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Best SeaMonkey Mail Alternatives in 2026

Updated

20 platforms from web browsers ranked against SeaMonkey Mail on the same published basis.

  1. 1
    Brave Browser Free plan Open sourceAndroidiOSLinuxMacWin $2.50/mo8.4
    SeaMonkey Mail vs Brave Browser
  2. 2
    Mozilla Firefox Free plan Open sourceAndroidextensioniOSLinuxMac Free8.3
    SeaMonkey Mail vs Mozilla Firefox
  3. 3
    Kameleo Free plan AndroidapiextensioniOSLinux €3.75/mo8.3
    SeaMonkey Mail vs Kameleo
  4. 4
    Waterfox Free plan Open sourceAndroidextensionLinuxMacWin $5/mo8.2
    SeaMonkey Mail vs Waterfox
  5. 5
    Mullvad Browser Free plan Open sourceLinuxMacWin Free8.2
    SeaMonkey Mail vs Mullvad Browser
  6. 6
    Tor Browser Free plan Open sourceAndroidLinuxMacWin Free8.1
    SeaMonkey Mail vs Tor Browser
  7. 7
    LibreWolf Free plan Open sourceLinuxMacWin Free8.1
    SeaMonkey Mail vs LibreWolf
  8. 8
    Helium Browser Free plan Open sourceWinMacLinux Free7.7
    SeaMonkey Mail vs Helium Browser
  9. 9
    Aloha Browser Free plan Open sourceWinMacLinuxiOSAndroid Free7.7
    SeaMonkey Mail vs Aloha Browser
  10. 10
    Google Chrome Free plan AndroidextensioniOSLinuxMac Free7.6
    SeaMonkey Mail vs Google Chrome
  11. 11
    Microsoft Edge Free plan AndroidextensioniOSLinuxMac Free7.6
    SeaMonkey Mail vs Microsoft Edge
  12. 12
    Opera Free plan AndroidextensioniOSLinuxMac $0.33/mo7.4
    SeaMonkey Mail vs Opera
  13. 13
    Vivaldi Free plan AndroidextensioniOSLinuxMac Free7.4
    SeaMonkey Mail vs Vivaldi
  14. 14
    DuckDuckGo Browser Free plan AndroidiOSMacWin $8.33/mo7.4
    SeaMonkey Mail vs DuckDuckGo Browser
  15. 15
    Avast Secure Browser Free plan extensionWeb $3.33/mo7.4
    SeaMonkey Mail vs Avast Secure Browser
  16. 16
    BrowserOS Free plan Open sourceMacWinLinux Free7.4
    SeaMonkey Mail vs BrowserOS
  17. 17
    Safari Free plan extensioniOSMac Free7.3
    SeaMonkey Mail vs Safari
  18. 18
    Comet Free plan AndroidiOSMacWin Free7.3
    SeaMonkey Mail vs Comet
  19. 19
    IronFox Open sourceAndroid 7.3
    SeaMonkey Mail vs IronFox
  20. 20
    ungoogled-chromium Free plan Open sourceWinMacLinuxAndroid Free7.3
    SeaMonkey Mail vs ungoogled-chromium

SeaMonkey Mail alternatives compared

#PlatformScoreFree planFromRuns on
1Brave Browser8.4Free plan$2.50/moAndroid, iOS, Linux, Mac, Windows
2Mozilla Firefox8.3Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
3Kameleo8.3Free plan€3.75/moAndroid, API, Browser, iOS, Linux, Mac, Web, Windows
4Waterfox8.2Free plan$5/moAndroid, Browser, Linux, Mac, Windows
5Mullvad Browser8.2Free planFreeLinux, Mac, Windows
6Tor Browser8.1Free planFreeAndroid, Linux, Mac, Windows
7LibreWolf8.1Free planFreeLinux, Mac, Windows
8Helium Browser7.7Free planFreeWindows, Mac, Linux
9Aloha Browser7.7Free planFreeWindows, Mac, Linux, iOS, Android
10Google Chrome7.6Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
11Microsoft Edge7.6Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
12Opera7.4Free plan$0.33/moAndroid, Browser, iOS, Linux, Mac, Web, Windows
13Vivaldi7.4Free planFreeAndroid, Browser, iOS, Linux, Mac, Windows
14DuckDuckGo Browser7.4Free plan$8.33/moAndroid, iOS, Mac, Windows
15Avast Secure Browser7.4Free plan$3.33/moBrowser, Web
16BrowserOS7.4Free planFreeMac, Windows, Linux
17Safari7.3Free planFreeBrowser, iOS, Mac
18Comet7.3Free planFreeAndroid, iOS, Mac, Windows
19IronFox7.3No—Android
20ungoogled-chromium7.3Free planFreeWindows, Mac, Linux, Android
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Questions about SeaMonkey Mail alternatives

What is the best alternative to SeaMonkey Mail?

Brave Browser, number 1 in web browsers with a score of 8.4 out of 10. The others here: Mozilla Firefox, Kameleo, Waterfox and 16 more.

What is the best free alternative to SeaMonkey Mail?

Brave Browser is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.

Is there an open-source alternative to SeaMonkey Mail?

Yes: Brave Browser, Mozilla Firefox, Waterfox and 8 more.

How are these alternatives ranked?

Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.