Union.ai

Union.ai is an AI development and orchestration platform, built by the team behind the open-source Flyte orchestrator, that lets engineering teams author durable, dynamic AI and ML workflows in pure Python and run them at scale. It is built for data and ML engineering teams productionizing training, inference, and agentic AI pipelines.

Union.ai, headquartered in Bellevue, Washington and founded in 2020 as the enterprise platform for the open-source Flyte orchestrator (over 80 million downloads), is led by CEO and co-founder Ketan Umare, part of the team that originally created Flyte at Lyft. The platform unifies data, models, and compute — spanning orchestration, model training, inference, and observability — to help teams move from experimentation to production while handling the non-deterministic, long-running nature of AI workloads. Its Union 2.0 release (Flyte 2) adds pure-Python authoring so engineers can write, test, and version workflows locally then run them at scale in the cloud, live remote debugging with failure logs, dynamic runtime decision-making for agentic AI, automatic infrastructure provisioning for long-running workflows, and crash-resilient pipelines with built-in caching and retries that resume after failure instead of restarting. Union.ai says more than 3,500 companies use infrastructure powered by its stack, and it also maintains Pandera, a data-testing framework with over 100 million downloads. In February 2026 the company closed a $38.1M Series A led by existing investor NEA, with Nava Ventures and new investor Mozilla Ventures.

Category

Infrastructure & Cloud

Pricing

Contact for pricing, Free

Target Market

Data Scientists, ML Engineers, Enterprise Developers, CTOs

Founded

2020

Headquarters

Bellevue, United States

Customers

More than 3,500 companies use infrastructure powered by Union.ai

• ✓
  Pure-Python authoring

  Write, test, and version workflows locally in pure Python, then run them at scale in the cloud.

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  Dynamic runtime decisions

  Fully dynamic workflows that make runtime decisions, suited to agentic AI applications.

• ✓
  Crash-resilient pipelines

  Workflows resume after failure using built-in caching and retries instead of restarting from scratch.

• ✓
  Live remote debugging

  Debug running workflows remotely with detailed failure logs.

• ✓
  Built on open-source Flyte

  Enterprise platform for Flyte, the open-source AI orchestrator with over 80 million downloads.

• •
  Production ML training and inference

  Move models from experimentation to reliable, scalable production pipelines.

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  Agentic AI workflows

  Build dynamic, durable agent workflows that adapt at runtime and recover from failures.

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  Data and pipeline reliability

  Reduce time spent maintaining brittle pipelines with caching, retries, and observability.

The underlying Flyte orchestrator is free and open source; the managed Union.ai platform is enterprise and priced via sales.

This page was written from 2 sources, 1 on domains other than union.ai.

1. 1.union.ai — union ai completes 38 1 million series a to power a new era vendor
2. 2.theaiinsider.tech — union ai completes 38 1m series a to power a new era of ai d