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JACK Audio Connection Kit vs Loopback: catalog facts
JACK Audio Connection Kit	Loopback
Free Free and open source. Hosting, hardware and any external services are separate.	Paid Requires a paid license or subscription. Trial availability and licensing depend on the…
Linux, macOS, Windows	macOS
Routes audio between compatible applications Supports low-latency production workflows	Provides a visual audio-routing interface Routes sources into virtual devices for other apps
Requires compatible applications and careful device configuration.	Requires a paid license and macOS audio permissions.
Downloadable app	Downloadable app
Open 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.