Email services checked for AI writing assistants and other generative AI features.
Paid email service whose maker says it hasn't integrated AI into the inbox
No generative AI features found. Checked 26 Oct 2026 (Fastmail blog (MCP server post) + help article)
Alternative to Gmail
German email, calendar and office suite with no AI features listed on its product page
No generative AI features found. Checked 26 Oct 2026 (mailbox.org product page (feature pages))
Alternative to Gmail
Encrypted email with an optional AI writing assistant (Proton Scribe) that you can switch off
AI optional or can be switched off. Checked 26 Oct 2026
Encrypted email service whose maker says it won't add cloud-based AI to its email client
No generative AI features found. Checked 26 Oct 2026 (vendor statement, Jul 2023)
Alternative to Gmail
No tools match these filters. Suggest one.
Counts come from the listings on this page, last verified 26 Oct 2026.