Open Source Platform & SDK

Testing Gen AI. Collaborative. Adaptive.

Like a platypus, versatile & very effective. We bring different worlds together. Everyone's expertise becomes the testing your Gen AI needs.

Associated with
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Dive Into Testing

Fast, thorough, and surprisingly painless.

Platform

Get Your Whole Team Involved

Your legal, marketing, and domain experts know what can actually go wrong. Make testing everyone's responsibility with sophisticated tools that automatically generate comprehensive test scenarios.

SDK

Test Without Leaving Your IDE

Integrate Rhesis directly into your development workflow. Generate, execute, and analyze tests without leaving your favorite IDE. No jumping between tabs. Just testing that fits how you actually work.

END-TO-END Solution

Full testing cycle coverage

From 'I hope this works' to 'I know this works.' Everything you need to develop and ship with confidence instead of crossed fingers.

Automated scenario creation at scale

Domain-specific testing intelligence

Real-world simulation engine

Clear insights, actionable results

Works with your existing stack

Reliable by design. Fun by Nature.

From 'It works on my machine' to production-ready

You spent weeks and months building something cool. Don't let sloppy testing ruin the release. Your Gen AI deserves testing that's as thoughtful as your architecture.

Advanced testing architecture, collaborative by design.
Built for teams, proven in production.
END-TO-END Solution

How it works

Great AI teams know what they're shipping before users do. Let's turn testing from "crossing fingers" into something as sophisticated as your development process.

Connect application

Our API and SDK work with any Gen AI system, from simple chatbots to complex multi-agent architectures.

Generate tests

Your team defines what matters: legal requirements, business rules, edge cases. We automatically generate thousands of test scenarios based on their expertise.

Define metrics

Set quality benchmarks that actually matter to your team. Track performance, safety, compliance, and user experience with clear analytics.

Improve quality

Receive detailed analysis that help you understand exactly how your Gen AI performs before your users do.

Platypus Pond

Frequently asked questions

Everything you need to know about Rhesis AI, served with a smile.

What's with the platypus?
What makes Rhesis different from other AI testing tools?
Is this really enterprise-ready if it's open source?
What can I actually do with it?
Is there a cloud version?
Blog post image

Our first community hour: Building together

We just hosted our first Community Hour, a new regular virtual meetup for everyone building, testing, and evaluating Gen AI agents and LLM applications. Join our growing community where testing is a collaborative conversation, not an afterthought.Retry
Dr. Nicolai Bohn
November 10, 2025
3 mins
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Self-hosting Rhesis with Docker compose: Our journey to a one-command setup

A behind-the-scenes look at how we made Rhesis run anywhere and what we learned along the way. It started with a simple question from our first Objectives & Roadmap session: "Can I run Rhesis on my laptop without dealing with cloud credentials?"
Md Asaduzzaman Miah
November 12, 2025
11 mins
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From enterprise SaaS to open source: Why we rebranded Rhesis AI

Discover how Rhesis AI pivoted from enterprise SaaS to open source, what drove the rebrand, and the lessons every AI startup can learn about aligning brand, product, and community.
Dr. Nicolai Bohn
October 29, 2025
8 mins