Explore open-source tools in Email & Communication.

All in one notification infrastructure for developers

Secure and scalable mail server with JMAP, IMAP, and SMTP support

Take control of your inbox with smart automation

Fast and private email client built for a clutter free inbox

Free and open source instant messaging and VoIP platform

Simple open source help desk for seamless customer support

A minimal email client built for focus and speed

Feature rich unofficial desktop client for ProtonMail services

Decentralized and encrypted peer to peer email client

Self-hosted AI-powered email inbox using Cloudflare domains

Secure cross-platform email with post-quantum encryption

AI powered local first desktop email client for Gmail