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Qucs-S vs Xschem: catalog facts
Qucs-S	Xschem
Free Free and open source, supported by donations.	Free Free and open source.
Windows, macOS, Linux	Windows, Linux
Graphical schematic entry for SPICE simulation Windows installer bundles Ngspice	Netlist output for Spice, Verilog and VHDL Hierarchical and parametric schematics for reuse
Simulation only; no PCB layout macOS install goes through Homebrew	Aimed at IC and circuit designers, with a learning curve Schematic capture only; simulation needs separate tools
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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