OpenAI.com and ChatGPT.com are two of the most visited websites globally, as of April 2025, according to Wikipedia’s list of most-visited websites. ChatGPT out-ranks familiar sites like X/Twitter, Reddit, Yahoo, TikTok, LinkedIn, and Amazon, securing the 5th most visited spot. OpenAI holds impressive rankings as well, at 44th by Similarweb and 28th by Semrush. Another highly frequented site is Fandom.com, boasting the 37th most visited site by Similarweb.
What do they all have in common?
These sites attract hundreds of millions of users every week, if not every day. All these users require robust authentication and authorization. Such immense scale pushes the limits of traditional homegrown and commercial IAM (Identity and Access Management) software, yet these companies are committed to even greater growth.
Something else they all have in common…
OpenAI/ChatGPT, Fandom, and Axel Springer (serving 400 million users) are all Ory customers. Their stories are consistent: they outgrew their previous authentication and authorization solutions. User delays and disruptions during peak traffic became major concerns, especially since their users could easily switch to alternative services.
So what is next…
Perhaps you're facing similar challenges, or you anticipate them. If you're looking for a solution that offers scale, flexibility, and the ability to customize the user experience to your unique needs, then it's time to explore Ory.
Ory’s large-scale IAM customer stories:
