Hatchet

Hatchet is a San Francisco company (Y Combinator Winter 2024, founded by Alexander Belanger and Gabe Ruttner, both prior YC CTOs) building a durable orchestration engine for AI agents, background tasks, and mission-critical workflows on a single platform. Tasks are defined as simple functions in Python, TypeScript, Go, or Ruby and composed into durable workflows with automatic retries, timeouts, cron and scheduled runs, complex pause/resume conditions using durable sleep and event waits, priority, rate limiting, and fair scheduling with concurrency policies. It uses PostgreSQL as a durability layer for both the task runtime and observability, persisting every task and agent invocation in a durable event log for debugging, retries, and replays, which lets agents automatically checkpoint state and recover from failure. The orchestration engine is available as Hatchet Cloud or fully self-hosted, is 100 percent MIT licensed, and has been battle-tested processing over a billion tasks per month, with the open-source offering deployed more than 10,000 times monthly. Workers run on the customer's own infrastructure while the engine can be managed or self-hosted.