LangDB

LangDB belongs in the catalog because it solves a different problem than a classic eval suite or trace-only platform. The checked site positions it as an enterprise AI gateway with observability, real-time debugging, analytics, and unified access to a large model catalog. That matters because many AI teams do not just need traces after the fact. They need a control plane in the request path that can normalize provider access, enforce cost discipline, and give them operational visibility over live traffic.

It also deserves inclusion because the official docs expose a pricing posture that is refreshingly practical. The checked free-tier documentation explains that free usage is limited to 100 LLM calls per day, and that adding credits removes those restrictions without forcing a mandatory monthly subscription. That is useful buyer information. It means LangDB should be understood less like a seat-based SaaS app and more like a gateway product with a lightweight free tier and pay-as-you-go expansion path.