Character.AI

Leading consumer AI character platform with one of the highest user engagement rates among generative AI products, particularly dominant with Gen Z users

Character.AI is a consumer AI platform that allows users to create, customize, and interact with AI-powered characters — ranging from fictional personas and celebrities to educational tutors and companionship bots. Founded in 2021 by former Google Brain researchers Noam Shazeer and Daniel De Freitas, the platform rapidly amassed one of the largest user bases in the generative AI space, particularly among Gen Z audiences, with reported session times rivaling major social media platforms. In August 2024, Google entered into a landmark licensing deal with Character.AI, bringing the founding team and key researchers back to Google while the Character.AI platform continued to operate independently under new leadership. This structure — sometimes described as a 'reverse acqui-hire' — left Character.AI as a standalone company with its technology and user base intact, while Google gained access to its IP and talent. The company has faced scrutiny over user safety, particularly regarding minors' interactions with AI characters, prompting policy changes and parental controls. It is increasingly relevant to the advertising and marketing ecosystem as a high-engagement platform exploring monetization strategies including subscriptions and potentially brand-integrated AI characters. Its massive, highly engaged user base — especially younger demographics — makes it a significant emerging platform for marketers and brand strategists to watch.