the US anonymous phone service provider Phreeli has launched in the United States, using zero-knowledge proof (ZK) for "paid" verification of bill payments, allowing the platform to operate without knowing the identity or payment method. Zcash co-founder Zooko Wilcox serves as an advisor, recommending the use of zero-knowledge access passes. The network infrastructure is provided by T-Mobile, and approximately $5 million in funding was raised over the past year.