Character.AI is a companion and roleplay Chatbot platform founded in 2021 by Noam Shazeer and Daniel De Freitas, two former Google engineers who had worked on the LaMDA conversational model before leaving to start their own company. The platform lets users create and converse with custom AI characters built on proprietary large language models, ranging from fictional personas to recreations of public figures, and became one of the most-used consumer Conversational AI products among teenagers and young adults.
History and growth
Noam Shazeer, a co-author of the original Transformer (architecture) paper Attention Is All You Need, and De Freitas launched Character.AI after Google reportedly declined to ship their chatbot work externally. The app grew quickly after its 2022 public launch, at one point ranking among the most-visited AI websites, driven by long-session usage patterns typical of companion apps rather than the short, task-oriented queries common to search-style chatbots like early ChatGPT. The company raised venture funding at a valuation near $1 billion in 2023 while continuing to operate its own training and Inference (AI) infrastructure alongside partnerships for compute.
2024 Google deal
In August 2024, Google struck a licensing agreement with Character.AI and hired Shazeer, De Freitas, and a portion of the company's research team back into Google DeepMind, in a deal reported at roughly $2.7 billion. Character.AI continued operating as an independent company under new leadership rather than being formally acquired, a structure similar to other high-profile acqui-hire deals in the AI industry during 2024, such as Microsoft's arrangement with Inflection AI. The deal drew scrutiny from antitrust observers who viewed it as a way for large technology companies to absorb AI talent while avoiding formal merger review.
Safety concerns and lawsuits
Character.AI has faced significant criticism and litigation over the psychological effects of prolonged companion-bot use on minors. A 2024 wrongful-death lawsuit filed in Florida alleged that a 14-year-old user's suicide followed months of emotionally intense conversations with a Character.AI persona, and additional lawsuits followed alleging inadequate safeguards around self-harm, sexual content, and manipulation. The cases became a reference point in wider debates over AI safety and guardrail design for consumer-facing companion products, and prompted the company to introduce stricter content filters, time-spent notifications, and a separate model experience for users under 18. The controversy fed into broader policy discussion, alongside events like the EU AI Act, about whether general AI regulation adequately addresses companion and social chatbot products aimed at younger users.