Source: https://seerepo.com/r/simstudioai/sim
Markdown source: https://seerepo.com/r/simstudioai/sim.md
Description: simstudioai/sim is a TypeScript repo with 4,073,540 lines written in 10,948 files. AI signed 5.3% of the 8,178 commits of sim.

# What's inside simstudioai/sim

simstudioai/sim is a TypeScript repo with 4,073,540 lines written in 10,948 files. sim is built with Next.js, React, and FastAPI and uses Postgres, Redis, MongoDB, and 7 more. AI signed 5.3% of the 8,178 commits of sim.

Its description on GitHub: “Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.”

TypeScript · Apache-2.0 · 29,966 stars · GitHub: https://github.com/simstudioai/sim

Read on November 2, 2026, at commit df7709b.

## Its folders

- [What is sim built with?](https://seerepo.com/r/simstudioai/sim/built): sim is built with Next.js, React, and FastAPI and uses Postgres, Redis, MongoDB, and 7 more.
- [How much of sim did AI write?](https://seerepo.com/r/simstudioai/sim/ai): AI signed 5.3% of the 8,178 commits of sim.

## In figures

- 4,073,540 lines written: The ones people and agents wrote: product, tests, schemas and tooling. Generated code doesn’t count.
- 10,948 files: The product’s, not counting tests.
- 3,682 test files: The files that test the code.
- 13 technologies: Each service with the file and line that prove it.

SeeRepo read the facts in its code and kept none of it. AI only helps sort its packages and folders by their names, and never sees its code.

## Frequently asked questions

### What is simstudioai/sim?

simstudioai/sim is a TypeScript repo with 4,073,540 lines written in 10,948 files. Its description on GitHub: “Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.”

The proof: [its page on GitHub](https://github.com/simstudioai/sim)

### What is sim built with?

sim is built with Next.js, React, and FastAPI and uses Postgres, Redis, MongoDB, and 7 more.

The proof: [each service with its file and line](https://seerepo.com/r/simstudioai/sim/built)

### How much of sim did AI write?

AI signed 5.3% of the 8,178 commits of sim.

The proof: [the commits each tool signed](https://seerepo.com/r/simstudioai/sim/ai)

### What license does sim have?

sim is released under the Apache-2.0 license.

The proof: [its page on GitHub](https://github.com/simstudioai/sim)

### How many stars does sim have on GitHub?

sim had 29,966 stars on GitHub on November 2, 2026.

The proof: [its page on GitHub](https://github.com/simstudioai/sim)

## Add this badge to your README

It links to this page and updates itself each time SeeRepo reads the repo.

```markdown
[![simstudioai/sim on SeeRepo](https://seerepo.com/badge/simstudioai/sim.svg)](https://seerepo.com/r/simstudioai/sim?de=insignia)
```

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.