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Proteus Design Suite vs LTspice: catalog facts
Proteus Design Suite	LTspice
Paid Commercial software sold by Labcenter Electronics.	Free Free to download from Analog Devices.
Windows	Windows
Simulates microcontroller firmware together with the circuit Schematic capture and PCB layout in one suite	SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results
Commercial licence required Pricing is not listed on the homepage	Simulation only, with no PCB layout Details could not be confirmed from the official page at research time
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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