PSpice and LTspice are native to Windows. If you are on Linux or macOS, or if you prefer open-source software, Ngspice is the engine of choice.
If you specifically need to run legacy files (.cir, .dat), try these:
You do not need to spend $5,000 to simulate circuits professionally. gives you the official Cadence interface at zero cost, while LTspice gives you unlimited freedom.
Free Pspice Simulator [2021] Jun 2026
PSpice and LTspice are native to Windows. If you are on Linux or macOS, or if you prefer open-source software, Ngspice is the engine of choice.
If you specifically need to run legacy files (.cir, .dat), try these: free pspice simulator
You do not need to spend $5,000 to simulate circuits professionally. gives you the official Cadence interface at zero cost, while LTspice gives you unlimited freedom. PSpice and LTspice are native to Windows