A proof market is a marketplace in which parties that need cryptographic proofs, most often zero-knowledge proofs, post requests and independent operators called provers compete to produce them for a fee. Generating such proofs can require heavy computing power and specialised hardware, while checking them is cheap. Rather than every rollup, bridge or application running its own proving systems, a proof market lets them outsource the work, paying for speed and price much as cloud computing is bought. Buyers include ZK-rollups that must prove batches of transactions, cross-chain systems that prove events on other chains, and services that prove off-chain computations. Several projects have built networks of this kind since the early 2020s, often with staking and penalties to make sure provers deliver on time. Open questions include whether a few large operators will dominate and how pricing will develop. Also see zk-SNARK and FPGA hardware.
Last updated 13 Nov 2026