H Company

H was founded in 2023 in Paris. Public reporting identifies the founders as Charles Kantor, Laurent Sifre, Karl Tuyls, Daan Wierstra, and Julien Perolat.

H publicly launched in Paris and announced a $220 million seed round. The company described itself as a global foundation model and agentic AI company.

H announced a $220 million seed round shortly after its inception. Reporting at the time described it as one of the largest seed rounds in Europe for an AI company.

Three cofounders — Karl Tuyls, Daan Wierstra, and Julien Perolat — left H due to reported operational differences. The company said Laurent Sifre and Charles Kantor would continue leading H.

H was reported to have quietly acquired Mithril Security, a Paris-based company. The report identified the deal as an acquisition by H and said it had been completed without a public announcement at the time.

H announced the appointment of Gautier Cloix as chief executive officer. The company’s blog post states that co-founders Charles Kantor and Laurent Sifre made the appointment announcement.