20/month (Developer) or $200/month (Startup), with custom Enterprise pricing; no annual rates are shown.
Runs on: WebCLI

Strengths and trade-offs

Strengths

Inboxes created in one API call, no domain verification
Threads, attachments, drafts, realtime events, semantic search
Typed Python/TypeScript SDKs, a CLI and an MCP server
Free tier with 3 inboxes and no credit card required

Trade-offs

Free tier caps at 3 inboxes, 3,000 emails/month and 100 emails/day
Custom domains start only at the $20/month Developer tier
SOC 2 report requires the $200/month Startup tier
SSO, dedicated IPs, EU cloud and SLA are Enterprise, priced on request

Pricing

Published plans from AgentMail’s own pricing page, in USD. Usage charges and add-ons may apply on top.

AgentMail pricing tiers, monthly rates in USD
Plan	Monthly	Includes
FREE	Freeper month	3 inboxes 3,000 emails/month, 100 emails/day 3 GB storage No credit card required
DEVELOPER	$20per month	10 inboxes, 10,000 emails/month 10 GB storage, 10 custom domains 2 organisation seats Email support
STARTUP	$200per month	150 inboxes, 150,000 emails/month 150 GB storage, 150 custom domains 10 organisation seats SOC 2 report
ENTERPRISE	Contact sales	Everything in Startup, unlimited inboxes available Usage-based pricing and bulk discounts EU region cloud, BYO cloud deployment, dedicated IPs White-label platform and OIDC/SAML SSO

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 92 out of 100
API quality: 85 out of 100
Documentation: 100 out of 100
Agent friendliness: 82 out of 100
Pricing transparency: 100 out of 100
Changelog: 0 out of 100
Marketing site structure: 60 out of 100
Operational trust: 60 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 60 out of 100
Maintenance: 100 out of 100

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