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HammerAI vs Chai: catalog facts
HammerAI	Chai
Freemium Chat is free with local and cloud models; paid plans are listed on the pricing page.	Freemium Free to download, with revenue from paid use inside the app.
iOS, Web	Android, iOS
Local models through Ollama in the desktop app Messages stored only on your computer by default	Large catalog of community-made characters Users can create their own characters and stories
Focused on roleplay rather than general productivity Desktop platforms supported are not stated on the homepage	Mobile only Aimed at entertainment and companionship, not productivity
Downloadable app, Web application	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
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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