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LTspice vs Proteus Design Suite: catalog facts
LTspice	Proteus Design Suite
Best for: Electronics engineers, students and hobbyists simulating analog circuits	Best for: Embedded engineers and students who want to simulate firmware and circuits before building a board
Free Free to download from Analog Devices.	Paid Commercial software sold by Labcenter Electronics.
Windows	Windows
SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results All 3 strengths for LTspice SPICE simulation with schematic capture in one program Built-in waveform viewer for inspecting results Free of charge	Simulates microcontroller firmware together with the circuit Schematic capture and PCB layout in one suite All 4 strengths for Proteus Design Suite Simulates microcontroller firmware together with the circuit Schematic capture and PCB layout in one suite IoT Builder for Arduino and Raspberry Pi projects Actively developed, with version 9.2 recently released
Simulation only, with no PCB layout Details could not be confirmed from the official page at research time	Commercial licence required Pricing is not listed on the homepage
Downloadable app	Downloadable app
Not open source	Not open 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 Sources for LTspice analog.com/en/resources/design-tools-and-calculators/ltspic… Catalog checked September 24, 2026	Official website Full listing and sources Sources for Proteus Design Suite labcenter.com Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.