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Alter vs Fello AI: catalog facts
Alter	Fello AI
Freemium Download and start without a credit card; paid plan details are not given in the research.	Freemium Free to start, with paid access for more use.
macOS	macOS, iOS
Uses screen and app context for requests Voice commands and dictation that trigger actions	Many AI models from one subscription Floating chat bar that works over any Mac app
Mac only, macOS 14 or later Pricing is not clearly stated on the homepage	Apple platforms only Closed source and dependent on third-party model providers
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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