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Best AI Email Assistant for Thunderbird Alternatives in 2026

Updated

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

  1. 1
    Ellie Free plan extensionWebWin $19/mo7.7
    AI Email Assistant for Thunderbird vs Ellie
  2. 2
    ForthWrite Free plan apiextensionMacWebWin $24/mo7.7
    AI Email Assistant for Thunderbird vs ForthWrite
  3. 3
    Lavender Free plan extensionWeb $27/mo7.7
    AI Email Assistant for Thunderbird vs Lavender
  4. 4
    Jetwriter AI Free plan extensionWeb $14/mo7.6
    AI Email Assistant for Thunderbird vs Jetwriter AI
  5. 5
    MailMaestro Free plan extensionWeb $12/mo7.6
    AI Email Assistant for Thunderbird vs MailMaestro
  6. 6
    Workforce AI Email Drafter Free plan Web $99/mo7.6
    AI Email Assistant for Thunderbird vs Workforce AI Email Drafter
  7. 7
    MailSome Free plan extensionWeb €8.25/mo7.5
    AI Email Assistant for Thunderbird vs MailSome
  8. 8
    WriteMail.ai Free plan AndroidextensioniOSMacWeb $5/mo7.5
    AI Email Assistant for Thunderbird vs WriteMail.ai
  9. 9
    Maillifier Free plan self-hostedWeb Free7.4
    AI Email Assistant for Thunderbird vs Maillifier
  10. 10
    Kerna Free plan MacWebWin €12/mo7.3
    AI Email Assistant for Thunderbird vs Kerna
  11. 11
    AI Perfect Assistant Free plan AndroidextensioniOSWebWin $16.99/mo7.2
    AI Email Assistant for Thunderbird vs AI Perfect Assistant
  12. 12
    WPS AI Email Writer Free plan AndroidiOSLinuxMacWeb Free7.1
    AI Email Assistant for Thunderbird vs WPS AI Email Writer
  13. 13
    Flailo Free plan apiWeb $29/mo7.0
    AI Email Assistant for Thunderbird vs Flailo
  14. 14
    Professionally AI Email Writer Free trial extensioniOSMacWebWin $5.40/mo7.0
    AI Email Assistant for Thunderbird vs Professionally AI Email Writer
  15. 15
    Composer AI Free plan extensionWeb Free6.9
    AI Email Assistant for Thunderbird vs Composer AI
  16. 16
    GPT for Gmail Free plan AndroidextensioniOSWeb $9/mo6.9
    AI Email Assistant for Thunderbird vs GPT for Gmail
  17. 17
    Mailyr Free plan extension $4.90/mo6.9
    AI Email Assistant for Thunderbird vs Mailyr
  18. 18
    ReplyCalm Free plan Web $9/mo6.9
    AI Email Assistant for Thunderbird vs ReplyCalm
  19. 19
    OpenReply Free plan extension Free6.8
    AI Email Assistant for Thunderbird vs OpenReply
  20. 20
    InReply Free trial Web £39/mo6.7
    AI Email Assistant for Thunderbird vs InReply

AI Email Assistant for Thunderbird alternatives compared

#PlatformScoreFree planFromRuns on
1Ellie7.7Free plan$19/moBrowser, Web, Windows
2ForthWrite7.7Free plan$24/moAPI, Browser, Mac, Web, Windows
3Lavender7.7Free plan$27/moBrowser, Web
4Jetwriter AI7.6Free plan$14/moBrowser, Web
5MailMaestro7.6Free plan$12/moBrowser, Web
6Workforce AI Email Drafter7.6Free plan$99/moWeb
7MailSome7.5Free plan€8.25/moBrowser, Web
8WriteMail.ai7.5Free plan$5/moAndroid, Browser, iOS, Mac, Web, Windows
9Maillifier7.4Free planFreeself-hosted, Web
10Kerna7.3Free plan€12/moMac, Web, Windows
11AI Perfect Assistant7.2Free plan$16.99/moAndroid, Browser, iOS, Web, Windows
12WPS AI Email Writer7.1Free planFreeAndroid, iOS, Linux, Mac, Web, Windows
13Flailo7.0Free plan$29/moAPI, Web
14Professionally AI Email Writer7.0No$5.40/moBrowser, iOS, Mac, Web, Windows
15Composer AI6.9Free planFreeBrowser, Web
16GPT for Gmail6.9Free plan$9/moAndroid, Browser, iOS, Web
17Mailyr6.9Free plan$4.90/moBrowser
18ReplyCalm6.9Free plan$9/moWeb
19OpenReply6.8Free planFreeBrowser
20InReply6.7No£39/moWeb
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Questions about AI Email Assistant for Thunderbird alternatives

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

Ellie, number 1 in AI email writing tools with a score of 7.7 out of 10. The others here: ForthWrite, Lavender, Jetwriter AI and 16 more.

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

Ellie is the best-ranked alternative with a free plan. 18 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.