Simantic Launches on Hacker News With $600,000 Raised and No Prices for Its Firmware Simulator

Simantic, a Waterloo firmware-simulation startup in Y Combinator's Fall 2026 batch, launched on Hacker News with a pitch that AI agents can test microcontroller code without touching a board. The company has raised about $600,000 and lists no prices on its site.

The Launch HN post drew 77 points. It describes a cloud simulator that runs firmware through a single API call, an AI code reviewer that uses the simulator to verify its own suggestions, and a CI step that checks firmware against a simulated chip on every commit.

Who is behind it and what it has raised

The University of Waterloo reported on July 31 that Seungmin Hong, a 2026 engineering graduate, launched Simantic in September 2025 as a solo venture. Ahnaf Shahriar, a computer engineering student, joined as co-founder in early 2026.

The university's article puts funding at roughly $600,000 and names no investors. It also names no customers. Co-op terms at Tesla, Neuralink and other hardware companies gave the founders the idea, after they watched engineers wait weeks or months for physical hardware.

What the launch post claims, and what the site shows

The founders wrote in the Hacker News thread that they wrote the simulation engine from scratch in Rust after an MVP built on the open-source Renode emulator ran into limits on speed, language, bloat and timing accuracy. They list STM32F0, F4 and H7 parts, the ESP32-S3 and C3, and the RP2040, with more promised weekly.

The product site, simantic.com, names one chip: the STM32F072RB, in the example for its pull-request bot. It offers an HTTP API, a TypeScript package and an MCP interface, and marks Python and a command-line tool as coming soon.

Item	Launch post	simantic.com
Chips named	STM32F0, F4, H7; ESP32-S3, C3; RP2040	STM32F072RB only
Prices	None listed	None listed
Access	Cloud simulator, native binary on developer plan	HTTP API, TypeScript, MCP; Python and CLI "coming soon"

The site says Simantic is "working to make" its engine "the most rigorously tested simulation engine for firmware," with real silicon as the reference. That is an aim, not a result. The post promises a silicon-gap report and had not published it at the time of the thread.

The competition, by the founders' own account

The post names Renode and QEMU as the open-source emulators it moved away from, and Synopsys Virtualizer, which it prices at about $500,000 a seat. That figure is the founders' and is not independently confirmed. One customer, a space startup, is described as testing satellite firmware before the satellites exist, at "a hundredth of the cost and time." The customer is not named.

Replies in the thread pressed on two points. The first was analog and mixed-signal parts of a board, which the founders confirmed their simulator does not co-simulate yet. The second was that a model written from a datasheet can repeat the datasheet's mistakes, so the firmware and the simulator agree and both are wrong. Differential testing against logic-analyzer traces from real boards was the suggested check, and the founders have not published such a comparison.

A separate reply argued that Claude can write firmware and test it on a bench. The founders answered that hardware quirks and upkeep are hard to copy.

What a buyer would check

The $600,000 is pre-seed money by the standards of the rounds in our look at Atomic's Series A, where the next step up is a priced institutional round. The chip list matters too: boards like the ESP32 parts in the ESP32 Kubernetes project we covered are on it, but the simulator's fit to a given production board is unproven.

The number to watch is the correlation report. Until Simantic publishes simulator-against-silicon results for the parts it lists, its accuracy rests on the founders' description.