Humanloop

Humanloop spun out of University College London in 2020 and built tooling for the unglamorous work of shipping LLM features: prompt management, evaluation, and observability, with customers including Duolingo, Gusto, and Vanta. It raised about 44 million dollars, including a 36.2 million dollar Series A in May 2025. Three months later, in August 2025, Anthropic hired the founders and roughly a dozen staff, pointedly without buying the company's assets or intellectual property. With the team gone, Humanloop shut its platform on September 8, 2025 and deleted customer data, the value having walked out the door in people rather than code. Raising a large Series A and disappearing inside a single quarter made it one of 2025's cleaner illustrations of the acqui-hire as an exit.

Founded

2020-01

Shut down

2025-09-08

Funding raised

$44M

Years alive

6

Founders

Raza Habib, Peter Hayes, Jordan Burgess