How OpenAI scaled to 900 million weekly users with Ory

OpenAI partnered with Ory to rebuild its identity stack around a hardened, standards-based system.

The new setup supports horizontal scaling, self-hosting, better observability, and zero-downtime migration.

It replaced a legacy login flow that struggled to keep up as ChatGPT grew to 900 million weekly active users.

The move highlights how large AI platforms can reduce vendor lock-in while improving security and engineering speed.