https://www.cnet.com/news/jeff-bezos-says-amazon-prime-now-has-over-100-million-members/

Amazon founder and CEO Jeff Bezos revealed Wednesday that its Prime membership service has over 100 million paid customers worldwide.

The company hasn't previously offered a specific number about its Prime members, instead keeping the size of one of its most important businesses a secret until now. Amazon has previously said it has tens of millions of Prime members in the US and tens of millions internationally.