Startale Selects Privacy Boost as the Official Privacy Partner of Startale App
Startale Group today announced a partnership with Sunnyside Labs, selecting Privacy Boost as Startale App’s official privacy partner. Privacy Boost will deploy natively on Soneium and integrate directly into the Startale App, bringing self-custodial, onchain privacy to everyday users for the first time within a consumer crypto application. This partnership also marks a milestone in Startale App's goal to build the infrastructure backbone of Soneium.
This is Privacy Boost's first consumer-facing application integration and marks a significant step in Startale's commitment to building infrastructure that empowers mainstream users with practical, everyday onchain financial activities.
Privacy, Built in for Soneium by Sony Block Solutions Labs
The Startale App is designed to make the onchain economy accessible to mainstream users: from asset management and payments to Mini Apps and ecosystem rewards. It is the flagship consumer entry point to Soneium by Sony Block Solutions Labs, developed in collaboration with Startale Group. As the app grows, so does its responsibility to protect users' financial activity.
On a public blockchain, every transaction is visible by default. Balances, transfer amounts, and counterparties are all observable onchain. For a consumer financial application targeting mainstream adoption, this visibility could be seen as a gap in user privacy. Privacy Boost closes it.
Built on a hybrid ZK and TEE architecture, Privacy Boost delivers sub-500ms proof generation and 1,800+ TPS throughput, a performance designed for the demands of a consumer product. Private transactions feel instant. Users remain in full self-custody throughout. And the system supports selective auditability, meaning it is built to meet regulatory requirements without compromising user control.
How Privacy Boost Enhances the Startale App
The partnership brings privacy to the Startale App on two fronts:
Soneium Network Deployment: Privacy Boost's full protocol stack, smart contracts, and TEE infrastructure will be deployed natively on Soneium. Any developer building on Soneium gains access to onchain private transfers as a native network capability from day one.
Startale App Integration: The Startale App will integrate Privacy Boost's SDK to offer privacy features directly to users:
- Shield — Users deposit assets into the privacy pool, converting them into private onchain notes that conceal balances from public view.
- Private Transfer — Users transfer assets within the pool without revealing amounts, balances, or counterparties.
- Private Card Spending — Privacy-preserving flows designed to work with Startale's upcoming crypto card, so users can spend without exposing their full onchain activity.
As the Startale App expands into new payment flows, Mini Apps, and ecosystem integrations, the Privacy Boost integration is designed to scale with it.
Building the Complete Consumer Crypto Experience
For Startale, this partnership reflects a broader philosophy: every layer of the App, from payments and referrals to settlements, should be privacy-conscious.
“Not every transaction needs to be private, but every user should have the choice. With Privacy Boost integrated into the Startale App, privacy becomes something users can enable when it matters. It puts control in their hands to decide when and how they protect their onchain activity. That is what a true SuperApp should deliver.”
— Sota Watanabe, CEO, Startale Group
“Startale is serious about bringing privacy to consumer crypto — from everyday payments and card spending to mini apps. These are exactly the use cases Privacy Boost was built for: high-performance privacy at consumer scale, with an SDK designed for native application and mini app integration alike. We’re thrilled to support the Startale App as it sets a new standard for what a crypto SuperApp can offer its users.”
— Taem Park, Co-Founder & CEO, Sunnyside Labs
About Sunnyside Labs Sunnyside Labs is a core contributor to the OP Stack and Ethereum, building privacy-first infrastructure for public blockchains. Privacy Boost is their flagship product — enterprise-grade, self-custodial onchain privacy combining ZK proofs and TEEs for high-performance, compliant private transactions. privacyboost.io