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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
    WriteMail.ai Free plan AndroidextensioniOSMacWeb $5/mo7.9
    AI Email Assistant for Thunderbird vs WriteMail.ai
  2. 2
    AI Perfect Assistant Free plan AndroidextensioniOSWebWin $16.99/mo7.8
    AI Email Assistant for Thunderbird vs AI Perfect Assistant
  3. 3
    GPT for Gmail Free plan AndroidextensioniOSWeb $9/mo7.8
    AI Email Assistant for Thunderbird vs GPT for Gmail
  4. 4
    WPS AI Email Writer Free plan AndroidiOSLinuxMacWeb Free7.7
    AI Email Assistant for Thunderbird vs WPS AI Email Writer
  5. 5
    Xemail AndroidiOSWeb $5.83/mo7.4
    AI Email Assistant for Thunderbird vs Xemail
  6. 6
    DraftKind Android 7.1
    AI Email Assistant for Thunderbird vs DraftKind
  7. 7
    Professionally AI Email Writer Free trial extensioniOSMacWebWin $5.40/mo7.0
    AI Email Assistant for Thunderbird vs Professionally AI Email Writer
  8. 8
    Jetwriter AI Free plan extensionWeb $14/mo6.4
    AI Email Assistant for Thunderbird vs Jetwriter AI
  9. 9
    Kerna Free plan MacWebWin €12/mo6.4
    AI Email Assistant for Thunderbird vs Kerna
  10. 10
    Lavender Free plan extensionWeb $27/mo6.4
    AI Email Assistant for Thunderbird vs Lavender
  11. 11
    Ellie Free plan extensionWebWin $19/mo6.3
    AI Email Assistant for Thunderbird vs Ellie
  12. 12
    Flailo Free plan apiWeb $29/mo6.3
    AI Email Assistant for Thunderbird vs Flailo
  13. 13
    ForthWrite Free plan apiextensionMacWebWin $24/mo6.3
    AI Email Assistant for Thunderbird vs ForthWrite
  14. 14
    MailMaestro Free plan extensionWeb $12/mo6.3
    AI Email Assistant for Thunderbird vs MailMaestro
  15. 15
    MailSome Free plan extensionWeb €8.25/mo6.3
    AI Email Assistant for Thunderbird vs MailSome
  16. 16
    Mailyr Free plan extension $4.90/mo6.3
    AI Email Assistant for Thunderbird vs Mailyr
  17. 17
    Workforce AI Email Drafter Free plan Web $99/mo6.3
    AI Email Assistant for Thunderbird vs Workforce AI Email Drafter
  18. 19
    Composer AI Free plan extensionWeb Free6.2
    AI Email Assistant for Thunderbird vs Composer AI
  19. 20
    Maillifier Free plan self-hostedWeb Free6.2
    AI Email Assistant for Thunderbird vs Maillifier
  20. 21
    OpenReply Free plan extension Free6.2
    AI Email Assistant for Thunderbird vs OpenReply

AI Email Assistant for Thunderbird alternatives compared

#AppScoreFree planFromRuns on
1WriteMail.ai7.9Free plan$5/moAndroid, Browser, iOS, Mac, Web, Windows
2AI Perfect Assistant7.8Free plan$16.99/moAndroid, Browser, iOS, Web, Windows
3GPT for Gmail7.8Free plan$9/moAndroid, Browser, iOS, Web
4WPS AI Email Writer7.7Free planFreeAndroid, iOS, Linux, Mac, Web, Windows
5Xemail7.4No$5.83/moAndroid, iOS, Web
6DraftKind7.1No—Android
7Professionally AI Email Writer7.0No$5.40/moBrowser, iOS, Mac, Web, Windows
8Jetwriter AI6.4Free plan$14/moBrowser, Web
9Kerna6.4Free plan€12/moMac, Web, Windows
10Lavender6.4Free plan$27/moBrowser, Web
11Ellie6.3Free plan$19/moBrowser, Web, Windows
12Flailo6.3Free plan$29/moAPI, Web
13ForthWrite6.3Free plan$24/moAPI, Browser, Mac, Web, Windows
14MailMaestro6.3Free plan$12/moBrowser, Web
15MailSome6.3Free plan€8.25/moBrowser, Web
16Mailyr6.3Free plan$4.90/moBrowser
17Workforce AI Email Drafter6.3Free plan$99/moWeb
19Composer AI6.2Free planFreeBrowser, Web
20Maillifier6.2Free planFreeself-hosted, Web
21OpenReply6.2Free planFreeBrowser
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Questions about AI Email Assistant for Thunderbird alternatives

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

WriteMail.ai, number 1 in AI email writing tools with a score of 7.9 out of 10. The others here: AI Perfect Assistant, GPT for Gmail, WPS AI Email Writer and 16 more.

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

WriteMail.ai is the best-ranked alternative with a free plan. 17 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation.