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Coulomb vs LTspice: catalog facts
Coulomb	LTspice
Free Free and open source under the GPL-3.0 licence.	Free Free to download from Analog Devices.
Linux	Windows
Plots voltage and current of components over time Clean GTK4 and libadwaita interface	SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results
Simpler than SPICE-based tools Small project with a single main developer	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: GPL-3.0-or-later	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.