Compare software

CircuitSim vs LTspice: catalog facts
CircuitSim	LTspice
Free Free and open source under the Apache 2.0 licence.	Free Free to download from Analog Devices.
Linux	Windows
Simulation updates live while you edit the circuit Covers both analog values and basic logic gates	SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results
Small project with few contributors Only basic digital logic support	Simulation only, with no PCB layout Details could not be confirmed from the official page at research time
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.