Proteus is a classic in education and embedded prototyping because it simulates microcontroller firmware against a virtual circuit. ProtoFlow targets a different bottleneck, drafting the schematic itself with AI, then carries it through SPICE checks, layout and manufacturing files, with a clean KiCad export if you want one.
By Rishik Boddeti · Last reviewed
Founder of ProtoFlow, ECE at UT Austin
Quick answer
Proteus (by Labcenter) is best known for combining schematic capture and PCB layout with microcontroller simulation, you can run Arduino or other MCU firmware against simulated hardware. ProtoFlow does not simulate firmware; it is a free desktop PCB design app that uses AI to draft the schematic from plain English, imports real parts, runs standard SPICE (ngspice) analysis on the circuit, lays out the board, and exports Gerbers or a KiCad project. If your priority is fast AI-assisted circuit and board design rather than co-simulation, ProtoFlow is the better starting point; if firmware-on-hardware simulation is the point, Proteus is purpose-built for it.
Each row links to the vendor page it came from and shows the date we last read that page. Vendors change pricing often, so check the link before you buy.
| Product | Price or limit | Source | Checked |
|---|---|---|---|
| Labcenter Proteus | Paid perpetual licences, sold by package and module; education pricing available | labcenter.com |
| Criteria | ProtoFlow EDA | Proteus |
|---|---|---|
| Core strength | AI schematic drafting from plain English through layout and manufacturing files, free. | Schematic + layout + microcontroller co-simulation. |
| Simulation | Standard SPICE (ngspice): operating point, transient, AC, DC sweep; no firmware/MCU co-simulation. | Interactive MCU/firmware and SPICE simulation (VSM). |
| Cost | Free plan includes the full editor and AI. | Paid, licensed by module. |
| Real-part import | Unified LCSC / DigiKey / Mouser import. | Library-based; less focused on live distributor import. |
| Best fit | Fast AI-assisted circuit creation, SPICE checks and layout in one tool. | Embedded teaching and firmware-on-hardware simulation. |
Reviewed on: 2026-06-06
No. Proteus is built for microcontroller/firmware co-simulation. ProtoFlow runs standard SPICE (ngspice) analysis on the circuit, operating point, transient, AC and DC sweep, but it does not run firmware or simulate a microcontroller executing code.
To speed up the schematic-drafting stage. Generate and validate the circuit in ProtoFlow, then use Proteus where its firmware co-simulation is the real value.
ProtoFlow's free plan includes the full editor and AI. Proteus is a commercial product licensed by module.
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