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Purr Data vs plugdata: catalog facts
Purr Data	plugdata
Free Free and open source; the package metadata identifies GPL-3.0-or-later and BSD-3-Clause…	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Windows, macOS, Linux, iOS
Builds programs through visual data-flow diagrams Supports real-time sound, video and graphics	Runs standalone or as a VST3, AU, CLAP or LV2 plugin Bundles ELSE, Cyclone and Gem libraries
Requires learning Pure Data's visual patching approach	Visual patching has a learning curve for newcomers to Pure Data Some Pure Data externals may need checking for compatibility
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later and BSD-3-Clause	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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