How to Build an App Like Character.AI: Architecture, Tech Stack, Cost & Timeline (2026)

How to Build an App Like Character.AI: Architecture, Tech Stack, Cost & Timeline (2026)

How to Build an App Like Character.AI (2026) Character.AI reached 20 million daily active users faster than almost any consumer app in history. Its core promise — persistent, personalised AI characters that hold memory and develop over time — turned out to be one of...