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Helvum vs qpwgraph: catalog facts
Helvum	qpwgraph
Free Free and open source under the GPL 3.	Free Free and open source.
Linux	Linux
Visual graph of PipeWire nodes and links Connect streams by dragging	Visual routing of PipeWire audio and MIDI Drag-and-drop connections between ports
Only works with PipeWire Linux only	Linux with PipeWire only Assumes some familiarity with audio routing
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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