MiSSIOn: Rigorous, high-quality testing for Gen AI applications.

From lab chaos to production calm, with a platypus in tow.

OUR VALUES
Make testing meaningful

We design evaluations around real use cases — not just benchmarks. Because impact depends on context.

Trust through transparency

We make results interpretable and decisions explainable. Good testing informs better choices.

Build for collaboration

We speak the language of product, engineering, and compliance — and help them work together.

Clarity over assumptions

We break down vague expectations into measurable criteria. Clear expectations lead to better systems.

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OUR STORY

We’re a team of digital engineers

Rhesis was started by engineers who’ve spent years building and shipping digital products, AI systems included. We’ve seen firsthand how Gen AI applications break in production when they aren’t properly tested. That’s why we built Rhesis: to give teams the tools to validate Gen AI like any other critical software component. No marketing noise, no hand-waving just a clear focus on making Gen AI reliable, safe, and aligned with real business needs. We collaborate closely with the open-source community and industry partners to make sure our tools stay practical and grounded.

Built by developers

We've lived through the pain of inadequate Gen AI testing tools. Rhesis emerged from real frustration with manual testing approaches that couldn't scale with AI complexity.

Open-source foundation

Our code is public, our development is transparent, and our community shapes the roadmap. Sophisticated testing shouldn't be locked behind proprietary walls.
OUR VISION

Testing that fits real-world Gen AI development.

Gen AI is moving fast, but production environments come with real constraints: business logic, compliance rules, customer expectations, and risk. Our vision is simple—make testing fit those realities, not the other way around. We’re building a future where Gen AI teams don’t have to choose between speed and safety. With accessible, open-source QA tooling, developers can validate applications against the things that actually matter: unreliable behavior, harmful outputs, or business misalignment.

Collaborative by design

Testing shouldn't live in engineering silos. We've built tools that let legal, marketing, compliance, and domain experts contribute their expertise without writing code.

Scale your testing

Your AI can handle millions of requests. Your testing should generate thousands of scenarios automatically, not dozens manually. That's the future we're building.
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Join our community

Learn how Rhesis is powering safer Gen AI deployments and driving innovation in production readiness. Join our community on Discord.