Best AI Email Writing Tools in 2026
Updated
28ranked
2free plans on this page
10 Oct 2026last checked
Input list AI Email Writing Tools 3 channels on this page · 10 of 24 spec lines stated by the makers
Ch Tool Free planPaid fromTone controlsCustom instructionsEmail context inputBrowser extensionMail client supportSupported languages Spec sheet Score
26 thread. Free planYesPaid fromTone controlsYesCustom instructionsYesEmail context inputthreadBrowser extensionYesMail client supportbothSupported languages 6/8spec lines stated 6.5
27 AI Email Assistant for Thunderbird Free planYesPaid fromTone controlsCustom instructionsEmail context inputBrowser extensionNoMail client supportSupported languages 2/8spec lines stated 6.4
28 SalesPort AI Email Writer Free planPaid fromTone controlsYesCustom instructionsEmail context inputBrowser extensionYesMail client supportSupported languages 2/8spec lines stated 6.3
Compare all 3 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Tone controls | Custom instructions |
|---|---|---|---|---|---|---|---|---|
| 26 | thread. | 6.5 | Free plan | Free | Yes | Yes | Yes | |
| 27 | AI Email Assistant for Thunderbird | 6.4 | Free plan | Free | Yes | |||
| 28 | SalesPort AI Email Writer | 6.3 | Yes |