Inngest

Inngest is a durable execution platform that gives developers reliable background jobs, workflows, and AI-agent orchestration without managing queues or infrastructure. Founded in 2021 by Tony Holdstock-Brown and Dan Farrelly, the San Francisco company combines event streams, queues, and durable step functions into SDKs for TypeScript, Python, and Go, plus AgentKit for multi-agent systems. It has raised roughly $30 million, most recently a $21M Series A led by Altimeter in 2025, and processes over 100 million executions a day for teams including SoundCloud, Resend, and Replit.