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LTspice vs CircuitSim: catalog facts
LTspice	CircuitSim
Best for: Electronics engineers, students and hobbyists simulating analog circuits	Best for: Students and hobbyists experimenting with simple circuits
Free Free to download from Analog Devices.	Free Free and open source under the Apache 2.0 licence.
Windows	Linux
SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results All 3 strengths for LTspice SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results Free of charge	Simulation updates live while you edit the circuit Covers both analog values and basic logic gates All 3 strengths for CircuitSim Simulation updates live while you edit the circuit Covers both analog values and basic logic gates Simple place-and-wire sandbox editor
Simulation only, with no PCB layout Details could not be confirmed from the official page at research time	Small project with few contributors Only basic digital logic support All 3 limitations for CircuitSim Small project with few contributors Only basic digital logic support Not a replacement for professional SPICE tools
Downloadable app	Downloadable app
Not open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for LTspice analog.com/en/resources/design-tools-and-calculators/ltspic… Catalog checked September 24, 2026	Official website Full listing and sources Sources for CircuitSim github.com/BlazingHotCode/CircuitSim Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.