Communication
Email Clients & Webmail
Email clients and webmail interfaces for reading, organizing, and sending email across one or more inboxes.
Best Email Clients & Webmail tools by public signals
These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.
Use Case Rankings
Ordered by ToolVitals score, then health, shipping, confidence, GitHub stars, and name.
| # | Tool | Health | Shipping | Openness | Stars | Score | Status |
|---|---|---|---|---|---|---|---|
| 01 | Inbox Zero The world's best AI personal assistant for email. Open source app to help you reach inbox zero fast. | 97 | 97 | OSI-approved OSS | 12.8k | 97 | Active |
| 02 | Bulwark Mail Self-hosted JMAP webmail client for modern mail servers. | 97 | 97 | OSI-approved OSS | 1.3k | 97 | Active |
| 03 | Mailflow Self-hosted unified webmail client. | 97 | 97 | OSI-approved OSS | 589 | 97 | Active |
| 04 | thunderbird-android Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail) | 96 | 97 | OSI-approved OSS | 14.1k | 97 | Active |
| 05 | eGroupware Web-based groupware server for calendars, contacts, webmail, and project collaboration. | 95 | 97 | OSI-approved OSS | 299 | 96 | Active |
| 06 | Mailspring :love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux. | 96 | 94 | OSI-approved OSS | 17.9k | 95 | Active |
| 07 | FreshRSS A free, self-hostable news aggregator… | 96 | 93 | OSI-approved OSS | 16.4k | 95 | Active |
| 08 | NeoMD Minimal email TUI where you read with Markdown and write in Neovim. | 87 | 90 | OSI-approved OSS | 279 | 88 | Active |
| 09 | FairEmail Fully featured, privacy-friendly email app for Android. | 86 | 91 | OSI-approved OSS | 4.7k | 88 | Active |
| 10 | neomutt ✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat | 90 | 83 | OSI-approved OSS | 3.9k | 87 | Active |
| 11 | matcha A beautiful and functional email client for your terminal, built with Go and the charming Bubble Tea TUI library. Never leave your command line to check your inbox or send an email again! | 80 | 68 | OSI-approved OSS | 1.1k | 75 | Active |
| 12 | Afterlogic Webmail Lite 8 Open-source webmail client for existing IMAP servers. | 72 | 65 | OSI-approved OSS | 363 | 69 | Warning |
| 13 | Mail0 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 | 61 | 42 | OSI-approved OSS | 10.9k | 54 | Warning |
Not Scored
Tracked for context, but excluded from rankings because comparable open/source-visible evidence is unavailable.