AI Plugin IndexReact vs Harness
React and Harness are both ai and llm tools MCP servers. Harness scores higher (95 vs 80 out of 100). Harness has more GitHub stars (1.3k), and React was updated more recently (today). The table compares them side by side.
| React | Harness | |
|---|---|---|
| Score | 80 / 100 | 95 / 100 |
| What it does | Run a FrontMCP server inside a React app: provider, hooks, components and AI SDK integration | Start Claude Code and Codex agents the person can watch, wait for them and read their answers. |
| Publisher | Verified: npm:@frontmcp | Verified: harness.autonomous.ai |
| Grades | Maintenance A, Licence A, Quality B | Maintenance A, Licence A, Quality A |
| npm downloads a week | 399 | Not on npm |
| Runs | Local | Local |
| Works with | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf | Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI, VS Code, Windsurf |
| GitHub stars | 146 | 1,320 |
| Last commit | 20 Oct 2026 | 19 Oct 2026 |
| Licence | Apache-2.0 | MIT |
| Listed since | 20 Oct 2026 | 19 Oct 2026 |
| Install React | Install Harness |
Questions
Is React or Harness more popular?
Harness has more GitHub stars: 1,320.
Can I use React and Harness together?
Yes. AI assistants can load several MCP servers at once. Install both and the assistant picks the right one for each task.