AgentMail

AgentMail is an email inbox application programming interface built specifically for autonomous artificial intelligence agents and agentic workflows. It provides a REST application programming interface that gives agents their own real email addresses for two-way communication, handling threads, replies, and messages much like Gmail does for humans. The platform is designed to eliminate the limitations of traditional one-way notification email services to support interactive, stateful agent conversations.

• Create, manage, and operate email inboxes entirely via application programming interface
• Support for threads and replies to handle stateful two-way conversations
• Attachment parsing and handling for files such as PDFs, images, and documents
• Real-time events delivered via webhooks and websockets
• Semantic search capabilities across email data
• Support for custom domains and automated email data extraction
• Software development kits for Python, TypeScript, cURL, and a command-line interface

Pros

• Allows browser agents to automatically extract 2FA and OTP codes to complete service sign-ups
• Enables executive assistant agents to manage calendars, schedule meetings, and send summaries
• Automates document processing by parsing incoming invoices, receipts, and attachments
• Provides smart routing to ingest and direct support emails to appropriate handlers
• Handles deliverability, spam prevention, email headers, and threading directly

Cons

• The Free tier is limited to 3 inboxes, 3,000 emails per month, and 3 GB of storage
• The Developer tier caps usage at 10 inboxes, 10,000 emails per month, and 10 GB of storage
• Custom domains are limited to 10 on the Developer tier and 150 on the Startup tier
• Team member seats are capped at 2 on the Free and Developer tiers, and 10 on the Startup tier
• Specific pricing numbers for the Enterprise tier are not published on the page and require contacting sales

AgentMail fits developers and scaling teams building autonomous artificial intelligence agents that require email capabilities, such as browser automation agents, scheduling assistants, document processing systems, and customer service routers. It is a poor fit for humans seeking a traditional end-user webmail interface like Gmail, or teams sending unidirectional marketing blasts and transactional receipts without conversational agent logic.

AgentMail uses a freemium model with four main tiers. The Free tier costs $0 per month and includes 3 inboxes, 3,000 emails per month, 100 emails per day, 3 GB of storage, 2 team members, 2 webhook endpoints, and community support. The Developer tier costs $20 per month and includes 10 inboxes, 10,000 emails per month, 1,000 emails per day, 10 GB of storage, 10 custom domains, 2 organization seats, and email support. The Startup tier costs $200 per month and includes 150 inboxes, 150,000 emails per month, unlimited daily emails, 150 GB of storage, 150 custom domains, 10 organization seats, a SOC 2 report, and Slack channel support. The Enterprise tier features custom pricing with unlimited inboxes, bulk discounts, a white-label platform, usage-based pricing, EU region cloud, BYO cloud deployment, dedicated IPs, OIDC and SAML single sign-on, and custom SLAs.

Unlike traditional email services such as SendGrid or Mailgun which are optimized for one-way transactional notifications and marketing campaigns, AgentMail is built explicitly for conversational artificial intelligence agents. It operates as an independent email provider rather than a wrapper over Gmail, handling its own infrastructure and deliverability completely separately. It natively supports the concepts of stateful threads, inboxes, and attachments required by autonomous agents to read, understand, and reply to messages.

AgentMail provides software development kits for Python and TypeScript, a command-line interface, cURL endpoints, and an MCP server. It supports custom domains with configuration for DKIM, SPF, and DMARC records.