# Agent-S vs nanobrowser
_Browser & Computer Use · independent comparison_

> Agent-S and nanobrowser are both open-source browser & computer use you can self-host for free. Agent-S is written primarily in Python; nanobrowser in TypeScript. Neither is universally better — pick by fit.

## Side by side

**Agent-S**
- Open source · Framework · 12k★ · Python · Apache-2.0 · active 19 days ago
- Best for: Benchmark-leading computer-use automation driven by screenshots.
- Avoid if: You run multiple monitors — the agent is designed for single-monitor screens.
- [listing](https://agentsearchengine.app/agents/agent-s) · [official](https://www.simular.ai)

**nanobrowser**
- Open source · Agent · 14k★ · TypeScript · Apache-2.0 · active 8 months ago
- Best for: A free in-browser alternative to OpenAI Operator using your own LLM keys.
- Avoid if: You rely on small local models — they need cleaner prompts and more iterations.
- [listing](https://agentsearchengine.app/agents/nanobrowser) · [official](https://nanobrowser.ai)

## Key differences

- Agent-S is written primarily in Python; nanobrowser in TypeScript.

## Which to choose

**Choose Agent-S if:** Benchmark-leading computer-use automation driven by screenshots.

**Choose nanobrowser if:** A free in-browser alternative to OpenAI Operator using your own LLM keys.

## FAQ

**What's the main difference between Agent-S and nanobrowser?**
Agent-S is written primarily in Python; nanobrowser in TypeScript.

**Is Agent-S or nanobrowser better?**
Neither is universally better. Agent-S is the stronger fit for Benchmark-leading computer-use automation driven by screenshots; nanobrowser for A free in-browser alternative to OpenAI Operator using your own LLM keys. Use the side-by-side specs to decide by your own constraints.

**Is Agent-S or nanobrowser free?**
Agent-S is free to run and self-host; nanobrowser is free to run and self-host. Both are free to self-host — you only pay for the infrastructure and any model or API usage.

**Which is more popular, Agent-S or nanobrowser?**
By GitHub stars — a proxy for open-source adoption — nanobrowser is ahead (14k vs 12k). Stars measure attention, not necessarily the better fit for you.

---
Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/compare/agent-s-vs-nanobrowser