simstudioai/sim
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
⚡ Executive Summary & Quick Facts
Authoritative Sourcesim is sim is an open-source project written in TypeScript: Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.. It provides a free, self-hosted open-source alternative to OpenAI API & ChatGPT.
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), simstudioai/sim has accumulated 29,809 GitHub stars and 3,853 forks. It is written in TypeScript, licensed under Apache-2.0, and ranks #568 globally. It is actively maintained with the latest commit recorded on Oct 12, 2026.”
| Repository | simstudioai/sim ↗ |
|---|---|
| Primary Category | agent workflow |
| Language & Stack | TypeScript |
| Software License | Apache-2.0 |
| Community Traction | ★ 29.8K stars · ⑂ 3.9K forks · #568 globally |
| Maintenance | ● Active (Last commit: Oct 12, 2026) · 350 open issues |
| Replaces SaaS | Open Source OpenAI API & ChatGPT Alternative (Pay-per-token pricing with zero private data guarantees) → |
| Target Audience | Developers and engineering teams building with TypeScript, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 90/100 · Grade AYes, sim is actively maintained. Continuous telemetry recorded the last code commit on Oct 12, 2026 (31 days ago). Supported by 29,809 stars and 3,853 community forks, this repository holds a calculated health index of 90/100, reflecting regular maintenance (31 days ago) and active community feedback (350 open).
Star History
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+0
STARS · LAST 30 DAYS
1
PER DAY
#120
MOST-STARRED TypeScript
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +0 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +193 |
sim gained 0 stars in the last 30 days, about 1 a day, and now has 29.8K. It is about 2 years old and has averaged roughly 14.9K stars a year. It ranks #120 among TypeScript repositories and #568 across all languages on GitHubRepo.
Trending Record
43
DAYS ON TRENDING
#379
BEST RANK
Sep 26, 2026
FIRST APPEARANCE
Active
STATUS TODAY
sim has maintained a continuous presence across global trending indexes, peaking at #379. Below is the 30-day activity profile:
💡 Overview
sim is an open-source project written in TypeScript: Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
Engineered for speed, consistency, and developer ease, it solves common hurdles in agent-workflow, agentic-workflow, agents. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in TypeScript for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ npm install sim⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Node.js >= 18, npm, pnpm or bun
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
sim coordinates its core functionality through a modular TypeScript pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with sim.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install sim using your package manager: `npm install sim`
Initialize your project workspace or configuration file for sim.
Import sim into your codebase or invoke it directly from your terminal.
Execute your test suite or run `sim --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with TypeScript, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
simstudioai/sim is currently ranked #568 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #563 | square/leakcanary | Kotlin | ★ 30K | Compare ↗ |
| #564 | sampotts/plyr | JavaScript | ★ 30K | Compare ↗ |
| #565 | karakeep-app/karakeep | TypeScript | ★ 30K | Compare ↗ |
| #566 | micro-editor/micro | Go | ★ 29.9K | Compare ↗ |
| #567 | apolloconfig/apollo | Java | ★ 29.8K | Compare ↗ |
| #568 | simstudioai/sim This Project | TypeScript | ★ 29.8K | |
| #569 | signalapp/Signal-Android | Kotlin | ★ 29.6K | Compare ↗ |
| #570 | ente/ente | Dart | ★ 29.6K | Compare ↗ |
| #571 | composer/composer | PHP | ★ 29.6K | Compare ↗ |
| #572 | goharbor/harbor | Go | ★ 29.6K | Compare ↗ |
| #573 | chroma-core/chroma | Rust | ★ 29.6K | Compare ↗ |
Frequently Asked Questions
What does sim do? +
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
Is sim actively maintained in 2026? +
Yes, sim is actively maintained. The latest code push was recorded on Oct 12, 2026 (31 days ago). It holds a calculated Maintenance Health Score of 90/100 (A rating) with 29,809 stars and 350 open issues.
What language is sim written in? +
The primary language is TypeScript. Topics include: agent-workflow, agentic-workflow, agents, ai, aiagents.
How many stars does sim have? +
sim has 29,809 stars and 3,853 forks on GitHub.
How does sim rank among GitHub repositories? +
With 29,809 stars, simstudioai/sim is ranked #568 globally across all repositories tracked on GitHubRepo and #120 among TypeScript projects.
What license is sim distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
