Source: https://seerepo.com/compare/hcengineering/platform/vs/simstudioai/sim
Markdown source: https://seerepo.com/compare/hcengineering/platform/vs/simstudioai/sim.md
Description: platform and sim share 6 technologies: MongoDB, Postgres, Redis, OpenAI, AWS S3, and Stripe. Both are written in TypeScript.

# platform vs sim

platform and sim share 6 technologies: MongoDB, Postgres, Redis, OpenAI, AWS S3, and Stripe. Both are written in TypeScript.

- [hcengineering/platform](https://seerepo.com/r/hcengineering/platform): Huly — All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion)
- [simstudioai/sim](https://seerepo.com/r/simstudioai/sim): Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.

## What they share and what sets them apart

- In common: MongoDB, Postgres, Redis, OpenAI, AWS S3, Stripe
- Only in platform: Express, Actix Web, Google, GitHub
- Only in sim: Next.js, React, FastAPI, PostHog, MCP, Anthropic, Resend

## Side by side

| | platform | sim |
|---|---|---|
| Size | 813,859 lines written, 4,872 code files | 4,073,540 lines written, 10,948 code files |
| Who writes it | 0.5% of its commits signed by AI. With GitHub Copilot, Claude Code, and Devin | 5.3% of its commits signed by AI. With Claude Code, Cursor, and Codex |
| Activity | Last push November 2, 2026, 8,655 commits, 28,041 stars | Last push November 2, 2026, 8,178 commits, 29,966 stars |
| Tests | 685 test files. 9.4% of its code files have a test that imports them | 3,682 test files. 38.4% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, platform or sim?

sim, with 4,073,540 lines written in 10,948 code files; platform has 813,859 in 4,872.

The proof: [simstudioai/sim's code at commit df7709b](https://github.com/simstudioai/sim/tree/df7709bf5be6a42d51c5289364b98d32c4d38240)

### Which has more GitHub stars, platform or sim?

sim, with 29,966 stars; platform has 28,041.

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

### Which has more tests, platform or sim?

sim, with 3,682 test files; platform has 685.

The proof: [simstudioai/sim's code at commit df7709b](https://github.com/simstudioai/sim/tree/df7709bf5be6a42d51c5289364b98d32c4d38240)

### Which was updated more recently, platform or sim?

Both got their last push on November 2, 2026.

The proof: [simstudioai/sim's commits on GitHub](https://github.com/simstudioai/sim/commits)

### Which has more commits signed by AI, platform or sim?

sim: an AI signed 5.3% of its commits, with Claude Code, Cursor, and Codex; in platform, 0.5%.

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

## Sources

- hcengineering/platform: Read on November 2, 2026, at commit 6eeec00 (https://github.com/hcengineering/platform/tree/6eeec00427f55b5113ea6aee46a92f22d1eec307)
- simstudioai/sim: Read on November 2, 2026, at commit df7709b (https://github.com/simstudioai/sim/tree/df7709bf5be6a42d51c5289364b98d32c4d38240)

## 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.