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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 Free7.4
    AI Email Assistant for Thunderbird vs WPS AI Email Writer
  2. 2
    WriteMail.ai Free plan AndroidextensioniOSMacWeb $5/mo7.4
    AI Email Assistant for Thunderbird vs WriteMail.ai
  3. 3
    AI Perfect Assistant Free plan AndroidextensioniOSWebWin $16.99/mo7.2
    AI Email Assistant for Thunderbird vs AI Perfect Assistant
  4. 4
    ForthWrite Free plan apiextensionMacWebWin $24/mo7.1
    AI Email Assistant for Thunderbird vs ForthWrite
  5. 5
    Kerna Free plan MacWebWin €12/mo7.1
    AI Email Assistant for Thunderbird vs Kerna
  6. 6
    Ellie Free plan extensionWebWin $19/mo7.0
    AI Email Assistant for Thunderbird vs Ellie
  7. 7
    GPT for Gmail Free plan AndroidextensioniOSWeb $9/mo7.0
    AI Email Assistant for Thunderbird vs GPT for Gmail
  8. 8
    Jetwriter AI Free plan extensionWeb $14/mo6.9
    AI Email Assistant for Thunderbird vs Jetwriter AI
  9. 9
    Lavender Free plan extensionWeb $27/mo6.9
    AI Email Assistant for Thunderbird vs Lavender
  10. 10
    MailMaestro Free plan extensionWeb $12/mo6.9
    AI Email Assistant for Thunderbird vs MailMaestro
  11. 11
    Flailo Free plan apiWeb $29/mo6.8
    AI Email Assistant for Thunderbird vs Flailo
  12. 12
    MailSome Free plan extensionWeb €8.25/mo6.8
    AI Email Assistant for Thunderbird vs MailSome
  13. 13
    Workforce AI Email Drafter Free plan Web $99/mo6.8
    AI Email Assistant for Thunderbird vs Workforce AI Email Drafter
  14. 14
    Composer AI Free plan extensionWeb Free6.7
    AI Email Assistant for Thunderbird vs Composer AI
  15. 15
    ReplyCalm Free plan Web $9/mo6.7
    AI Email Assistant for Thunderbird vs ReplyCalm
  16. 16
    Xemail AndroidiOSWeb $5.83/mo6.7
    AI Email Assistant for Thunderbird vs Xemail
  17. 17
    Maillifier Free plan self-hostedWeb Free6.6
    AI Email Assistant for Thunderbird vs Maillifier
  18. 18
    Mailyr Free plan extension $4.90/mo6.6
    AI Email Assistant for Thunderbird vs Mailyr
  19. 19
    OpenReply Free plan extension Free6.6
    AI Email Assistant for Thunderbird vs OpenReply
  20. 20
    thread. Free plan extension Free6.6
    AI Email Assistant for Thunderbird vs thread.

AI Email Assistant for Thunderbird alternatives compared

#AppScoreFree planFromRuns on
1WPS AI Email Writer7.4Free planFreeAndroid, iOS, Linux, Mac, Web, Windows
2WriteMail.ai7.4Free plan$5/moAndroid, Browser, iOS, Mac, Web, Windows
3AI Perfect Assistant7.2Free plan$16.99/moAndroid, Browser, iOS, Web, Windows
4ForthWrite7.1Free plan$24/moAPI, Browser, Mac, Web, Windows
5Kerna7.1Free plan€12/moMac, Web, Windows
6Ellie7.0Free plan$19/moBrowser, Web, Windows
7GPT for Gmail7.0Free plan$9/moAndroid, Browser, iOS, Web
8Jetwriter AI6.9Free plan$14/moBrowser, Web
9Lavender6.9Free plan$27/moBrowser, Web
10MailMaestro6.9Free plan$12/moBrowser, Web
11Flailo6.8Free plan$29/moAPI, Web
12MailSome6.8Free plan€8.25/moBrowser, Web
13Workforce AI Email Drafter6.8Free plan$99/moWeb
14Composer AI6.7Free planFreeBrowser, Web
15ReplyCalm6.7Free plan$9/moWeb
16Xemail6.7No$5.83/moAndroid, iOS, Web
17Maillifier6.6Free planFreeself-hosted, Web
18Mailyr6.6Free plan$4.90/moBrowser
19OpenReply6.6Free planFreeBrowser
20thread.6.6Free 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 7.4 out of 10. The others here: WriteMail.ai, AI Perfect Assistant, ForthWrite 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. 19 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on.