Novu alternatives for AI agents.

Modern email for teams and professionals. A replacement for outdated email technology and tools. Alt to hey.com, front.com, missiveapp.com

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

Prometheus Alertmanager

💌 Build and send emails using React

Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

The Official Twilio SendGrid Led, Community Driven Node.js API Library

JavaScript plugin for finding links in plain-text and converting them to HTML <a> tags.

Notifications for Ruby on Rails applications

Upyo is a simple and cross-runtime library for sending email messages using SMTP and various email providers. It works on Node.js, Deno, Bun, and edge functions.

Open source alternative to Resend, Sendgrid, Postmark etc.

A cute temporary email service built with NextJS + Cloudflare technology stack 🎉 | 一个基于 NextJS + Cloudflare 技术栈构建的可爱临时邮箱服务🎉

Open-source customer engagement. Automate transactional and marketing messages across email, SMS, mobile push, WhatsApp, Slack, and more 📨

Bichon – A lightweight, high-performance Rust email archiver with WebUI