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Coulomb vs SimulIDE: catalog facts
Coulomb	SimulIDE
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the AGPLv3 licence.
Linux	Linux
Plots voltage and current of components over time Clean GTK4 and libadwaita interface	Simulates PIC, AVR and Arduino microcontrollers alongside analog and digital parts Built-in code editor and debugger with breakpoints
Simpler than SPICE-based tools Small project with a single main developer	Aimed at learning and hobby work rather than professional circuit design Debugging is described as basic
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: AGPL-3.0
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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