Union.ai is the enterprise Flyte platform.

Union.ai outperforms any OSS alternative on scale and performance in production. It supports 50K+ actions per workflow, 10,000+ concurrent actions per run, and cold start under 5 seconds. Reusable warm-start containers, per-action GPU and CPU profiling, cost attribution per team and workflow, and fail-fast resource validation at launch are the capabilities that separate a platform you can run experiments on from one you can run a business on.

Most orchestrators launch a new Kubernetes pod per action, ~10 seconds of overhead before your code runs. Union.ai supports reusable containers: warm containers you can use across similar tasks. Cold start drops to under 100ms and GPU stays allocated across invocations. For teams building agentic AI, RAG pipelines, or multi-step inference workflows, this adds essential production efficiency.

Flyte workflows run on Union.ai without rewriting. The SDK is compatible and the authoring model is identical. The migration is mostly operational and straightforward. Most teams run their first workflow on Union.ai within an hour of starting setup.

Flyte OSS is free to license. Operating it (or any open-source orchestrator) is not free. A stable production deployment requires a significant amount of manual maintenance that gets more costly as you scale. Engineers must manage Helm values, Postgres, ingress config, a separate secrets solution, an external log aggregation stack, and ongoing K8s maintenance. Union.ai offloads this maintenance so your team focuses on workflows, not infrastructure. The break-even on engineer time tends to come faster than most teams expect.

Scale is one part of the value. The features that tend to matter first for smaller teams are data lineage, persistent logs and built-in observability, and managed secrets that pass a security review without custom engineering. RBAC and cost attribution matter as soon as a second team starts touching the same platform. The operational overhead of self-managed Flyte tends to grow faster than the team itself does.

Union’s zero trust security architecture means data NEVER transits outside your secure cloud. No model weights, pipeline outputs, or execution logs leave your environment. This is more secure than the industry status quo, where you’re required to trust a vendor to handle your data safely.