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LLM app evaluation you can trust.

Evaluate the accuracy & quality of complex, LLM-based applications without having to rely on LLM as a judge or manual 'vibe-checks'.

Working with leaders from companies like:

We get it, evaluating the accuracy & quality of LLM apps is tough.

You need precise, consistent & completely customizable metrics that you can 100% rely on. LLM-based evals can't do this.

Everything else you'll find is LLM as a judge. This isnt.

Our models leverage a unique architecture and are custom-trained for evals so that they can be guaranteed upon to get the scores right.

build around...

Unique, research-backed approach

Composo Align is the result of our extensive R&D and the latest research from the leading AI labs.

Testing in progress...

Completely customizable

Composo Align is designed to evaluate any custom criteria & can be fine-tuned specifically for your use case.

Easy to use

Seamlessly integrate Composo via our API or use our no-code evaluation platform.

learning curve

Why companies choose Composo

Composo gives you precise, consistent evals you can rely on.

Simple to set up

Integrate Composo via API with just a few lines of code. No need for special libraries or SDKs.

Data security first

We're well-used to complex, sensitive use cases & working with enterprises in high-stakes domains such as finance, legal, healthcare & defence. Let us know your requirements.

Accurate & deterministic

Our evals give you precise, continuous scores from 0 - 1 on any custom criteria, that are explainable, deterministic & always right.

Any application (inc. agents)

Composo works with anything from chatbots & copilots to code generation & unstructured data extraction. We also support RAG, agents, tool usage and function calling.

Industry leading research

We go beyond using LLMs as judges and ground-truth comparisons, incorporating state-of-the-art hallucination detection and custom-trained evaluation models to deliver the best performance.

Custom to your company & domain

Our models learn to emulate the judgement of your human experts in even the most complex domains. Specifically designed to work with minimal data upfront.

Scores & analysis that are always right.

all your apps

Our Blog

Our Team

seb

Sebastian Fox

CEO

Ex-McKinsey & QuantumBlack
Oxford University

Hao

Haoguo Wu

Founding Engineer

Ex-Tesla & Alibaba Cloud
Imperial College London

luke

Luke Markham

CTO

Ex-Graphcore ML Engineer
Oxford University

Start using Composo today

With evaluations built specifically for complex, highly specific domains, we make
it easy to deploy LLM applications with 100% confidence.