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Free LTspice Alternatives

The best free alternative to LTspice is Circuit JS, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to LTspice and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to LTspice are QUCS, OpenModelica, Xcos and Everycircuit.

LTspice alternatives are mainly Circuit Simulators but may also be Electronic Design Automation Tools or CAD Software. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of LTspice.
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LTspice iconLTspice
  19
  • FreeProprietary
  • Mac
  • Windows

LTspice IV is a high performance Spice III simulator, schematic capture and waveform viewer with enhancements and models...

Learn more about LTspice

  1. Circuit JS icon

    Circuit JS

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online

    This is a javascript electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage.

    ⚫︎ PortableCircuit JS can be used from a USB stick or similar with no prior installation.
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    Circuit JS vs LTspice opinions
    Some users think Circuit JS is a great alternative to LTspice, some don't.

    CircuitJS does not run Spice (the core circuit simulator used by LTSpice, PSpice, and others). CircuitJS does not have built-in models for manufactured components nor does it allow you to define your own subcircuits. It was never built for commercial circuit design (while LTSpice was).

    Negative comment ago
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    Browser version is not the same as running locally

    Negative comment ago
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    1

    Too simplistic compared to LTspice

    Negative comment ago
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    2
  2. QUCS icon

    QUCS

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    The Quite Universal Circuit Simulator (QUCS) is an integrated circuit simulator allowing the simulation and graphical presentation of results of large-signal, small-signal and noise behavior in circuits.

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    QUCS vs LTspice opinions
    Most users think QUCS is a great alternative to LTspice.

    it is much easier to operate compared to Lt Spice

    Positive comment ago
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  3. OpenModelica icon

    OpenModelica

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    OpenModelica – A Free Modelica Environment!.

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  4. Xcos icon

    Xcos

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Xcos is a graphical editor to design hybrid dynamical systems models. Models can be designed, loaded, saved, compiled and simulated.

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  5. Everycircuit icon

    Everycircuit

    • FreemiumProprietary
    • Android
    • iPhone
    • Windows Phone
    • Kindle Fire

    Design and simulate electronic circuits!.

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    Everycircuit vs LTspice opinions
    pros, cons and recent comments
    Dromantor

    Simplistic circuit simulator for the phone (and the browser, but when on desktop why not use a proper simulator ...). Has all your basic building blocks for simple electronic circuits.

    Positive comment ago
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  6. Ktechlab icon

    Ktechlab

    • FreeOpen Source
    • Linux

    KTechLab is an IDE for microcontrollers and electronics. It supports circuit simulation, program development for microcontrollers and simulating the programmed microcontroller together with its application circuit.

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  7. Schematics icon

    Schematics

    • Free PersonalProprietary
    • Online

    Schematics.com empowers engineers to design, share, and collaborate on circuit design online.

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  8. Solve Elec icon

    Solve Elec

    • FreeProprietary
    • Mac
    • Windows

    Solve Elec is a free educational program to draw and analyze electrical circuits.

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  9. Oregano icon

    Oregano

    • FreeOpen Source
    • Linux

    oregano - An electrical engineering tool for GNOME.

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  10. Ngspice icon

    Ngspice

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is based on three open source software packages: Spice3f5, Cider1b1 and Xspice. Ngspice is part of gEDA project, a full GPL'd suite of Electronic Design Automation tools.

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    ngspice on KDE (Linux) with gschem in background
Showing 10 of 20 alternatives