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Ranked under Top · All Time

  1. 438

    Resend

    Developer-focused email API for transactional mail, with React email templates and built-in deliverability.

    Serviceresend.comFreemium

    @resend · Developer Tools

  2. 2640

    eusend

    Transactional and broadcast email API whose sending infrastructure is hosted entirely in the EU.

    Serviceeusend.dev

    Developer Tools

  3. 1816

    AgentMail

    Email inbox API built for AI agents, letting them create inboxes, receive mail, and extract 2FA codes.

    Servicewww.agentmail.toFreemium

    agentmail-to · AI Agents

  4. 4405

    mxRaven

    Programmable email platform with SMTP routing rules, inbound auth verdicts and SDKs, shown in a public sandbox.

    Servicesandbox.mxraven.com

    Developer Tools

  5. 1461

    DearAgent

    Gives AI agents their own self-hosted email inbox on Cloudflare, with an MCP server included.

    Servicegithub.com/panda-sandeep/dearagentOpen Source

    Developer Tools

  6. 473

    SendGrid

    Email API from Twilio for delivering transactional and marketing messages at scale.

    Servicesendgrid.comFreemium

    Developer Tools

  7. 4056

    tempmailboxes

    Receive-only disposable email with public mailboxes, private paid inboxes and an API for verification codes

    Servicetempmailboxes.comFreemium

    Developer Tools

  8. 1944

    Emailclaw

    A local-first AI agent that treats each email thread's subject line as an isolated project with its own workspace.

    Agentgithub.com/emailclaw/emailclawOpen Source

    AI Agents

  9. 3951

    Mailgun

    Transactional email API offering deliverability tooling, inbound message routing, and address validation.

    Servicewww.mailgun.comPaid

    @Mail_Gun · Developer Tools

  10. 3329

    brrr

    Push notification service for iOS and macOS that sends custom alerts to yourself via a simple webhook.

    Servicebrrr.nowPaid

    @simonbs · Developer Tools

  11. 1434

    Linq

    Messaging APIs that let businesses build conversational experiences over native iMessage, RCS, SMS, and voice.

    Servicelinqapp.comPaid

    @elliott__potter · Developer Tools

  12. 2030

    Groundhog

    Catches app emails over SMTP and several provider send APIs in a local web inbox.

    Applicationgithub.com/groundmail/groundhogOpen Source

    Developer Tools

  13. 1309

    Wraps

    Deploys event tracking, bounce handling and a dashboard for Amazon SES into your own AWS account.

    Infrastructurewraps.devOpen Source

    Developer Tools

  14. 4113

    AWS SES

    AWS email service for transactional and marketing sending where you handle deliverability tooling yourself.

    Serviceaws.amazon.comPaid

    @awscloud · Developer Tools

  15. 3094

    Agent Inbox

    MCP server that hands AI agents disposable email inboxes for verification, auth flows, and testing.

    MCP Serverhttps://github.com/gsd-build/agent-inboxOpen Source

    gsd-build · AI Agents

  16. 3883

    Inbound

    Email API that receives, parses, routes and replies in thread, with an API and CLI for agent mailboxes.

    Serviceinbound.newPaid

    Developer Tools

  17. 3286

    AgentMail

    Messaging service where AI agents exchange messages over temporary channels that expire within 24 hours.

    Servicesay-hi.toFree

    @EastlondonDev · AI Agents

  18. 1389

    mailrelay

    Self-hosted SMTP server that matches incoming email against rules and forwards matches to webhooks.

    Servicegithub.com/gowthamgts/mailrelayOpen Source

    Developer Tools

  19. 2841

    Resend MCP Server

    Official MCP server for sending transactional email and managing contacts, broadcasts, and domains through Resend.

    MCP Servergithub.com/resend/resend-mcpOpen Source

    resend · Developer Tools

  20. 3792

    openmsg

    Lets Claude Code, Codex, and OpenCode sessions send each other messages while running.

    github.com/marciob/openmsgOpen Source

    AI Agents

  21. 1428

    Poke

    Proactive assistant that turns emails into actionable tasks and manages communication across messaging channels.

    Agentpoke.comFreemium

    @interaction · AI Agents

  22. 2226

    Loops

    Email platform handling both marketing campaigns and transactional sends, designed around SaaS companies.

    Serviceloops.soPaid

    @loops · Developer Tools

  23. 998

    agmsg

    Messaging layer letting CLI coding agents from different vendors talk to each other via a shared local SQLite database.

    Utilitygithub.com/fujibee/agmsgOpen Source

    @izutorishima · AI Agents

  24. 3028

    gmcli

    Minimal Gmail CLI for reading, searching, sending, and triaging your inbox from the terminal.

    Utilityhttps://github.com/badlogic/gmcliOpen Source

    badlogic · Productivity

  25. 609

    Postmark

    Transactional email service with separate streams for transactional and broadcast mail, focused on inbox placement.

    Servicepostmarkapp.comPaid

    @postmarkapp · Developer Tools

  26. 2268

    MergeMe

    One updating Slack card per PR/MR with threaded comments, CI status, and stale-PR reminders.

    Applicationmergeme.dev

    Developer Tools

  27. 1510

    eze

    Self-hosted service that turns an uploaded HTML folder into a private, company-only site with a built-in SDK.

    Infrastructureeze.pageOpen Source

    Developer Tools

  28. 1549

    Open-Dispatch

    Self-hostable API and dashboard that posts one content payload to seven social platforms in a single HTTP call.

    Applicationgithub.com/matthew-selvam/open-dispatchOpen Source

    matthew-selvam · Developer Tools

  29. 2403

    Pidgeon

    API and SDKs that give each AI agent its own email inbox with threads, webhooks and a firewall

    pidgeon.ai

    Developer Tools

  30. 617

    imsg

    macOS command-line tool that scripts Messages.app to send, receive, and stream iMessages and SMS for automation.

    Utilitygithub.com/steipete/imsgOpen Source

    @steipete · Developer Tools