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Aside vs Dia: catalog facts
Aside	Dia
Free Free download; the homepage does not list paid plans.	Freemium A free tier is available. Heavier use requires a paid plan.
macOS	macOS
AI agent works across logged-in sites Background agent tabs and scheduled tasks	Assistant reads your open tabs, so questions do not need copy and paste
Only a macOS build is evident Giving an agent access to logged-in accounts carries risk	macOS only and requires an account The assistant sends page content to a remote service, which has privacy implications
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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