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Peninsula vs Seam: catalog facts
Peninsula	Seam
Free Free and open source under the GPL-3.0.	Paid One-time purchase of $19.90.
macOS	macOS
Cmd-Tab replacement for window switching Notification counts shown at the notch	Features can be enabled one at a time Local voice transcription and translation
Requires Accessibility permission and manual trust of the app Small one-person project with occasional updates	macOS only Paid app with no free tier mentioned
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account 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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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