Optimism taps Privacy Boost to bring regulatory-ready privacy to OP Mainnet

Privacy Boost, which provides enterprise-grade confidential transfers on EVM chains, is now live on OP Mainnet as a certified privacy offering for the Optimism ecosystem, with priority support for OP Enterprise customers, according to a Tuesday announcement.

Built by Sunnyside Labs for real-world financial applications, Privacy Boost enables applications to integrate private transfers and privacy-preserving DeFi workflows into public blockchains, keeping sensitive data hidden from the public, visible only to the sponsoring app, and fully auditable by regulators.

Privacy Boost uses a hybrid architecture where zero-knowledge proofs handle on-chain correctness, proving a transaction is valid without revealing what it contains, while trusted execution environments handle the heavy computational lifting. The result is private transaction generation in under 500 milliseconds.

Through proof aggregation, Privacy Boost can handle over 1,800 transactions per second, reducing gas costs and increasing throughput. Users retain true self-custody, with the ability to withdraw funds directly through the smart contract even if servers go offline.

The product passed a security audit by OpenZeppelin before going live. It supports configurable policy controls like KYC-gated environments and auditable transaction views, features designed to satisfy compliance teams at regulated institutions without gutting the privacy protections for end users.

The launch addresses a critical gap in enterprise-grade blockchain infrastructure, where transparency of public chains creates operational, legal, and competitive risks, the team says.

“As we work with banks, fintechs, and institutional partners looking to move on-chain, privacy consistently comes up as a non-negotiable requirement,” said OP Labs’ co-founder Jing Wang in a statement. “Privacy Boost checked every box — performance, regulatory readiness, seamless integration, and self-custody. That’s why we chose them as a certified privacy offering.”

Now live on the OP Mainnet following an OpenZeppelin security audit, Privacy Boost is already being integrated across wallets, payment applications and institutional platforms, with private DeFi features including swaps, lending and yield strategies expected to follow in May.