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    Agentmail

    Email & Communications

    AgentMail is an API-first email platform that gives AI agents and automated workflows real, programmatic inboxes—similar to how Gmail serves humans, but purpose-built for machines.

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    Agentmail Overview

    AgentMail is an API-first email platform that gives AI agents and automated workflows real, programmatic inboxes—similar to how Gmail serves humans, but purpose-built for machines. Instead of stitching together SMTP, webhooks, and storage, AgentMail provides a full inbox infrastructure: create inboxes via API, send and receive emails, maintain persistent threads, label and search messages semantically, and extract structured data from content and attachments. It integrates natively with popular AI frameworks like LangChain, LlamaIndex, and CrewAI, and offers real-time eventing through webhooks and WebSockets so agents can react instantly to incoming mail. Designed for developers building autonomous systems, multi-tenant apps, QA/verification pipelines, and support automation, AgentMail emphasizes rapid onboarding (first email in minutes) with simple API-key authentication. Deliverability and operations are covered with custom domains, SPF/DKIM/DMARC, dedicated IPs on higher tiers, and SOC 2 Type II compliance. Teams can isolate workloads with “pods” for clean multitenancy and scale from a free tier to enterprise features like white-labeling, EU-region hosting, SSO (OIDC/SAML), and BYO cloud. If your product needs two-way email that agents can create, manage, and reason over—without the complexity and limitations of human-centric inboxes—AgentMail provides the end-to-end inbox API to ship faster and scale confidently.

    Key Features & Capabilities

    Programmatic Inbox Creation

    Create and manage inboxes entirely via API—no manual setup, OAuth, or consoles. Ideal for multi-tenant apps, ephemeral test inboxes, and agent-per-user architectures.

    Two-Way Email with Threads and Storage

    Send and receive emails while preserving conversation context with Message-ID and reply headers. Built-in threading, labels, and persistent storage keep agents stateful.

    Real-Time Events via Webhooks and WebSockets

    Subscribe to inbox events for instant agent reactions to new mail, replies, and status changes. Event-driven workflows are easy to build and operate at scale.

    Semantic Search and Data Extraction

    AI-powered search across message history and automatic parsing of HTML and attachments to extract structured data, enabling smarter automations and workflows.

    Deliverability and Custom Domains

    Use your own domains with SPF, DKIM, and DMARC. Higher tiers support dedicated IPs for reputation control, ensuring reliable delivery for production traffic.

    Pricing Plans

    Free

    Free
    • 3 inboxes
    • 3,000 emails/month (100/day limit)
    • 3 GB storage
    • 2 inbox pods and 2 webhook endpoints
    • Threads, labels, attachments, drafts, schedule send
    • Webhooks, DKIM/SPF/DMARC
    • TypeScript/Python SDKs and MCP Server
    • 2 team members
    • No credit card required

    Developer

    $20/month
    • 10 inboxes
    • 10,000 emails/month (no daily limit)
    • 10 GB storage
    • 10 custom domains
    • 2 inbox pods and 2 webhook endpoints
    • Threads, labels, attachments, drafts, schedule send
    • Webhooks, DKIM/SPF/DMARC
    • TypeScript/Python SDKs and MCP Server
    • 2 team members
    • Email support

    Startup

    $200/month
    • 150 inboxes
    • 150,000 emails/month
    • 150 GB storage
    • 150 custom domains
    • 10 inbox pods and 10 webhook endpoints
    • Threads, labels, attachments, drafts, schedule send
    • Webhooks, DKIM/SPF/DMARC
    • Dedicated IPs
    • SOC 2 report
    • Slack channel support
    • 10 team members

    Enterprise

    Custom
    • Everything in Startup
    • Custom volume pricing
    • White-label platform
    • EU region cloud
    • Bring-Your-Own (BYO) cloud deployment
    • OIDC/SAML SSO
    • Custom SLAs and dedicated support
    • Custom limits for inboxes, domains, pods, endpoints, and storage

    All plans include threads, labels, attachments, webhooks, SDKs, and DKIM/SPF/DMARC. Free plan has a 100 emails/day cap; paid tiers have no daily cap. SOC 2 Type II certified. Custom domains available on paid plans; dedicated IPs and Slack support start at Startup. Enterprise adds SSO, EU cloud, white-labeling, and BYO cloud.

    Pros & Cons

    Pros

    • Full inbox infrastructure for agents: programmatic inbox creation, two-way email, persistent threads, and labels out of the box
    • AI-native features like semantic search and intelligent parsing of emails and attachments
    • Event-driven design with webhooks/WebSockets and simple API-key auth enables <3 minute time-to-first-email
    • Multitenancy via “pods” to isolate customers/users/agents, ideal for SaaS and large-scale automation
    • Enterprise readiness with SOC 2 Type II, dedicated IPs, custom domains, EU-region hosting, and SSO (OIDC/SAML)

    Cons

    • ×Newer service compared to incumbents like Gmail/SendGrid, which may concern risk-averse teams
    • ×No native mobile app or traditional mailbox UI—API-first approach may require building your own interface
    • ×Learning curve for non-developers; best suited to teams comfortable with APIs and webhooks
    • ×Free tier limits: 100 emails/day, 3 inboxes, 3 GB storage—may be restrictive for heavier testing
    • ×Advanced capabilities (dedicated IPs, Slack support, SSO, white-label) require higher-tier plans

    Alternatives to Agentmail

    Resend

    Modern sending-focused API with React Email templates and inbound via webhooks; lacks persistent inbox and threading compared to AgentMail.

    Frequently Asked Questions

    Can I use my own domain with AgentMail?

    Yes. AgentMail supports custom domains on paid plans, allowing you to send and receive from addresses like agent@yourdomain.com with SPF, DKIM, and DMARC.

    Can I access AgentMail inboxes from my phone?

    AgentMail is API-only and doesn’t provide a native mobile app. You can build a lightweight UI using the API or forward events via webhooks to other destinations.

    Is there a free tier or trial?

    Yes. The Free plan includes 3 inboxes, 3,000 emails/month (100/day), and 3 GB storage—no credit card required. It’s ideal for testing and initial integrations.

    Is AgentMail secure?

    AgentMail uses TLS and data encryption, API key authentication, and webhook signature verification. The company is SOC 2 Type II certified, and Enterprise adds SSO (OIDC/SAML).

    Does AgentMail integrate with AI frameworks?

    Yes. AgentMail works natively with LangChain, LlamaIndex, and CrewAI, and provides official SDKs for Python and Node.js with full TypeScript support.

    How quickly can I send my first email?

    You can typically go from signup to sending your first email in under three minutes using a simple API key—domain verification is recommended for production.

    Get Started Free

    Join thousands of developers who are already using Agentmail to enhance their workflow and productivity.