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Proteus Design Suite vs SimulIDE: catalog facts
Proteus Design Suite	SimulIDE
Paid Commercial software sold by Labcenter Electronics.	Free Free and open source under the AGPLv3 licence.
Windows	Linux
Simulates microcontroller firmware together with the circuit Schematic capture and PCB layout in one suite	Simulates PIC, AVR and Arduino microcontrollers alongside analog and digital parts Built-in code editor and debugger with breakpoints
Commercial licence required Pricing is not listed on the homepage	Aimed at learning and hobby work rather than professional circuit design Debugging is described as basic
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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