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Purr Data vs Pure Data: catalog facts
Purr Data	Pure Data
Free Free and open source; the package metadata identifies GPL-3.0-or-later and BSD-3-Clause…	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Builds programs through visual data-flow diagrams Supports real-time sound, video and graphics	Visual patching with no text code needed Real-time audio processing for performance and installations
Requires learning Pure Data's visual patching approach	Patching has a steep learning curve The official site uses a bot-protection challenge that some browser plugins break
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later and BSD-3-Clause	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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