Alternatives · Browsers

SeaMonkey alternatives

As of Nov 13, 2026, the best SeaMonkey alternative for most people is Firefox (3.8 GPA), third in our ranking of browsers. It's also the best free one.

SeaMonkey compared with 6 alternatives: Firefox, Pale Moon, Waterfox, LibreWolf, Floorp and 1 more.

SeaMonkey is free to use. All 6 alternatives are free or have a free plan.

Listings checked up to Nov 13, 2026 · Where the facts come from

At a glance

Tool	Price	Free plan	Runs on
SeaMonkeyThis tool	Free	Free	macOS, Windows, Linux
Firefox	Free	Free	macOS, Windows, Linux, iOS, Android
Pale Moon	Free	Free	macOS, Windows, Linux
Waterfox	Free	Free	macOS, Windows, Linux, Android
LibreWolf	Free	Free	macOS, Windows, Linux
Floorp	Free	Free	macOS, Windows, Linux
Otter Browser	Free	Free	Windows, Linux

Price against what you get

SeaMonkey has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. None of the 6 alternatives on this chart both scores higher and starts lower.

Firefox, Waterfox and Floorp score higher without starting lower.

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

The full chart of browsers, and the best at every price

How each one differs from SeaMonkey

Firefox
Free, open-source browser from Mozilla with tracker blocking built in
- Firefox is free.
- Firefox also lists Android and iOS apps.
- Firefox is end-to-end encrypted, according to its own site.
- Firefox also covers password manager.
- Firefox does not cover email client and rSS reader, which SeaMonkey does.
Suits: People who want tracker blocking switched on by default
Firefox vs SeaMonkey Firefox pricing and details
Pale Moon
Free open-source browser on its own Goanna engine, with legacy add-ons
- Pale Moon is free.
- Pale Moon does not cover email client and rSS reader, which SeaMonkey does.
Suits: People who want deep add-on and theme customization
Pale Moon vs SeaMonkey Pale Moon pricing and details
Waterfox
Free, open-source Firefox-based browser with a built-in ad blocker
- Waterfox is free.
- Waterfox also lists an Android app.
- Waterfox also covers ad and tracker blocking.
- Waterfox does not cover email client and rSS reader, which SeaMonkey does.
Suits: Firefox users who want an ad blocker built in
Waterfox vs SeaMonkey Waterfox pricing and details
LibreWolf
Free, privacy-hardened browser built on Firefox
- LibreWolf is free.
- LibreWolf also covers ad and tracker blocking.
- LibreWolf does not cover email client and rSS reader, which SeaMonkey does.
Suits: Firefox users who want strict privacy defaults without changing settings by hand
LibreWolf vs SeaMonkey LibreWolf pricing and details
Floorp
Free, open-source Firefox-based browser with workspaces and split view
- Floorp is free.
- Floorp does not cover email client and rSS reader, which SeaMonkey does.
Suits: Firefox users who want workspaces and split view built in
Floorp vs SeaMonkey Floorp pricing and details
Otter Browser
Open-source Qt browser that revives the classic Opera 12 interface
- Otter Browser is free.
- Otter Browser lists no macOS app, which SeaMonkey has.
- Otter Browser does not cover email client and rSS reader, which SeaMonkey does.
Suits: People who miss the classic Opera 12 interface
Otter Browser vs SeaMonkey Otter Browser pricing and details

Limits worth knowing in 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.

SeaMonkey pricing and details

Common questions

What are the alternatives to SeaMonkey?

The alternatives to SeaMonkey in this directory are Firefox, Pale Moon, Waterfox, LibreWolf, Floorp and Otter Browser. Each one has a side-by-side comparison with SeaMonkey.

Is there a free alternative to SeaMonkey?

Yes. Firefox, Pale Moon, Waterfox, LibreWolf, Floorp and Otter Browser are free to use.

Which SeaMonkey alternatives work on Android?

The SeaMonkey listing does not include an Android app. Firefox and Waterfox list one.

Which SeaMonkey alternatives work on iOS?

The SeaMonkey listing does not include an iOS app. Firefox lists one.

When were these prices checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices without notice, so confirm on their site before you buy.

How this page was made

Where any alternative here is in our top three browsers, the best for most people is the highest placed of them: the top three weigh who each tool suits as well as its grades. Otherwise the page names the highest-graded alternative in the same category as SeaMonkey, the one its listing names first winning a tie. The best free one is the highest-graded alternative that is free or has a free plan (a free trial does not count), with its catch quoted from its listing where the listing states a short one. The GPA is the average of our five grades for each tool.
The alternatives are the tools SeaMonkey’s listing names as its closest substitutes, and the tools whose listings name SeaMonkey.
Prices, plans and platforms come from each tool’s listing, which names the pages they were read from.
The differences are worked out from those listings.
The chart sets each tool’s starting price against our own grades for features, ease of use and platforms.

Read the method All browsers