I did a quick search and it looks like A LOT of business use it (not 100% on the source,but it gives an idea ). Also looking at Persona's website, that includes OpenAI: `OpenAI uses Persona to screen millions of users each month with zero friction` [1] https://data.landbase.com/technology/persona/ [2] https://withpersona.com/customers/openai [3] https://withpersona.com/customers