Pre Seed · AI & Machine Learning · Amsterdam, Netherlands · Founded 2023 · 4–10 employees
LangWatch is an Amsterdam-based AI developer tooling startup focused on LLM observability, evaluation, and agent testing, helping engineering teams monitor, debug, and improve large language model applications through real-time metrics, simulations, and comprehensive quality workflows; founded in 2023 and backed by a €1M pre-seed round with investors including Passion Capital, Volta Ventures, and Antler.