OpenAI replaced its legacy login system with Ory Hydra to handle explosive user growth, scaling from 100 million to over 900 million weekly active users. The migration was completed with zero downtime, giving OpenAI full control over identity data, observability, and deployment flexibility. Key benefits included avoiding vendor lock-in, enabling a small security team to manage nearly a billion identities, and accelerating engineering velocity by offloading identity infrastructure complexity to Ory's battle-tested open-source stack.
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The Challenge: Scaling through a “success disaster”The results: Infrastructure for the next billionTake the next step with OrySort: