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Best SeaMonkey Mail Alternatives in 2026

Updated

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

  1. 1
    Mozilla Firefox Free plan Open sourceAndroidextensioniOSLinuxMac Free9.7
    SeaMonkey Mail vs Mozilla Firefox
  2. 2
    Brave Browser Free plan Open sourceAndroidiOSLinuxMacWin $2.50/mo9.7
    SeaMonkey Mail vs Brave Browser
  3. 3
    Waterfox Free plan Open sourceAndroidextensionLinuxMacWin $5/mo9.5
    SeaMonkey Mail vs Waterfox
  4. 4
    Tor Browser Free plan Open sourceAndroidLinuxMacWin Free9.4
    SeaMonkey Mail vs Tor Browser
  5. 5
    Mullvad Browser Free plan Open sourceLinuxMacWin Free9.3
    SeaMonkey Mail vs Mullvad Browser
  6. 6
    LibreWolf Free plan Open sourceLinuxMacWin Free9.3
    SeaMonkey Mail vs LibreWolf
  7. 7
    Aloha Browser Free plan Open sourceWinMacLinuxiOSAndroid Free9.1
    SeaMonkey Mail vs Aloha Browser
  8. 8
    Helium Browser Free plan Open sourceWinMacLinux Free9.0
    SeaMonkey Mail vs Helium Browser
  9. 9
    IronFox Free plan Open sourceAndroid Free8.9
    SeaMonkey Mail vs IronFox
  10. 10
    BrowserOS Free plan Open sourceextensionLinuxMacWin Free8.7
    SeaMonkey Mail vs BrowserOS
  11. 11
    ungoogled-chromium Free plan Open sourceWinMacLinuxAndroid Free8.7
    SeaMonkey Mail vs ungoogled-chromium
  12. 12
    Blanc Browser Free plan Open sourceMacWinLinux $4/mo8.6
    SeaMonkey Mail vs Blanc Browser
  13. 13
    Google Chrome Free plan AndroidextensioniOSLinuxMac Free8.4
    SeaMonkey Mail vs Google Chrome
  14. 14
    Microsoft Edge Free plan AndroidextensioniOSLinuxMac Free8.4
    SeaMonkey Mail vs Microsoft Edge
  15. 15
    MyIE Browser Free plan Open sourceWinLinuxiOSAndroid Free8.4
    SeaMonkey Mail vs MyIE Browser
  16. 16
    Opera Free plan AndroidextensioniOSLinuxMac $0.33/mo8.3
    SeaMonkey Mail vs Opera
  17. 17
    SPS Browser Pro Free plan Open sourceWin Free8.3
    SeaMonkey Mail vs SPS Browser Pro
  18. 18
    Vivaldi Free plan AndroidextensioniOSLinuxMac Free8.2
    SeaMonkey Mail vs Vivaldi
  19. 19
    Midori Browser Open sourceWinMacLinuxAndroidiOS 8.2
    SeaMonkey Mail vs Midori Browser
  20. 20
    SnowHaze Free plan Open sourceAndroidextensioniOS Free8.2
    SeaMonkey Mail vs SnowHaze

SeaMonkey Mail alternatives compared

#AppScoreFree planFromRuns on
1Mozilla Firefox9.7Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
2Brave Browser9.7Free plan$2.50/moAndroid, iOS, Linux, Mac, Windows
3Waterfox9.5Free plan$5/moAndroid, Browser, Linux, Mac, Windows
4Tor Browser9.4Free planFreeAndroid, Linux, Mac, Windows
5Mullvad Browser9.3Free planFreeLinux, Mac, Windows
6LibreWolf9.3Free planFreeLinux, Mac, Windows
7Aloha Browser9.1Free planFreeWindows, Mac, Linux, iOS, Android
8Helium Browser9.0Free planFreeWindows, Mac, Linux
9IronFox8.9Free planFreeAndroid
10BrowserOS8.7Free planFreeBrowser, Linux, Mac, Windows
11ungoogled-chromium8.7Free planFreeWindows, Mac, Linux, Android
12Blanc Browser8.6Free plan$4/moMac, Windows, Linux
13Google Chrome8.4Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
14Microsoft Edge8.4Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
15MyIE Browser8.4Free planFreeWindows, Linux, iOS, Android
16Opera8.3Free plan$0.33/moAndroid, Browser, iOS, Linux, Mac, Web, Windows
17SPS Browser Pro8.3Free planFreeWindows
18Vivaldi8.2Free planFreeAndroid, Browser, iOS, Linux, Mac, Windows
19Midori Browser8.2No—Windows, Mac, Linux, Android, iOS
20SnowHaze8.2Free planFreeAndroid, Browser, iOS
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Questions about SeaMonkey Mail alternatives

What is the best alternative to SeaMonkey Mail?

Mozilla Firefox, number 1 in web browsers with a score of 9.7 out of 10. The others here: Brave Browser, Waterfox, Tor Browser and 16 more.

What is the best free alternative to SeaMonkey Mail?

Mozilla Firefox 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: Mozilla Firefox, Brave Browser, Waterfox and 13 more.

How are these alternatives ranked?

Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.