Compare software

Shortwave vs Microsoft Outlook: catalog facts
Shortwave	Microsoft Outlook
Freemium Free to start with no credit card required, with paid options for more features.	Freemium Free app and account available; Microsoft 365 plans add paid features and Office apps.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS, Web
AI filters written in plain English Drafts replies that match your writing style	Email, calendar and contacts for multiple accounts in one app Available on desktop, mobile and web
Built for Gmail accounts Relies on a hosted AI service that processes your mail	Closed source and tied to Microsoft services Some features, including Copilot, require a paid plan
Downloadable app, Hosted service	Downloadable app, Web application
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 23, 2026

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