Alpen Labs, a startup scaling bitcoin with zero-knowledge technology and rollups, went out of stealth Wednesday and announced $10.6 million in prior funding.

The venture firm Ribbit Capital led a seed funding round for Alpen in 2023, which the firm used to grow its team of cryptographers and engineers, according to an official company release shared with The Block. Alpen Labs's other backers include Castle Island Ventures, Geometry Research, Stillmark, Village Global, Robot Ventures, Axiom Capital, WillowTree Investments, John Pfeffer, Charlie Songhurst, Charles Cascarilla, Ben Davenport, Ashwin Ramachandran, Waitkit Lau and others.

Alpen Labs aims to help fix certain problems related to the Bitcoin network, such as privacy, programmability and scalability, using zero-knowledge proofs …