OP Labs launches Privacy SDK

OP Labs has launched Privacy Boost, a software kit for building private transactions on Ethereum-compatible blockchains while keeping compliance controls in place. (privacyboost.io) Public blockchains usually show balances, counterparties, and transaction history to anyone with a block explorer. Privacy Boost says it can hide that data while letting developers add private transfers and decentralized finance features with a drop-in software development kit. (privacyboost.io) The product is live first on OP Mainnet, the Ethereum layer-2 network developed by OP Labs, and OP Labs said on April 21 that expansion to additional blockchains is planned in the coming weeks. Decrypt reported the launch on April 21, 2026. (decrypt.co) OP Mainnet is a layer-2 network, which means it processes transactions more cheaply and quickly than Ethereum mainnet while settling back to Ethereum for security. Optimism’s documentation lists OP Mainnet as chain ID 10 and describes it as production-ready infrastructure secured by Ethereum. (docs.optimism.io 1) (docs.optimism.io 2) Privacy Boost says it combines zero-knowledge proofs, a way to prove something without revealing the underlying data, with trusted execution environments, which are locked-down hardware enclaves for sensitive computing. The company says that design is meant to deliver high throughput, sub-500 millisecond proofs, and self-custody instead of handing assets to an intermediary. (privacyboost.io) The compliance pitch is central to the product. Privacy Boost says companies can issue audit view keys for selective disclosure and set risk controls for sanctions screening, audits, and jurisdiction-specific rules, while Decrypt reported that OP Labs is positioning the tool around Know Your Customer requirements for enterprise users. (privacyboost.io) (decrypt.co) OP Labs is aiming at a long-running problem for banks, payments firms, and large traders that want public-blockchain settlement without exposing counterparties, trade sizes, or treasury movements in real time. Karl Floersch, OP Labs’ co-founder and chief technology officer, told Decrypt that full transparency had been “unworkable” for many traditional firms. (decrypt.co) The launch also fits Optimism’s broader enterprise push. In an October 30, 2025 post, Optimism described OP Mainnet as an “enterprise launch pad” and said companies could start on the shared network before moving to their own OP Stack chain later. (optimism.io) Competitors are chasing the same customers with different designs. Edgen noted that OP Labs is entering a market where networks such as Canton and Starknet have also promoted privacy features for institutional or enterprise blockchain use. (edgen.tech) The test for Privacy Boost is whether companies use it for real payment, treasury, and tokenized-asset workflows instead of pilot projects. OP Labs is betting that private execution with audit hooks will make public-chain infrastructure usable for firms that have so far stayed on the sidelines. (decrypt.co)