UI-TARS-desktop vs browser-harness
UI-TARS-desktop is the more adopted project, with 39,376 GitHub stars against 18,585 for browser-harness (about 2.1x more). browser-harness was updated more recently (today, against 15 days ago). UI-TARS-desktop is written in TypeScript and browser-harness in Python.
| UI-TARS-desktop | browser-harness | |
|---|---|---|
| Description | The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra | Let Claude Code, Codex or Cursor use your real Chrome, logged in as you. One prompt to set up. Open source, MIT. |
| Author | bytedance | browser-use |
| Stars | 39376 | 18585 |
| Language | TypeScript | Python |
| License | Apache-2.0 | MIT |
| Last update | 2026-10-09T01:29:53Z | 2026-10-24T01:48:48Z |
| Source | https://github.com/bytedance/UI-TARS-desktop | https://github.com/browser-use/browser-harness |
| Stars this week | +73 | +117 |
Which should you choose?
- UI-TARS-desktop describes itself as: "The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra"
- browser-harness describes itself as: "Let Claude Code, Codex or Cursor use your real Chrome, logged in as you. One prompt to set up. Open source, MIT."
Stars measure adoption, not fit. Read both READMEs for the tools each server exposes, then try them side by side in your client: the install guide shows how to add both.
Frequently asked questions
Which is more popular, UI-TARS-desktop or browser-harness?
UI-TARS-desktop has more GitHub stars: 39,376 against 18,585. This week UI-TARS-desktop gained 73 stars and browser-harness gained 117, which says more about current momentum than the all-time total. Both figures are refreshed daily from GitHub.
Are UI-TARS-desktop and browser-harness open source?
UI-TARS-desktop: Apache-2.0 (open source). browser-harness: MIT (open source). An open-source license lets you run and self-host the server at no cost. If either one wraps a commercial API, that provider's pricing still applies, so read each README for the accounts and keys it needs.
Can I use UI-TARS-desktop and browser-harness together?
Yes, if both run as MCP servers. MCP clients such as Claude Code, Cursor and VS Code can connect to several servers at once, and the agent picks tools from each. Give them distinct names in your config, and keep the number of active servers small so tool definitions do not crowd the context window.
Related comparisons
- browser-use vs UI-TARS-desktop
- browser-use vs browser-harness
- chrome-devtools-mcp vs UI-TARS-desktop
- chrome-devtools-mcp vs browser-harness
- payload vs UI-TARS-desktop
- payload vs browser-harness
- UI-TARS-desktop vs invisible_dots
- UI-TARS-desktop vs quasar
UI-TARS-desktop details · browser-harness details · All Browser Automation MCP servers
Data last updated . Stars and downloads are refreshed every day from GitHub and npm.