OpenAI acquires product testing platform Statsig and appoints Statsig CEO as CTO of OpenAI

OpenAI announced on September 2, 2025, that it had acquired Statsig, a product experimentation platform. With this acquisition, Statsig founder and CEO Vijaye Raji will become OpenAI's CTO (Chief Technology Officer) of Applications, overseeing product engineering for products such as ChatGPT and Codex.

Vijaye Raji to become CTO of Applications with acquisition of Statsig | OpenAI
https://openai.com/index/vijaye-raji-to-become-cto-of-applications-with-acquisition-of-statsig/

Statsig is joining OpenAI
https://www.statsig.com/blog/openai-acquisition

Statsig is a platform that offers A/B testing, feature flags, real-time decision-making, and more. When it launched in 2021, it didn't attract much attention , with only one comment on Hacker News , but Statsig has been actively updating its platform and steadily increasing its user base.

Statsig Product Updates
https://www.statsig.com/updates

OpenAI also uses Statsig, and by incorporating Statsig in-house, they aim to accelerate experimentation in product development and provide a better experience for users.

Prior to founding Statsig, Raji spent 10 years at Meta, where he led engineering for large-scale consumer products. Fidji Simo, CEO of Applications at OpenAI, praised Raji's track record and said he expects his leadership to help translate model advances into safe applications that improve people's lives.

Raji said that when OpenAI proposed the acquisition, it was a no-brainer and he readily accepted.

'I bring my experience scaling consumer and enterprise products to a mission I believe in deeply: advancing AI in a way that solves hard problems, is reliable, and truly benefits people around the world,' said Raji. 'My journey at Statsig has been incredibly rewarding, leading me to this moment and giving me the confidence that we will continue to help teams ship better software every day.'

. @Statsig is joining @OpenAI .

Over the past 4.5 years, we've built something special at Statsig: a platform that the world's best technology companies rely on to build fast and make smart decisions. We're going to join forces with OpenAI to vastly expand our mission, while… https://t.co/cfy0eDjHRi

— Vijaye Raji (@vijayeraji) September 2, 2025

The acquisition price was not disclosed, but according to CNBC , it was an all-stock transaction worth $1.1 billion. Statsig said its services will continue to be available and that investment in its core products will remain unchanged.