Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.


  • schematic capture
  • analog and digital simulations
  • data visualization

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

User Reviews

  • Best open source EDA tool around with Both HB and S-parameter simulation on top of all the standard spice simulations.

  • Still too complicated too use or at least not intuitive GUI at all! Have been able to open examples - BUT still I can't simulate the circuit (without reading the help or documentations) :/ I like the project and effort though and that's why I'm giving high rating.

  • Just looking into the docs, the amount of work these guys are putting into this project is amazing

  • Have been compiling/packaging Qucs since version 0.0.10. Now running qucs-0.0.19-150523-git-0046130, with few problems on Puppy Linux. I can see version 0.0.19 is going in the right direction and can't wait for the released version of 0.0.19.

  • Great work!! Excellent software! The best free OS X electronic simulator. Please keep it updated! ;-)

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Additional Project Details


Romanian, French, Ukrainian, Polish, Czech, Italian, Hebrew, Catalan, Portuguese, Swedish, Turkish, German, Japanese, Spanish, Russian, Arabic, Hungarian

Intended Audience

Science/Research, Education, End Users/Desktop, Engineering

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