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Nanobrowser vs Opera Neon: catalog facts
Nanobrowser	Opera Neon
Free Free and open source; you pay your chosen LLM provider for API usage.	Paid Offered as a paid subscription.
Browser extension	Windows, macOS
Runs inside your own browser Bring your own LLM API key	Several agents for different kinds of tasks Can read and act on the pages you have open
Needs a paid API key from a model provider Chrome-focused	Closed source Agent features depend on online AI services
Browser extension	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 23, 2026

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