Choosing an email client means balancing everyday usability with evidence that the project is still healthy and shipping. ToolVitals combines repository and release signals into health, shipping, and overall scores; the supplied July 2026 scores and ordering are used here unchanged.
This ranking includes only open or source-visible tools and sorts them by ToolVitals score first. GitHub stars serve only as a secondary popularity signal, including the tie-break between Mailspring and neomutt at 85 points.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | matcha | OSI-approved OSS | MIT | 77 | 94 | 1032 | 86 | 🟢 Excellent |
| 2 | Mailspring | OSI-approved OSS | GPL-3.0 | 87 | 76 | 17705 | 85 | 🟢 Excellent |
| 3 | neomutt | OSI-approved OSS | GPL-2.0 | 83 | 77 | 3785 | 85 | 🟢 Excellent |
| 4 | FreshRSS | OSI-approved OSS | AGPL-3.0 | 81 | 76 | 0 | 83 | 🟢 Excellent |
| 5 | NeoMD | OSI-approved OSS | MIT | 81 | 72 | 264 | 82 | 🟢 Excellent |
| 6 | Mail0 | OSI-approved OSS | MIT | 38 | 0 | 10740 | 38 | 🔴 Needs Attention |
Top 3 Highlights
matcha ranks first with a ToolVitals score of 86 and the group’s highest shipping score at 94. Its first-party repository describes a Go email client built with the Bubble Tea framework for reading and sending email from a terminal. It is labeled OSI-approved OSS under the MIT license.
Mailspring ranks second with a ToolVitals score of 85, the highest health score in the group at 87, and 17,705 GitHub stars. Its official site presents a desktop client for Mac, Windows, and Linux with multiple-account support, a unified inbox, cross-account search, and support for major providers and IMAP/SMTP. It is labeled OSI-approved OSS under the GPL-3.0 license.
neomutt ranks third with a ToolVitals score of 85, a health score of 83, and a shipping score of 77. Its official guide documents a terminal email workflow covering reading, sending, forwarding, postponed mail, encryption and signing, configurable key bindings, hooks, message patterns, and multiple mailbox formats. It is labeled OSI-approved OSS under the GPL-2.0 license.
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