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Opera Neon vs Dia: catalog facts
Opera Neon	Dia
Paid Offered as a paid subscription.	Freemium A free tier is available. Heavier use requires a paid plan.
Windows, macOS	macOS
Several agents for different kinds of tasks Can read and act on the pages you have open	Assistant reads your open tabs, so questions do not need copy and paste
Closed source Agent features depend on online AI services	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 September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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