SAN FRANCISCO, March 18, 2026 (GLOBE NEWSWIRE) -- Respan, the first proactive AI observability platform that closes the loop from evals to production, announced today that it has raised $5M in funding from Gradient, Y Combinator, Hat-Trick Capital, XIAOXIAO FUND, Antigravity Capital, and Alpen Capital along with prominent angels and AI founders. The company will use the funds for hiring and continuing to scale its AI observability platform.

Respan (previously known as Keywords AI) is also launching a first-of-its-kind automated evaluation agent that lets teams define success with metric-first workflows, continuously evaluates production agent behavior, and turns results into actions teams can ship, prompt updates, regression checks, and automated alerts when quality drifts. Respan is trusted by 100+ AI startups as well as enterprise teams. Today, Respan processes 1B+ logs and 2T+ tokens every month, supporting 6.5M+ end users. The company has experienced more than 8x revenue growth YoY in 2025.

Many teams today use observability and evaluation tools like LangSmith or Braintrust. These tools provide traces, metrics, and AI-based evals that help teams inspect failures and measure quality. But structurally, they stop too early. They answer retrospective questions such as what happened or how this version scored, but they leave the hardest questions unanswered once agents scale.

To manage agents over time, teams need a system that tightly connects Observability, Evaluations, Decisions and Iteration. This system must understand full agent behavior, explicitly handle non-determinism, and evolve alongside the agent itself.

Respan is built to ...