Source: https://seerepo.com/compare/gitroomhq/postiz-app/vs/simstudioai/sim
Markdown source: https://seerepo.com/compare/gitroomhq/postiz-app/vs/simstudioai/sim.md
Description: postiz-app and sim share 8 technologies: Next.js, React, Redis, Postgres, Stripe, OpenAI, MCP, and Resend. Both are written in TypeScript.

# postiz-app vs sim

postiz-app and sim share 8 technologies: Next.js, React, Redis, Postgres, Stripe, OpenAI, MCP, and Resend. Both are written in TypeScript.

- [gitroomhq/postiz-app](https://seerepo.com/r/gitroomhq/postiz-app): 📨 The ultimate agentic social media scheduling tool 🤖
- [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: Next.js, React, Redis, Postgres, Stripe, OpenAI, MCP, Resend
- Only in postiz-app: Sentry, Google, Node.js
- Only in sim: FastAPI, MongoDB, PostHog, Anthropic, AWS S3

## Side by side

| | postiz-app | sim |
|---|---|---|
| Size | 132,403 lines written, 780 code files | 4,073,540 lines written, 10,948 code files |
| Who writes it | 11.5% of its commits signed by AI. With Claude Code and GitHub Copilot | 5.3% of its commits signed by AI. With Claude Code, Cursor, and Codex |
| Activity | Last push October 31, 2026, 2,715 commits, 40,328 stars | Last push November 2, 2026, 8,178 commits, 29,966 stars |
| Tests | 0 test files | 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, postiz-app or sim?

sim, with 4,073,540 lines written in 10,948 code files; postiz-app has 132,403 in 780.

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

### Which has more GitHub stars, postiz-app or sim?

postiz-app, with 40,328 stars; sim has 29,966.

The proof: [gitroomhq/postiz-app on GitHub](https://github.com/gitroomhq/postiz-app)

### Which has more tests, postiz-app or sim?

sim, with 3,682 test files.

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

### Which was updated more recently, postiz-app or sim?

sim: its last push was on November 2, 2026, and postiz-app's on October 31, 2026.

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

### Which has more commits signed by AI, postiz-app or sim?

postiz-app: an AI signed 11.5% of its commits, with Claude Code and GitHub Copilot; in sim, 5.3%.

The proof: [the commits each tool signed in gitroomhq/postiz-app](https://seerepo.com/r/gitroomhq/postiz-app/ai)

## Sources

- gitroomhq/postiz-app: Read on October 31, 2026, at commit be5900f (https://github.com/gitroomhq/postiz-app/tree/be5900f78a366954bccbbefa3e2244be4463a2b4)
- 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.