Compare software

Sizzy vs Polypane: catalog facts
Sizzy	Polypane
Paid A paid subscription is required after the trial.	Paid A paid subscription is required after the trial.
Windows, macOS, Linux	Windows, macOS, Linux, Browser extension
Project workspaces keep devices, URLs and sessions together Isolated sessions per project avoid cookie collisions between clients	Accessibility simulation and checks built into the browser itself Synchronised panes with live CSS editing across all of them
Paid subscription Chromium rendering only	Paid subscription with no free tier beyond a trial Chromium rendering only
Downloadable app	Downloadable app, Browser extension
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.