Free LTspice AlternativesCircuit Simulators & Electronic Design Automation Tools like LTspice

The best free alternative to LTspice is KiCad, 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, Pspice, Circuit JS and Ngspice.

filter to find the best alternatives

LTspice alternatives are mainly Circuit Simulators, but if you're looking for Electronic Design Automation Tools or Circuit Designers you can filter on that. Other popular filters include Linux, Android, iPad, Free, iPad + Circuit Simulation, Open Source and iPhone. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to LTspice.
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Alternatives list

  1. KiCad icon

    KiCad

     122 likes

    KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras. And features an integrated environment between schematic capture, bill of...

    59 KiCad alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • PortableApps.com
    • Docker
    PcbNew - Editor
     
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    1
    Comments about KiCad as an Alternative to LTspice
    Guest
    Positive
    0

    Kicad is primarily for PCB layout. And it is great for that.

    KiCad icon
    KiCad icon
    • KiCad is Free and Open SourceLTspice is Free and Proprietary
    • KiCad is LightweightLTspice is not according to our users
  2. QUCS icon

    QUCS

     38 likes

    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.

    36 QUCS alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    QUCS screenshot 1
     
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    1
    Comments about QUCS as an Alternative to LTspice
    Guest
    Positive
    3

    it is much easier to operate compared to Lt Spice

    Review by a new / low-activity user.
    QUCS icon
    QUCS icon
    • QUCS is Free and Open SourceLTspice is Free and Proprietary
  4. Pspice icon

    Pspice

     5 likes

    Software for Simulating Voltage and Currents of a text file net-list of a electronics components such as Resistors, Capacitors, inductors, transisters, Diodes, Voltage and Current Sources, etc.

    32 Pspice alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application types

    Platforms

    • Windows
    Pspice screenshot 1
     
  5. Circuit JS icon

    Circuit JS

     63 likes

    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.

    47 Circuit JS alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Circuit JS screenshot 1
     
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    5
    Comments about Circuit JS as an Alternative to LTspice
    Top Positive Comment
    guoiewbvc923
    0

    The best free tool to simulate circuits in the browser. There are almost no other tools to do simulations in a browser and it even allows to save and load circuits as files.

    Top Negative Comment
    Guest
    1

    It isn't a SPICE software!

    Review by a new / low-activity user.
    Guest
    Negative
    1

    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).

    Review by a new / low-activity user.
    3 of 5 comments
    Circuit JS icon
    Circuit JS icon
    • Circuit JS is Free and Open SourceLTspice is Free and Proprietary
  6. Ngspice icon

    Ngspice

     8 likes

    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.

    38 Ngspice alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    ngspice on KDE (Linux) with gschem in background
     
  7. Qucs-S icon

    Qucs-S

     3 likes

    Qucs-S is a spin-off of the Qucs cross-platform circuit simulator. "S" letter indicates SPICE. The purpose of the Qucs-S subproject is to use free SPICE circuit simulation kernels with the Qucs GUI.

    31 Qucs-S alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    • Flathub
    • Flatpak
    Qucs-S screenshot 1
     
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    2
    Comments about Qucs-S as an Alternative to LTspice
    Guest
    Positive
    0

    Has a nice graphical interface and can integrate a simulation application like ngspice

    Review by a new / low-activity user.
    Guest
    Positive
    0

    Harmonic Balance simulation and Xyce!

    Review by a new / low-activity user.
    Qucs-S icon
    Qucs-S icon
    • Qucs-S is Free and Open SourceLTspice is Free and Proprietary
  9. VoltSim icon

    VoltSim

     2 likes

    VoltSim is an interactive realtime circuit simulator. It has digital and analog components and even Integrated Circuits. It is the perfect companion to students, hobbyists, and engineers.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Android
    • Android Tablet
    VoltSim screenshot 1
     
  10. MacSpice icon

    MacSpice

     1 like

    Simulates and analyses electronic circuits that can range in complexity from a single resistor to an integrated circuit comprising tens-of-thousands of devices.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Mac
    MacSpice screenshot 1
     
  11. OpenModelica icon

    OpenModelica

     18 likes

    OpenModelica – A Free Modelica Environment! OpenModelica is an open-source Modelica-based modeling and simulation environment intended for industrial and academic usage. Its long-term development is supported by a non-profit organization – the Open Source Modelica Consortium (OS.

    48 OpenModelica alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    OpenModelica screenshot 1
     
  12. Ktechlab icon

    Ktechlab

     28 likes

    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.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Linux
    Ktechlab screenshot 1
     
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    1
    Comments about Ktechlab as an Alternative to LTspice
    Guest
    Positive
    0

    good documentation written in simple terms and easy to use

    Review by a new / low-activity user.
    Ktechlab icon
    Ktechlab icon
    • Ktechlab is Free and Open SourceLTspice is Free and Proprietary
    • Ktechlab is Privacy focused and LightweightLTspice is not according to our users
  13. Everycircuit icon

    Everycircuit

     12 likes

    Design and simulate electronic circuits! All joking aside, this time you will understand how electronic circuits work. "I stumbled upon some serious gold" - GeekBeat.tv "A fully realized circuit simulator" - EDA360 Insider Build any circuit, tap play button, a.

    12 Everycircuit alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Android
    • iPhone
    • Windows Phone
    • Kindle Fire
    Everycircuit screenshot 1
     
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    1
    Comments about Everycircuit as an Alternative to LTspice
    Andreas
    Positive
    0

    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.

    Everycircuit icon
    Everycircuit icon
    • Everycircuit is Freemium and ProprietaryLTspice is Free and Proprietary
  14. Coulomb icon

    Coulomb

     2 likes

    Coulomb is a simple and elegant circuit simulator written using Java, Gtk4 and libadwaita.

    Cost / License

    Application type

    Platforms

    • Linux
    • Flathub
    • Flatpak
    Coulomb screenshot 1
     
12 of 20 LTspice alternatives