A platform for testing AI agents before they ship and watching them after.
A platform for testing AI agents before they ship and watching them after. An LLM plays the user and holds a multi-turn conversation with your agent — in text or in voice — a judge scores the transcript against criteria you wrote in plain English, and the same scenarios run on your laptop and in CI. Around that sit production tracing, evaluations, prompt versioning, and a gateway that routes and budgets model spend. Open source (Apache 2.0) and self-hostable.
| Industry | AI & Machine Learning |
| Funding | |
| Stage | Pre-Seed |
| Website | Visit LangWatch |
Where LangWatch sits against the other names we cover on this beat. Each line is that company’s verdict, not a summary of it.
The 2026-07-30 print settled four of the five questions the prior dossier said it could
Cash $78.2B