# Sylpheed review (2026): is it any good? > Lightweight desktop email client built on GTK+ Checked Nov 13, 2026 ยท graded Nov 13, 2026 by ToolGPA. Sylpheed is a lightweight desktop email client released under the GNU GPL. It is designed for keyboard-oriented use and runs on Windows, Linux, BSD, Mac OS X and other Unix-like systems. Its site lists filtering, search, junk mail control, GnuPG, SSL/TLS and plug-ins; the latest stable release shown is 3.7 from January 2018. - **Category:** Email Apps - **Made by:** Sylpheed - **Website:** https://sylpheed.sraoss.jp/en/ - **Runs on:** Windows, macOS, Linux - **Who should skip it:** Skip it if you want regular updates, as the latest stable release is from January 2018. - **Facts last checked:** Nov 13, 2026 ## Pricing As of Nov 13, 2026, Sylpheed is free to use. - **Pricing model:** Free - **Free plan:** Free to use, modify and redistribute under the GNU GPL. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | Free | $0 | Free software distributed under the GNU GPL; no paid plans. | Read from https://sylpheed.sraoss.jp/en/ on Nov 13, 2026. Prices change, so confirm with Sylpheed before buying. ## Key features - **One file per message:** Messages are stored one per file, which the site cites as a reason for reliability. - **Filtering and search:** The feature list names powerful filtering and search, plus junk mail control. - **Security:** Lists GnuPG and SSL/TLSv1 support, and a plug-in for automatic attachment encryption. - **Plug-ins:** Extensible through a plug-in system, with a plug-ins page and external command integration. - **Keyboard-oriented:** Built for keyboard operation as well as a conventional GTK+ interface for beginners. ## Good for - Users who want a small, plain desktop mail client - Older or low-powered computers where a light program helps ## Worth knowing - The latest stable release shown is 3.7 from 31 Jan 2018; 3.8beta1 dates from 14 Sep 2022. - The Sylpheed mailing list was announced as discontinued in September 2025. - No mobile apps are listed; the downloads cover desktop systems. ## ToolGPA grades **GPA: 2.8 out of 4**, graded Nov 13, 2026. Sylpheed is a free desktop mail client on GTK+ that keeps one file per message and has filters, search and plug-ins. The latest stable release is from January 2018, and its mailing list was announced as discontinued in September 2025. - **Value for money: A.** Free under the GNU GPL, with nothing to host. - **Free plan and trial: A.** Free under the GNU GPL, with no paid plans and no limits on the program. - **Features: C.** Filtering, search, GnuPG and plug-ins for the basics of mail. The last stable release is 3.7 from 2018, so don't expect new features. - **Ease of use: C.** No store rating on record. You add each account yourself, and the interface is old but plain. - **Platforms and integrations: C.** Windows, macOS and Linux, but nothing on phones or the web. A program for computers alone. These are ToolGPA's own grades. Graded from this listing, whose facts were read from the Sylpheed project's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among email apps - Sylpheed's GPA of 2.8 is higher than 88 of the 122 other email apps we grade, and level with 11. - It stands best on free plan and trial (A, above 97 of 122) and worst on features (C, above 1). - Sylpheed has no paid plan. - On features, ease of use and platforms it scores 2.0 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price. The category's chart of price against score: https://toolgpa.com/charts/email ## Keep it, or make your own? **Keep it.** Sylpheed is free, so making your own would save you nothing. And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 2.8 is higher than 88 of the 122 other email apps we grade. - You could not: An email client: sending, receiving, threading and searching years of mail. - You could not: Filters that read every message as it arrives. - You could not: Apps for macOS, Windows and Linux that stay in step with each other. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with GnuPG, SylFilter **Tags:** Email client, Open source, Keyboard-first, Inbox filtering ## Alternatives - [Claws Mail](https://toolgpa.com/tools/claws-mail): Lightweight GTK email and news client, free under the GPL. [Compare](https://toolgpa.com/compare/claws-mail-vs-sylpheed) - [Thunderbird](https://toolgpa.com/tools/thunderbird): Free, open-source email app for Windows, macOS, Linux and Android. [Compare](https://toolgpa.com/compare/sylpheed-vs-thunderbird) - [Mailspring](https://toolgpa.com/tools/mailspring): Open-source desktop email client for Mac, Windows and Linux. [Compare](https://toolgpa.com/compare/mailspring-vs-sylpheed) - [NeoMutt](https://toolgpa.com/tools/neomutt): Command-line mail reader forked from Mutt with extra features. [Compare](https://toolgpa.com/compare/neomutt-vs-sylpheed) - [Evolution](https://toolgpa.com/tools/evolution): GNOME's free mail, calendar and address book app. [Compare](https://toolgpa.com/compare/evolution-vs-sylpheed) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 13, 2026: - https://sylpheed.sraoss.jp/en/ Page: https://toolgpa.com/tools/sylpheed Listed by ToolGPA (toolgpa.com).