Succinct Labs, a start-up backed by Paradigm, announced on Wednesday that it had been working with OP Labs, a major contributor to the Optimism protocol, to "solve" the ZK Rollups problem. "Over the past few months, we've worked closely with the OP Labs team to build OP Succinct, a seamless way to upgrade any OP Stack chain to use zero-knowledge proofs within an hour." Succinct Labs, which raised $55 million in seed and Series A funding led by Paradigm in March, says its new approach is much faster than "standard optimistic rollups", which have a "seven-day window for proof of fraud" and cost an average of just "a fraction of a cent" per transaction.