Atla

Atla is the eval and improvement platform for AI agents. We help teams find and fix agent failures—fast. As agents grow more complex, debugging and improving them has become a significant challenge. Atla brings clarity by tracing every step, surfacing error patterns across runs, and delivering specific suggestions to improve agent performance. With real-time monitoring, automated error detection, and tools for prompt experimentation, Atla gives teams the visibility and control needed to confidently ship agentic systems that work. We’re a team of researchers, engineers, entrepreneurs and operational leaders. Our expertise in evals was honed through training our own purpose-built LLM Judges, Selene and Selene Mini, which are available open-source and have been downloaded 40,000+ times. Atla is backed by Y Combinator, Creandum, and the founders of Reddit, Cruise, Rappi, Instacart and more.