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Shortwave vs Canary Mail: catalog facts
Shortwave	Canary Mail
Freemium Free to start with no credit card required, with paid options for more features.	Paid Paid subscription, with a free trial or limited free tier.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS
AI filters written in plain English Drafts replies that match your writing style	Built-in encryption support alongside AI-assisted email triage Available across Windows, Mac, iOS, and Android
Built for Gmail accounts Relies on a hosted AI service that processes your mail	Full feature set requires a paid subscription AI features depend on cloud processing rather than being fully local
Downloadable app, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.