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Best AI Email Assistant for Thunderbird Alternatives in 2026

Updated

20 apps from AI email writing tools ranked against AI Email Assistant for Thunderbird on the same published basis.

  1. 1
    WPS AI Email Writer Free plan AndroidiOSLinuxMacWeb Free6.7
    AI Email Assistant for Thunderbird vs WPS AI Email Writer
  2. 2
    WriteMail.ai Free plan AndroidextensioniOSMacWeb $5/mo6.7
    AI Email Assistant for Thunderbird vs WriteMail.ai
  3. 3
    AI Perfect Assistant Free plan AndroidextensioniOSWebWin $16.99/mo6.6
    AI Email Assistant for Thunderbird vs AI Perfect Assistant
  4. 4
    Kerna Free plan MacWebWin €12/mo6.6
    AI Email Assistant for Thunderbird vs Kerna
  5. 5
    Ellie Free plan extensionWebWin $19/mo6.5
    AI Email Assistant for Thunderbird vs Ellie
  6. 6
    ForthWrite Free plan apiextensionMacWebWin $24/mo6.5
    AI Email Assistant for Thunderbird vs ForthWrite
  7. 7
    GPT for Gmail Free plan AndroidextensioniOSWeb $9/mo6.5
    AI Email Assistant for Thunderbird vs GPT for Gmail
  8. 8
    Demi Free plan Mac $25/mo6.4
    AI Email Assistant for Thunderbird vs Demi
  9. 9
    Flailo Free plan apiWeb $29/mo6.4
    AI Email Assistant for Thunderbird vs Flailo
  10. 10
    Jetwriter AI Free plan extensionWeb $14/mo6.4
    AI Email Assistant for Thunderbird vs Jetwriter AI
  11. 11
    Lavender Free plan extensionWeb $27/mo6.4
    AI Email Assistant for Thunderbird vs Lavender
  12. 12
    MailMaestro Free plan extensionWeb $12/mo6.4
    AI Email Assistant for Thunderbird vs MailMaestro
  13. 13
    MailSome Free plan extensionWeb €8.25/mo6.4
    AI Email Assistant for Thunderbird vs MailSome
  14. 14
    ReplyCalm Free plan Web $9/mo6.4
    AI Email Assistant for Thunderbird vs ReplyCalm
  15. 15
    Workforce AI Email Drafter Free plan Web $99/mo6.4
    AI Email Assistant for Thunderbird vs Workforce AI Email Drafter
  16. 16
    Composer AI Free plan extensionWeb Free6.3
    AI Email Assistant for Thunderbird vs Composer AI
  17. 17
    Maillifier Free plan self-hostedWeb Free6.3
    AI Email Assistant for Thunderbird vs Maillifier
  18. 18
    Mailyr Free plan extension $4.90/mo6.3
    AI Email Assistant for Thunderbird vs Mailyr
  19. 19
    OpenReply Free plan extension Free6.3
    AI Email Assistant for Thunderbird vs OpenReply
  20. 20
    thread. Free plan extension Free6.3
    AI Email Assistant for Thunderbird vs thread.

AI Email Assistant for Thunderbird alternatives compared

#AppScoreFree planFromRuns on
1WPS AI Email Writer6.7Free planFreeAndroid, iOS, Linux, Mac, Web, Windows
2WriteMail.ai6.7Free plan$5/moAndroid, Browser, iOS, Mac, Web, Windows
3AI Perfect Assistant6.6Free plan$16.99/moAndroid, Browser, iOS, Web, Windows
4Kerna6.6Free plan€12/moMac, Web, Windows
5Ellie6.5Free plan$19/moBrowser, Web, Windows
6ForthWrite6.5Free plan$24/moAPI, Browser, Mac, Web, Windows
7GPT for Gmail6.5Free plan$9/moAndroid, Browser, iOS, Web
8Demi6.4Free plan$25/moMac
9Flailo6.4Free plan$29/moAPI, Web
10Jetwriter AI6.4Free plan$14/moBrowser, Web
11Lavender6.4Free plan$27/moBrowser, Web
12MailMaestro6.4Free plan$12/moBrowser, Web
13MailSome6.4Free plan€8.25/moBrowser, Web
14ReplyCalm6.4Free plan$9/moWeb
15Workforce AI Email Drafter6.4Free plan$99/moWeb
16Composer AI6.3Free planFreeBrowser, Web
17Maillifier6.3Free planFreeself-hosted, Web
18Mailyr6.3Free plan$4.90/moBrowser
19OpenReply6.3Free planFreeBrowser
20thread.6.3Free planFreeBrowser
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Questions about AI Email Assistant for Thunderbird alternatives

What is the best alternative to AI Email Assistant for Thunderbird?

WPS AI Email Writer, number 1 in AI email writing tools with a score of 6.7 out of 10. The others here: WriteMail.ai, AI Perfect Assistant, Kerna and 16 more.

What is the best free alternative to AI Email Assistant for Thunderbird?

WPS AI Email Writer is the best-ranked alternative with a free plan. 20 of the 20 alternatives here publish a free plan on their own pricing pages.

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.