LibreWolf vs SeaMonkey (2026): which should you pick?
As of Nov 13, 2026, SeaMonkey grades higher than LibreWolf: 3.0 against 2.8 out of 4.0.
Checked Nov 12, 2026 and Nov 13, 2026 · graded Nov 12, 2026 and Nov 13, 2026 by ToolGPA
SeaMonkey grades higher on ease of use. They get the same grade on value for money, the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
SeaMonkey
All-in-one internet suite with browser, mail, chat and HTML editor
Free
Which one is for you
Pick LibreWolf if
- Fits if you want Firefox without telemetry and with tracking blocked from the start
- Works for people who don't mind adjusting settings to get a site working
Look elsewhere if
- Not for you if you stream from DRM services, because DRM is disabled by design
- Watch out: cookies are cleared on close, so sites will log you out each time
- Not for you if you want it on your phone, as there's no Android version
- Watch out: it's maintained by volunteers and takes no donations
Pick SeaMonkey if
- Fits if you want browser, mail and IRC in one desktop program
- Makes sense if you read newsgroups or edit HTML pages by hand
Look elsewhere if
- Skip it if you want a phone version, as the site offers no iOS or Android edition
- Not for you if you use an Apple silicon Mac, since only an x64 macOS build is listed
- Watch out: the current release listed is 2.53.24, built on the Gecko engine
- Too heavy if you only want to browse, since mail, chat and editor come along
How we grade them
| 2.8GPALibreWolfGood | 3.0GPASeaMonkeyVery good | |
|---|---|---|
| Value for money | AFree and open source, and a program anyone can download and run. The FAQ says the project takes no donations. | AFree, with donations and sponsors accepted and no paid plan, so it undercuts this category's $7 cheapest quarter. |
| Free plan and trial | AThe whole browser is free, with uBlock Origin already installed. | AThe whole suite for Windows, macOS and Linux downloads at no charge, in 20-plus languages. |
| Features | CNo telemetry, strict tracking protection, cookies cleared on close and fingerprint resistance. The gaps are written into the design: DRM is disabled, so DRM-protected video services won't play. | CBrowser, mail and news, feeds, IRC and an HTML editor in one program, built on Gecko. The browser itself is the same size of job as any other. |
| Ease of use | CNo store rating on record. The hardening settings can log you out or break pages until you adjust them, so expect some tweaking. | BNo rating on record. It is a program you install and start using, though a suite has more parts than a lone browser. |
| Platforms and integrations | CWindows, Mac and Linux only. The FAQ says no one currently provides an Android version. | CWindows x64 and x86, macOS x64 and Linux x64 and x86 builds, with no Android or iOS edition. |
| Best for | a privacy-hardened Firefox | an all-in-one browser, mail and chat suite |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: LibreWolf and SeaMonkey. How we grade
Price against what you get
LibreWolf has no paid plan and scores 2.0 out of 4 on features, ease of use and platforms. SeaMonkey has no paid plan and scores 2.3.
SeaMonkey scores higher for the same starting price. Of the other browsers on the chart, none scores higher than LibreWolf for less, and none scores higher than SeaMonkey for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- LibreWolf also covers ad and tracker blocking.
- SeaMonkey also covers email client and rSS reader.
In commonFree planWindowsmacOSLinuxOpen sourceWeb browser
At a glance
| LibreWolf | SeaMonkey | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | LibreWolf is free and open source. The FAQ says the project does not accept donations. | SeaMonkey is free; the site accepts donations and sponsors and lists no paid plan. |
| Free trial | None listed | None listed |
| macOS | ||
| Windows | ||
| Linux | ||
| Made by | LibreWolf community | SeaMonkey Association |
| Price read from | librewolf.net | seamonkey-project.org |
| Checked | Nov 12, 2026 | Nov 13, 2026 |
Worth knowing
LibreWolf
- DRM is disabled by design, so DRM-protected video services will not play.
- Resist-fingerprinting and cookie clearing can log you out of sites or break some pages until you adjust the settings.
- The FAQ says no one currently provides an Android version.
- It is maintained by volunteers and takes no donations.
SeaMonkey
- The listed macOS build is x64 only; no ARM-specific macOS build is shown.
- It is run by a community council, and the about page says it describes the only full internet suite still developed.
- The current release listed is 2.53.24, built on the Gecko engine.
- The site offers no iOS or Android edition.
Key features
LibreWolf
- No telemetry
- The project states that it removes telemetry, data collection and experiments from the Firefox base.
- uBlock Origin included
- uBlock Origin comes installed with custom default filter lists, alongside Firefox's tracking protection set to strict.
- Anti-fingerprinting defaults
- It turns on resist-fingerprinting, reports the language as en-US to sites and disables WebGL, a common fingerprinting source.
- Cookies cleared on close
- Cookies and site data are deleted when the browser closes by default, and Total Cookie Protection is enabled.
- Privacy-oriented search engines
- The default search list includes DuckDuckGo and Searx rather than Google.
- Follows Firefox releases
- It is built from the latest Firefox stable source, so security fixes arrive with Firefox's own.
SeaMonkey
- Browser
- An Internet browser built on Gecko, the same code behind Thunderbird and the base of Firefox.
- Email and newsgroups
- A built-in mail and newsgroup client, plus feed reading, per the site's one-line description.
- IRC chat
- Chat is included in the same application as the browser and mail.
- HTML editor and web development tools
- An HTML editor and web development tools are part of the suite.
- Multiple languages and platforms
- The download table lists Windows x64 and x86, macOS x64, and Linux x64 and x86 builds in many languages.
Plans
LibreWolf
Free$0
The full browser for Windows, macOS and Linux, with uBlock Origin included.
SeaMonkey
Free$0
The full suite for Windows, macOS and Linux, in 20-plus languages.
Common questions
Which is cheaper, LibreWolf or SeaMonkey?
As of Nov 13, 2026, both LibreWolf and SeaMonkey are free to use.
Which has a free plan, LibreWolf or SeaMonkey?
As of Nov 13, 2026, both LibreWolf and SeaMonkey have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.