H2O.ai

H2O.ai pairs one of the most battle-tested open-source machine learning stacks, H2O-3, with newer generative tooling. H2O-3 provides distributed algorithms, AutoML leaderboards, and built-in explainability for tabular problems, callable from Python and R, and it has long been a fixture in banking and insurance model stacks.

h2oGPT extends the company into private document intelligence: retrieval and question answering across large PDF corpora using open LLMs, deployable fully on-premises or air-gapped. Driverless AI, the commercial flagship, automates feature engineering and model building with enterprise support attached.

The open-source core is free to self-host, which makes H2O attractive where data cannot leave the building and budgets exclude per-seat SaaS. The tradeoffs are interfaces that feel dated next to newer platforms, a need for genuine data science skill, and enterprise features licensed separately.