For years, Bitcoin’s security has been unmatched, but scalability has been its Achilles’ heel. Syscoin is building where others hesitated, pushing modularity before it was mainstream, and proving that Bitcoin’s security could scale without compromise. Today, that vision takes its biggest leap forward.

zkSYS, the first-ever Edgechain under Syscoin’s modular expansion, is now live on testnet.  Powered by zkSync zkStack and engineered by Zeeve RaaS, zkSYS is not just another scalability solution—it’s a fundamental shift in how smart contracts, rollups, and Bitcoin can co-exist.

This is not just a zk-rollup. This is not an Ethereum clone. This is Syscoin adding modular scalability—without breaking what makes Bitcoin the most secure blockchain in the world.

“We’re not trying to change what makes Bitcoin great—we’re preserving its strengths and using them as the foundation for something far greater, zkSYS is the first real-world expression of our Edgechain standard and our broader vision for Bitcoin+. It means building the most powerful Web3 ecosystem imaginable—without compromising decentralization, security, or sovereignty. It’s Bitcoin and more. That’s why we call it Bitcoin+.”

Jagdeep Sidhu,
Lead Core Developer of Syscoin.

Developers can now build the next generation of DeFi, AI economies, and scalable dApps—on a Bitcoin-powered execution layer, with low fees, high throughput, and the modularity missing earlier.  

Edgechains: Syscoin’s Blueprint for a Scalable Web3

For years, blockchain scaling meant choosing between security and performance. Syscoin’s Edgechains change that equation. These edge chains are not just Layer 2s—they are fully modular execution layers that extend Bitcoin’s utility while keeping its economic and security foundations intact.

zkSYS is the first working implementation of this vision, a zkSync-powered Validium execution layer designed specifically for high-speed smart contracts and modular scalability. It joins Syscoin’s growing modular roadmap alongside Rollux, its most popular Layer 2 rollup, and the upcoming Edgechain framework, a permissionless system for sovereign modular chains.

Unlike traditional-sense rollups, zkSYS does not rely on Ethereum for settlement. Instead, it anchors directly to Syscoin’s Bitcoin-backed L1, offering lower costs, faster finality, and no reliance on Ethereum’s congestion or gas fees. With Syscoin’s roadmap pushing towards a network of interconnected Edgechains, zkSYS is the first step towards a scalable, secure Web3 ecosystem built on Bitcoin.

Why zkSync zkStack? A Modular Execution Layer for Syscoin

Ethereum rollups have dominated scalability discussions always, but zkSYS needed something different—a zkStack-powered execution layer that could fully integrate into Syscoin’s modular vision. Instead of retrofitting Ethereum rollup logic, zkSYS is custom-engineered to settle on Syscoin’s L1, bypass Ethereum constraints, and introduce Syscoin-native data availability.

And Zeeve worked extensively to modify zkSync’s core stack, ensuring it fully aligns with Syscoin’s architecture.

That means:

• Bitcoin-Secured Finality—Syscoin L1 acts as the trustless settlement layer. Slashed transaction costs and removed Ethereum dependencies.
• Custom zkSync Integration—Zeeve rebuilt key elements of zkSync’s execution logic, bypassing Ethereum-native constraints like EIP-4844.
• Tailored Data Availability (DA)—A bespoke Syscoin-native DA layer gives high throughput without the fragmentation of standard rollups.

With zkSync’s cryptographic efficiency and Syscoin’s modular architecture, zkSYS brings Ethereum-level scalability with Bitcoin-backed security.

Zeeve RaaS: The Infrastructure Powering zkSYS

Building zkSYS wasn’t just about deploying zkSync zkStack—it required deep modifications, core-level engineering, and a robust infrastructure backbone.

That’s where Zeeve, the industry’s leading Rollups-as-a-Service (RaaS) provider, played a pivotal role.

🔹 Protocol-Level Engineering → Zeeve configured core zkSync contract logic, hashing mechanisms, and execution models to align zkSync with Syscoin’s modular vision.
🔹 Custom Validium Architecture → Modifying zkSync to bypass Ethereum-specific elements and optimize Syscoin-native execution.
🔹 Full-Scale Deployment & Optimization → Zeeve led the testnet rollout, ensuring scalability, stability, and future mainnet readiness.

Zeeve also maintains Syscoin’s Rollux Explorer, giving developers full network visibility, transaction tracking, and ecosystem monitoring tools.

zkSYS mainnet launch is also coming soon. This testnet is the first step toward a fully modular, Bitcoin-secured Web3 ecosystem.

Developers can now deploy and test dApps on zkSYS, experiment with its high-speed execution, and leverage Syscoin’s secure, low-cost settlement layer. 

zkSYS is where Bitcoin’s finality meets zkSync’s scalability. The foundation is set. Now, it’s time to deploy what comes next.