World's most accurate LLM evals API

Deterministic scoring architecture that's nothing like LLM as Judge.
3x accuracy. 10x faster. Effortless to use.

Agents can't work without deterministic evals

Manual checks take weeks. LLM as Judge is slow, expensive & 70% accurate. Teams shipping to production need instant, deterministic 95% accuracy.

The evaluation layer designed for the agentic era

Used by leading AI teams to power unit tests, benchmarking, monitoring & real-time guardrails

Ship 10x faster

Instant scores on every change, not 2 week manual review cycles

Catch issues instantly

Real-time monitoring finds problems before customers do

Prove quality with data

Show quantitative metrics to win & retain customers

Composo Align achieves SOTA performance on real-world benchmarks

We're trusted by the best teams in AI

Proven results across startups & enterprises in the most complex verticals

"We were finding LLM as a Judge far too unreliable - the same response would score 40% one day and 70% the next. Composo gave us the deterministic scoring we needed to actually track improvements. Game changer for our ML team."

Senior ML Engineer

Fortune 500 Financial Services

"This is awesome. We replaced our entire LLM-as-judge system in one afternoon. We just run all our outputs through Composo and get super powerful metrics on performance. Why would anyone do it the old way?"

CTO

Series B Healthcare AI Startup

"Our enterprise clients demand quantitative proof that our AI agents are accurate. Composo's 92% accuracy finally gave us the hard metrics we needed to prove our system delivers on its promises."

VP of Product

Legal Tech Company

"We cut our QA cycle time by 70%. Instead of relying purely on human review, now we instantly know which prompts are failing and why. The detailed analysis helps us fix issues before they hit production."

Head of AI Engineering

Enterprise SaaS platform