# three.dev

> Find out how your AI agent fails. Before your users do.

- **Website**: https://three.dev/?utm_source=uneed&utm_medium=referral&utm_campaign=v1-open-signup-launch&ref=uneed-v1-open-signup-launch
- **Uneed Page**: https://www.uneed.best/tool/three-dev
- **Pricing**: Freemium
- **Category**: Development
- **Tags**: Analytics, AI, AI Agents
- **Submitted by**: @bryan.lee08-53b4
- **Launch Date**: 2026-11-12
- **Social Links**: [Twitter](https://x.com/round3ai) | [LinkedIn](https://www.linkedin.com/company/round3-ai-inc) | [GitHub](https://github.com/round3ai) | [YouTube](https://www.youtube.com/@round3ai)

## About

Almost every team now runs AI in production, but few know how it behaves once real users show up. The failures are quiet: a wrong refund policy, a made-up order status. Nothing crashes, so you hear about it from your users.

three.dev finds those failures in your live traffic on its own and groups them into failure modes, ranked by severity, each with the real conversations behind it. Setup is one prompt to Claude Code, Cursor, or Codex, with no added latency. Then hand the top failure to your coding agent over MCP, and it proposes a targeted fix.

Launch offer: sign up by Nov 22 and the Starter plan is free for six months.