# Agent-S vs UI-TARS-desktop
_Browser & Computer Use · independent comparison_

> Agent-S and UI-TARS-desktop are both open-source browser & computer use you can self-host for free. UI-TARS-desktop has wider GitHub adoption — 39k stars vs 12k. 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)

**UI-TARS-desktop**
- Open source · Agent · 39k★ · TypeScript · Apache-2.0 · active 15 days ago
- Best for: Vision-driven GUI automation across desktop, browser, and terminal.
- [listing](https://agentsearchengine.app/agents/ui-tars-desktop) · [official](https://agent-tars.com)

## Key differences

- UI-TARS-desktop has wider GitHub adoption — 39k stars vs 12k.
- Agent-S is written primarily in Python; UI-TARS-desktop in TypeScript.

## Which to choose

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

**Choose UI-TARS-desktop if:** Vision-driven GUI automation across desktop, browser, and terminal.

## FAQ

**What's the main difference between Agent-S and UI-TARS-desktop?**
UI-TARS-desktop has wider GitHub adoption — 39k stars vs 12k.

**Is Agent-S or UI-TARS-desktop better?**
Neither is universally better. Agent-S is the stronger fit for Benchmark-leading computer-use automation driven by screenshots; UI-TARS-desktop for Vision-driven GUI automation across desktop, browser, and terminal. Use the side-by-side specs to decide by your own constraints.

**Is Agent-S or UI-TARS-desktop free?**
Agent-S is free to run and self-host; UI-TARS-desktop 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 UI-TARS-desktop?**
By GitHub stars — a proxy for open-source adoption — UI-TARS-desktop is ahead (39k vs 12k). Stars measure attention, not necessarily the better fit for you.

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