AI Email Assistant for Thunderbird
AI Email Assistant for Thunderbird is a free, open-source extension that adds AI actions to Thunderbird’s compose window.
What AI Email Assistant for Thunderbird is
AI Email Assistant for Thunderbird is a free, open-source extension that adds AI actions to Thunderbird’s compose window. It can rewrite selected text, draft an email from a description, suggest three subject lines, and translate messages into Polish, English, German, French, Spanish, Ukrainian, and Russian. Supported providers include Google Gemini, Groq, OpenAI, Anthropic Claude, xAI Grok, OpenRouter, and Ollama. Ollama runs locally and is described as 100% free, while other providers may charge and require your own API key. Generated text can be refined with a comment, and actions are available from the right-click menu or Ctrl+Shift+Space. The extension stores the last 50 operations locally and allows unlimited custom writing styles. The maker says there is no telemetry, analytics, or tracking; email goes only to the provider you select. API keys stay local and can optionally use AES-256-GCM encryption, while history is never synced externally. The MIT-licensed project is free for personal and commercial use. Installation uses a downloadable .xpi file and Thunderbird’s Add-ons and Themes menu.
Good
- Free MIT-licensed extension
- Supports seven translation languages
- Works with multiple AI providers
- Optional local Ollama processing
- No telemetry, analytics, or tracking
Watch out
- Requires your own API key
- Provider usage may cost extra
- Thunderbird extension only
- Keeps only the last 50 operations
Who it suits
It suits Thunderbird users wanting configurable AI writing and translation, especially those preferring local processing or open-source software.
Verdict
This extension adds practical drafting, rewriting, subject suggestions, and translation directly to Thunderbird. Its local storage and Ollama option appeal to privacy-focused users, but setup depends on provider keys and usage costs.
Plans and prices
From AI Email Assistant for Thunderbird's own pricing page, checked 5 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| AI Email Assistant for Thunderbird | Free | Bring your own API key; AI provider usage may cost extra |
The facts
Each one read from AI Email Assistant for Thunderbird's own pages, with the date it was checked.
What it does
- AI integrations
- Supported providers are Google Gemini, Groq, OpenAI, Anthropic Claude, xAI Grok, OpenRouter, and Ollama.checked 5 Oct 2026
- History and styles
- The extension stores the last 50 operations locally and allows users to add unlimited custom writing styles.checked 5 Oct 2026
- Installation
- The maker provides a downloadable .xpi file and installation instructions for Thunderbird's Add-ons and Themes menu.checked 5 Oct 2026
- Key storage
- API keys are stored locally and can optionally be encrypted with AES-256-GCM; history is stored locally and never synced to external servers.checked 5 Oct 2026
- License
- The project uses the MIT License and is free for personal and commercial use.checked 5 Oct 2026
- Local option
- Ollama runs locally and is described as 100% free, for complete privacy.checked 5 Oct 2026
- Privacy
- The maker says there is no telemetry, analytics, or tracking, and emails are sent only to the AI provider the user chooses.checked 5 Oct 2026
- Purpose
- A free, open-source Thunderbird extension that adds AI to the email compose window.checked 5 Oct 2026
- Refinement and access
- Users can refine generated text with a comment and access AI actions through the right-click menu or Ctrl+Shift+Space.checked 5 Oct 2026
- Support and contributions
- The maker invites bug reports through GitHub Issues and feature ideas through Discussions, and welcomes pull requests.checked 5 Oct 2026
- Translation
- It translates emails into Polish, English, German, French, Spanish, Ukrainian, and Russian.checked 5 Oct 2026
- Writing tools
- It can rewrite selected text, draft a complete email from a description, and suggest three subject lines.checked 5 Oct 2026
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