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.
- 1AI Email Assistant for Thunderbird vs Flailo
- 2AI Email Assistant for Thunderbird vs ForthWrite
- 3AI Email Assistant for Thunderbird vs Lavender
- 4AI Email Assistant for Thunderbird vs WriteMail.ai
- 5AI Email Assistant for Thunderbird vs AI Perfect Assistant
- 6AI Email Assistant for Thunderbird vs Ellie
- 7AI Email Assistant for Thunderbird vs GPT for Gmail
- 8AI Email Assistant for Thunderbird vs Jetwriter AI
- 9AI Email Assistant for Thunderbird vs Kerna
- 10AI Email Assistant for Thunderbird vs MailMaestro
- 11AI Email Assistant for Thunderbird vs MailSome
- 12AI Email Assistant for Thunderbird vs Mailyr
- 13AI Email Assistant for Thunderbird vs ReplyCalm
- 14AI Email Assistant for Thunderbird vs thread.
- 15AI Email Assistant for Thunderbird vs Workforce AI Email Drafter
- 17AI Email Assistant for Thunderbird vs Composer AI
- 18AI Email Assistant for Thunderbird vs Maillifier
- 19AI Email Assistant for Thunderbird vs OpenReply
- 20AI Email Assistant for Thunderbird vs WPS AI Email Writer
- 21AI Email Assistant for Thunderbird vs Demi
AI Email Assistant for Thunderbird alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Flailo | 7.3 | Free plan | $29/mo | API, Web |
| 2 | ForthWrite | 7.3 | Free plan | $24/mo | API, Browser, Mac, Web, Windows |
| 3 | Lavender | 6.0 | Free plan | $27/mo | Browser, Web |
| 4 | WriteMail.ai | 6.0 | Free plan | $5/mo | Android, Browser, iOS, Mac, Web, Windows |
| 5 | AI Perfect Assistant | 5.9 | Free plan | $16.99/mo | Android, Browser, iOS, Web, Windows |
| 6 | Ellie | 5.9 | Free plan | $19/mo | Browser, Web, Windows |
| 7 | GPT for Gmail | 5.9 | Free plan | $9/mo | Android, Browser, iOS, Web |
| 8 | Jetwriter AI | 5.9 | Free plan | $14/mo | Browser, Web |
| 9 | Kerna | 5.9 | Free plan | €12/mo | Mac, Web, Windows |
| 10 | MailMaestro | 5.9 | Free plan | $12/mo | Browser, Web |
| 11 | MailSome | 5.9 | Free plan | €8.25/mo | Browser, Web |
| 12 | Mailyr | 5.9 | Free plan | $4.90/mo | Browser |
| 13 | ReplyCalm | 5.9 | Free plan | $9/mo | Web |
| 14 | thread. | 5.9 | Free plan | Free | Browser |
| 15 | Workforce AI Email Drafter | 5.9 | Free plan | $99/mo | Web |
| 17 | Composer AI | 5.8 | Free plan | Free | Browser, Web |
| 18 | Maillifier | 5.8 | Free plan | Free | self-hosted, Web |
| 19 | OpenReply | 5.8 | Free plan | Free | Browser |
| 20 | WPS AI Email Writer | 5.8 | Free plan | Free | Android, iOS, Linux, Mac, Web, Windows |
| 21 | Demi | 5.6 | Free plan | $25/mo | Mac |
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Questions about AI Email Assistant for Thunderbird alternatives
What is the best alternative to AI Email Assistant for Thunderbird?
Flailo, number 1 in AI email writing tools with a score of 7.3 out of 10. The others here: ForthWrite, Lavender, WriteMail.ai and 16 more.
What is the best free alternative to AI Email Assistant for Thunderbird?
Flailo 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 on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.