Qucs/qucs

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1312 stars · 225 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Qucs (Quite Universal Circuit Simulator) is a GPL-licensed graphical circuit simulator with a Qt-based schematic capture GUI for simulating analog, RF, and digital circuits. This is the community-maintained mirror of the official project, now working toward interoperability with other simulators like Gnucap and NGSPICE.

Use cases

• simulate analog circuits before building them
• design and verify RF and microwave circuits
• draw schematics and run AC/DC/S-parameter simulations
• teach electronics with a free circuit simulator
• simulate VHDL or Verilog digital designs alongside analog circuits
• synthesize filters and matching networks
• export netlists to SPICE simulators like NGSPICE

When to choose

• you need a free, open-source alternative to commercial SPICE tools with a GUI
• you work with RF/microwave circuits needing S-parameter analysis
• you want schematic capture and simulation in one cross-platform tool
• you're teaching or learning circuit design on Linux, Windows, or macOS

When to avoid

• you need industrial-grade, vendor-supported EDA with guaranteed model accuracy
• you only want a scriptable command-line simulator without a GUI
• you need PCB layout capabilities - Qucs is simulation only
• you require cutting-edge device models with commercial support contracts

Facets

application · maturity active

simulation gui graphics simulation hardware education cross-platform windows cpp cross-platform circuit-simulator electronics eda spice qt schematic-capture rf-design linux macos desktop

Member repositories

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markdown · JSON · MCP: product_card(name="Qucs/qucs")