Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Atla

Inactive · The improvement engine for AI agents

WebsiteYC profile

Why it ranks

How the rank works
2signal of 100 · rising 1
  • team of 10Team size · YC's directory+5.4
  • went through YCProgram · this site+4

A sum of public facts, not a judgement and not investment advice.

Competitors

DataInactiveilumadataShared: confidently ship, analytics, errorYC S22LondonStartup →AIMiddlewareShared: error detection, aiops, traceYC W23San FranciscoStartup →AIassistant-uiShared: popular agent, agent framework, langchainYC W25San FranciscoStartup →AIHuman BehaviorShared: know exactly, analyticsYC X25San FranciscoStartup →
Companies closest to Atla
Company
ilumadataShared: confidently ship, analytics, errorYC S22InactiveData, Devtools
MiddlewareShared: error detection, aiops, traceYC W23ActiveAI, Devtools
assistant-uiShared: popular agent, agent framework, langchainYC W25ActiveAI, Devtools
Human BehaviorShared: know exactly, analyticsYC X25ActiveAI, Data, Devtools

Adjacent

AIAcquiredHeliconeShared: aiops, analytics, langchainYC W23San FranciscoStartup →DataInactiveSerialShared: not days, analytics, fixYC W23San FranciscoStartup →AILaminarShared: aiops, fix, agentYC S24LondonStartup →AIThe Context CompanyShared: analytics, fix, agentYC F25San FranciscoStartup →OtherAtlasShared: atlaYC S21SingaporeStartup →
Companies next to Atla
Company
HeliconeShared: aiops, analytics, langchainYC W23AcquiredAI, Data, Devtools
SerialShared: not days, analytics, fixYC W23InactiveData, Devtools
LaminarShared: aiops, fix, agentYC S24ActiveAI, Devtools
The Context CompanyShared: analytics, fix, agentYC F25ActiveAI, Data, Devtools
AtlasShared: atlaYC S21ActiveOther

Also from S23 in AI

All of S23
AIAutomorphicInfuse knowledge into language models with just 10 samplesYC S23San FranciscoStartup →AIBaserunObservability and evaluation platform for LLM apps.YC S23San FranciscoStartup →AIAcquiredChatterDead simple LLM testing and iterationYC S23PhiladelphiaStartup →AIInconvoBuild chat-with-data agents for customer-facing applicationsYC S23LimerickStartup →AIAcquiredCatamaranA regulated marketplace and analytics platform where investors buy…YC S23LondonStartup →AICedanaFast, reliable, reproducible AI with GPU live migrationYC S23New York CityStartup →
Company
AutomorphicInfuse knowledge into language models with just 10 samplesteam of 3ActiveAI, Devtools
BaserunObservability and evaluation platform for LLM apps.team of 2ActiveAI, Devtools
ChatterDead simple LLM testing and iterationacquiredteam of 2AcquiredAI, Devtools
InconvoBuild chat-with-data agents for customer-facing applicationsteam of 2ActiveAI, Data, Devtools
CatamaranA regulated marketplace and analytics platform where investors buy…team of 11acquiredAcquiredAI, Data
CedanaFast, reliable, reproducible AI with GPU live migrationteam of 5hiringActiveAI, Devtools

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.

YC batch
S23 · Summer 2023
Status, per YC
Inactive
Category
AI, Data, Developer tools
Team size
10
Location
London, England, United Kingdom
Checked
6h ago

YC tags: AIOps, Developer Tools, Analytics, AI

Changes seen

TagsOct 19, 2026

No longer tagged Artificial Intelligence.

Source ↗

Atla in S23: 220 companies, 78% AI

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.