Email Clients Software Directory

Giscus

A commenting system powered by GitHub Discussions. :octocat: :speech_balloon: :gem:

11.8K stars open source

Email Clients Web Components & Widgets

Inbox Zero

The world's best AI personal assistant for email. Open source app to help you reach inbox zero fast.

11.1K stars open source

Note Taking Email Clients

Mailpile

A free & open modern, fast email client with user-friendly encryption and privacy features

8.8K stars open source

Email Clients Privacy & Anonymity

Roundcube

Browser-based IMAP client with an application-like user interface.

7K stars open source

Email Clients

FairEmail

Fully featured, open source, privacy friendly email app for Android

4.4K stars open source

Email Clients Privacy & Anonymity

Flutter Responsive Email Ui Mobile Tablet And Web

We redesign the outlook app also make it responsive so that you can run it everywhere on your phone, tab, or web.

1.8K stars open source

Email Clients Mobile Development

Installer

A simple standalone program which automates the installation, removal and maintenance of BetterDiscord.

1.8K stars open source

Email Clients Utilities & System

Inbox

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 A replacement for outdated email technology and tools.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

1.7K stars open source

Email Clients Communication

Android

OwnTracks Android App

1.7K stars open source

File Sync & Share Home Automation Password Managers

Imap Backup

Backup and Migrate IMAP Email Accounts

1.7K stars open source

Backup Solutions Email Clients

SnappyMail

Simple, modern, lightweight & fast web-based email client (fork of RainLoop).

1.6K stars open source

Email Clients

Cypht

Feed reader for your email accounts.

1.6K stars open source

Email Clients Read-it-Later & RSS

Vladimiry/ElectronMail

Unofficial ProtonMail Desktop App

1.5K stars open source

Email Clients

Truemail

🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.

1.3K stars open source

Email Clients Developer Tools

Certbot Letencrypt Wildcardcertificates Alydns Au

certbot'renewing letencrypt certificate plugin - automatic verification aliyun/tencentyun/godaddy dns

1.2K stars open source

DNS & Domain Tools Email Clients

Anaconda

A Go client library for the Twitter 1.1 API

1.1K stars open source

API Tools Email Clients Social Networks & Fediverse

MailTrackerBlocker

Email tracker, read receipt and spy pixel blocker plugin for macOS Mail (10.11-13.x)

1.1K stars open source

Email Clients Privacy & Anonymity

Kurrier

Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.

971 stars open source

Email Clients Calendar & Scheduling

Mailur

Lightweight webmail inspired by Gmail

788 stars open source

Email Clients Email Servers

Agent Kit

Give Claude/Cursor email powers. 27 MCP tools — inbox, send, reply, contacts, search. Free, no signup.

691 stars open source

AI Agents Email Clients

Firefox Account Server

Host your own Firefox accounts server.

674 stars open source

SSO & Authentication Email Clients

Hehehai/voxt

🎙️Voice input and translation app for macOS. Press to talk, release to paste.

612 stars open source

Email Clients

Blog

Jiajun的编程随想

595 stars open source

CI / CD Web Development Traditional CMS

Webmail

JMAP Webmail built for the 21st Century. A modern, self-hosted email client for Stalwart Mail Server powered by the JMAP protocol. Email, calendar, contacts and files. Fast, privat... Read More

586 stars open source

Email Clients Calendar & Scheduling Communication

Email Clients Software & Alternatives

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