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Opera vs Slimjet: catalog facts
Opera	Slimjet
Free Free to download and use. The software is closed source.	Free Free to download and use. The software is closed source.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux
Ad blocking, a no-account proxy VPN, workspaces and sidebar messengers all ship in the browser itself rather than…	Ad blocking works without extensions, and the extra download, form-fill and video tools are part of the browser…
It is closed source and owned by a Chinese consortium, and the built-in VPN is a browser proxy…	It is closed source and maintained by a very small team, so security updates depend on how quickly…
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
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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