Safe foundations for an AI-built world.
AI will build most of tomorrow's software and run on most of tomorrow's infrastructure. We're making sure that stack is correct — from the agents that write code, to the models that power them, to the runtimes that deploy them.
AI agents are heading toward full autonomy — writing, testing, and shipping software without supervision. For that to work, we need to trust the code they produce. Today, more AI-written code means more bugs and technical debt. This creates a bottleneck on human developers to review and fix the code.
We make AI-built software correct so it can become autonomous. As we work towards correctness, we build agents that are more productive and produce higher quality work compared to general-purpose agents.
Our technical foundation is OCaml — its strong compile-time guarantees, culture of testing and correctness, and credible path toward formal verification make it the right base for building AI systems we can trust.
We're also building the developer tools that make this possible — testing, benchmarking, linting, and eventually formal verification tooling — all designed for AI-first usage. The agent is only as good as the feedback loops it can rely on.
Generic frontier models aren't optimized for typed languages, build systems, or verification workflows. We fine-tune and evaluate models specifically for OCaml and correctness-sensitive development.
This, in turn, gives us a path towards local or self-hosted models that perform as well or better than generic models.
AI workloads are becoming a dominant share of computing infrastructure, and that share is only growing. At this scale, every layer of unnecessary complexity compounds — in cost, in latency, in attack surface. Today's stack wasn't built for this: general-purpose operating systems, container runtimes, and virtualization layers add overhead that made sense for general computing but not for a world where most machines run AI.
We're building infrastructure purpose-built for AI: models compiled ahead-of-time and deployed as self-contained binaries or unikernels, running directly on, or as close as possible to hardware. The result is faster, cheaper, and significantly more secure infrastructure.
Terminal UI framework for OCaml. The foundation for our agent interfaces.
Unified testing for OCaml. Assertions, property-based testing, snapshot testing, expect tests, code coverage — one library.
Low-noise micro-benchmarking for OCaml. Performance regressions become build failures, improvements auto-promote.
We're looking for design partners — OCaml teams and correctness-sensitive organizations who want to shape these tools with us. Reach out at hello@invarianthq.dev.
Invariant is founded by Thibaut Mattio. He led the OCaml Platform initiative at Tarides, launched the new OCaml.org, and previously worked on NLP and computer vision at Keatext and PatSnap.