Simantic

Embedded engineers need to test firmware against real microcontroller behavior, such as reset timing, I2C communication, and signal rise times, but doing this typically requires physical hardware boards. This makes it hard to test every commit in CI/CD, run tests from arbitrary environments like a terminal, or let automated tools and AI agents validate code they write. Without a way to simulate hardware behavior reliably, teams are constrained to testing on physical devices, limiting automation and scale of testing.

Simantic provides virtual microcontrollers that run real firmware in simulation, accessible via an HTTP API with TypeScript and Python clients, with a CLI and MCP integration coming soon. This lets developers test firmware in CI/CD pipelines, from a terminal, or through AI agents, without needing physical hardware. The company validates its simulation engine against real silicon as a reference standard, aiming for reproducible tests with clear evidence of what works and where the simulation's boundaries are. The product, called Cloud Sim, is positioned as infrastructure to run, inspect, and test embedded systems from a single MCU up to connected devices.