Evaluate LLM apps with superhuman quality & speed

Replace manual, human vibe-checks with our custom-built AI models.
Designed to evaluate the most complex & subjective applications.

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

Human vibe-checks on quality don't scale, and generic evals don't work well for complex, subjective applications.

Composo's custom AI models make evaluation easy.

We have developed the highest quality evaluation methods you can find, and put them in a platform that’s extremely easy to use.

build around...

Powerful evaluation

Proprietary, research-backed methods that are better than a human.

Testing in progress...

Completely personalised

Based on models we custom build for you, which learn to your app over time.

Easy to use

Run evaluations without code, or just use our API directly.

learning curve

How it works

Why companies choose Composo

Composo is hyper-personalised evaluation that you can rely on.

Simple set up

With a simple setup, just three lines of code are needed to link an app, allowing you to run evaluations straight out of the box.

No code or direct to API

There’s no need to leave Composo to run evaluations or iterate on app parameters such as prompts, models, or RAG settings. Or just use our API and plug it directly into your stack.

Collaborate in your team

Engineers can keep modifying code in their environment, while others easily iterate and evaluate within Composo, enabling smooth collaboration between engineering and product teams.

Any application

Our solution works with any application, from chatbots to copilots, and supports complex setups including agents, RAG, and tool integrations.

Industry leading research

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

Evals that learn over time

Our custom models learn to emulate human judgment, handling the complexity and subjectivity of LLM outputs with precision.

A smooth, yet
powerful workflow

all your apps

Our blog

Our Team

seb

Sebastian Fox

CEO

Ex-McKinsey & QuantumBlack
Oxford University

luke

Luke Markham

CTO

Ex-Graphcore ML Engineer
Oxford University

Ready to try Composo?

No additional steps, complexity, or changes to how you already work. Start using Composo today and build the future of AI.

faqs

FAQs

How secure is my data?

At Composo, data security is our top priority. We serve many enterprise customers in regulated industries and employ robust measures to safeguard your information.

Your application runs entirely on your own server and Composo only has access to inputs and outputs, never your underlying data or systems.

For highly sensitive data, we recommend anonymization. However, we also offer end-to-end encryption and dedicated instances where absolutely necessary.

Can Composo deploy on my company's infra?

Yes. Reach out to us to discuss further!

Does Composo work for complex applications such as agentic systems?

Yes, Composo is designed to be completely flexible to handle any complexity of application, whether it has agents, retrieval-augmented generation (RAG), tool use, or anything else.

It provides the ability to test and optimize both full end-to-end performance, as well as to isolate and evaluate the performance of individual components or agents within a GenAI system.

Sounds interesting?

Let’s get in touch, we’d love to learn about what you’re building!

Contact Us

Start using Composo today

With evaluations built specifically for complex, highly specific domains, we make
it easy to take your GenAI apps testing to the next level.