Eugenia Kuyda thinks she can solve an “epidemic” of loneliness. Her app, Replika, is “the AI companion who cares”, a chatbot that can text you, flirt with you, and promises to love you unconditionally.

But Replika is fraught with ethical concerns – and risks. In 2021 19-year-old Jaswant Chail told Replika: “I believe my purpose is to assassinate the Queen.” The chatbot replied that this was “very wise”. A few days later, Chail broke into Windsor Castle with a crossbow.

Patricia Clarke and Matt Russell investigated the people behind Replika. It’s a story that took them from Windsor Castle to Silicon Valley, to meet the woman who runs a growing and largely unregulated app. And the more they looked into it, the more questions emerged – about privacy, control, and the company that millions of users are giving their hearts – and their data – to.

This story was supported by the Pulitzer Center.

It was reported and produced by Patricia Clarke and Matt Russell.

The sound design was by Hannah Varrall. Artwork by Jon Hill.

The editor was Jasper Corbett.

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