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About SeaMonkey
An all-in-one internet suite: browser, mail and composer.
Built for Windows, SeaMonkey brings solid browsers features together in a clean, no-nonsense package. You get browser + email and html composer out of the box, with no bloat and no sign-up.
Get SeaMonkey for Windows now: the current version, a clean installer and a fast, direct download.
Key features
- ✓Browser + email
- ✓HTML composer
- ✓IRC chat
- ✓Mozilla-based
Requirements
Windows 10 / 11, 64-bit
SeaMonkey — frequently asked questions
Is SeaMonkey free to download?+
Yes. SeaMonkey is free and open source, so you can use it at no cost.
Is SeaMonkey safe to download?+
Yes. HivApps links to the latest SeaMonkey build and keeps listings clean, with no bundled extras. As always, keep your antivirus on and only install software you trust.
What is the latest version of SeaMonkey?+
The latest version listed here is SeaMonkey 2.53, updated Aug 9, 2026.
What do I need to run SeaMonkey?+
Windows 10 / 11, 64-bit
How do I install SeaMonkey on Windows?+
Click the Download button on this page, run the installer once it finishes downloading, and follow the on-screen setup steps.
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Latest version (2.53) · Safe & clean