YCS23· AI· Data· DevtoolsAtla
The improvement engine for AI agents
Founders
Not read from YC yet; the weekly run fills these in.
Same space
Adjacent
Overlapping tags, a different niche.
HeliconeW23LLM Observability for DevelopersShared: aiops, developer tools, analyticsAcquired
ChatterS23Dead simple LLM testing and iterationShared: aiops, developer toolsAcquired
ilumadataS22Confidently ship analytics code faster with fewer errorsShared: developer tools, analyticsInactive
LiteLLMW23Call every LLM API like it's OpenAI [100+ LLMs]Shared: aiops, developer toolsActive
LangfuseW23Open source LLM engineering platformShared: developer tools, analyticsAcquired
Also from S23 in AI
Batchmates in Summer 2023.
AutomorphicS23Infuse knowledge into language models with just 10 samplesActive
BaserunS23Observability and evaluation platform for LLM apps.Active
InconvoS23Build chat-with-data agents for customer-facing applicationsActive
CatamaranS23The AI-powered risk decision platformAcquired
CedanaS23Fast, reliable, reproducible AI with GPU live migrationActive
CodeStoryS23Aide is an AI-native , privacy-first IDE built on top of VSCodeInactive
About Atla
Find and fix your agent’s most critical failures in hours, not days. Atla helps developers cut time spent on manually reviewing traces. Atla’s LLM judge evaluates your agent step-by-step, uncovers error patterns across runs, and suggests specific fixes—so you know exactly what to fix and why. Atla supports the most popular agent frameworks teams build with, including LangChain, CrewAI, and OpenAI Agents. With real-time monitoring, automated error detection, and 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 60,000+ times.
London, England, United Kingdom
Atla: questions
Which YC batch was Atla in?
Atla was in Y Combinator's Summer 2023 batch (S23).
Is Atla still active?
Y Combinator lists Atla as inactive.
Where is Atla based?
Atla lists London, England, United Kingdom as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.