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Shortwave vs Mimestream: catalog facts
Shortwave	Mimestream
Freemium Free to start with no credit card required, with paid options for more features.	Paid Paid app with a free trial available to download.
Windows, macOS, Android, iOS	macOS
AI filters written in plain English Drafts replies that match your writing style	Native Mac interface Full support for Gmail labels, categories and filters
Built for Gmail accounts Relies on a hosted AI service that processes your mail	Works only with Gmail accounts Mac only, requires macOS 12 or newer
Downloadable app, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Account 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.