Chai is an AI platform that uses large language models (LLMs) which users interact with, originally released in 2021.

[1] The principal feature of the app is to provide a platform for users to talk to AI characters.

[2] Chai was founded in Cambridge, England by CEO William Beauchamp.

[3] In December 2024, the Washington Post reported that authorities in Belgium launched an investigation into the company following a complaint.

The investigation, started in July 2024, after a Dutch man died by suicide following extensive chats on the Chai app.