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SimulIDE vs CircuitSim: catalog facts
SimulIDE	CircuitSim
Free Free and open source under the AGPLv3 licence.	Free Free and open source under the Apache 2.0 licence.
Linux	Linux
Simulates PIC, AVR and Arduino microcontrollers alongside analog and digital parts Built-in code editor and debugger with breakpoints	Simulation updates live while you edit the circuit Covers both analog values and basic logic gates
Aimed at learning and hobby work rather than professional circuit design Debugging is described as basic	Small project with few contributors Only basic digital logic support
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: Apache-2.0
Not stated if an account is needed	No account 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.