Introducing Rayls Sovereign: the onchain gateway for institutions

Rayls Sovereign is a private, institutional-grade blockchain that gives each financial institution its own sovereign ledger, integrated with existing banking and treasury systems and connected to external public and private blockchain networks. An institution installs it inside its own perimeter, on its own cloud or on-premises, and uses it to tokenise money and assets, settle with counterparties, and reach public networks on its own terms. It is the evolution of the product we previously called the Rayls Privacy Node, re-architected so thoroughly that it deserved a new name, and carrying two years of production experience with it.

I want to explain why we built it, what it does in business terms, and why we think it changes the adoption question for banks and financial institutions.

What our clients told us

Sovereign was shaped by feedback from the institutions we have worked with since 2024, which formed clear patterns and direction for what was still missing from institutional blockchains.

The first thing we heard is why blockchain projects rarely make it into production. Innovation teams build promising tokenisation prototypes, and then the project meets the rest of the bank: security review, data storage and protection, security controls, procurement standards, integration with core systems, risk and compliance. Public blockchains assume everything onchain is readable, with an exposed attack surface. Permissioned blockchains either assume sharing sensitive transaction data with a consortium of competitors, or a peer to peer architecture that reverts back to trusting intermediaries and gives no single source of truth for regulators. The net result is that the prototype never graduates to become part of the institution's operating model.

The second thing we heard is that the efficiency pitch misses the point. Making an existing internal process marginally faster or cheaper does not justify the change-management cost of replacing core infrastructure. What institutions actually want is capabilities they do not have today: a programmable platform with the ability to issue tokenised deposits, hold and move stablecoins, distribute tokenised assets, and settle atomically with counterparties, all without surrendering control of their data or their customer relationships.

The third thing we heard is that shared infrastructure is a hard sell. A ledger shared with competitors fails data-residency, confidentiality, and operational-independence tests long before a deal is ever signed. Banks do not want to share a database with each other, and they should not have to. Each institution wants to configure their own systems precisely to meet their internal policies, risk and compliance benchmarks and tailored integrations with the rest of their core financial systems.

And the fourth thing was that there's always a catch with existing blockchain platform providers. The available options have unpalatable tradeoffs, such as implicit vendor lock in, incompatibility with EVM standards, implicit licensing fees that turn out to be very expensive, probabilistic finality that doesn't give settlement certainty, creating risk and locking capital, and transaction fees that must be paid in a volatile and regulatory uncertain cryptocurrency.

Combined, there hasn't been a viable option for institutions to move into production with confidence that all their needs are met. Until now.

What Rayls Sovereign provides

Sovereign has been built to solve all four requirements. Each institution runs its own ledger, inside its own environment, as the sole operator. Nothing is pooled, and nothing leaves the building except the encrypted minimum required to transact with others and provide certainty (e.g. using ZK proofs). From that sovereign position, the institution connects outward: to other institutions within their local jurisdiction through Rayls Private Networks, and to public liquidity through the Rayls Public Chain.

In business terms, that means:

• New products, not marginal savings: tokenised deposits, stablecoin settlement, and onchain asset yield distribution are new revenue lines that existing infrastructure cannot support.
• Enterprise-grade by design: the system meets the requirements an institution applies to any software it runs, from key management in the institution's own KMS or HSM through to role-based access control, high availability, monitoring and reporting. Sovereign is effectively a banking system with an EVM ledger running on top.
• Integration rather than migration: Sovereign sits alongside core banking systems and connects to them through standard integration patterns, including SSO for staff, a clean API library and modular custody integration, so adoption does not require replacing what already works nor hiring a whole team of blockchain engineers.
• Controlled connectivity: the institution chooses which networks they want to connect to and which assets travel where, with compliance and regulator access built into the core protocol layer rather than bolted on.
• Open source, EVM codebase: removing the concerns of vendor lock in or solvency risk, whilst natively embracing EVM standards for asset composability, programmable workflows and sourcing developer talent across the EVM network ecosystem.

The use cases it enables

The capabilities of Rayls directly serve two use case categories, and now with Sovereign these workflows connect between traditional financial systems and blockchain networks:

Tokenised Money covers stablecoins, tokenised deposits, and tokenised reserves. In practice, that means:

• Treasury and liquidity management on a real-time ledger
• Programmable payments and FX
• Atomic settlement for asset exchange and currency legs (DvP and PvP), and, as it matures,
• Compliant agentic commerce, where payments execute programmatically under rules the institution defines.

Tokenised Assets covers tokenised financial assets, tokenised collateral, and real-world assets. That translates into:

• Collateral that can actually move between venues and counterparties
• Yield distribution through onchain vaults to suitable investors
• Lending and credit against tokenised assets, and
• Trading in assets that have historically been too illiquid to trade at all.

The two reinforce each other, because tokenised assets need tokenised money to settle against, and both run across the same infrastructure.

Already in production

Sovereign is already live, generally available and the underlying platform (previously called the Privacy Node) has been in production since June 2024, installed and used by more than 30 financial institutions.

• Núclea, Brazil's largest payments FMI processing $3.5T in payments per year (like the Brazilian DTCC), has run corporate receivables tokenisation on Rayls in production, at a rate of around 40,000 tokenised assets per month.
• XP, one of LATAM's leading broker platforms with $400Bn AUM, issues USDXP, a fully USD-backed stablecoin, in production on Rayls Sovereign.
• The Central Bank of Brazil selected Rayls for the Drex pilot, in which 16 of Brazil's largest banks, with Santander and the Brazilian stock exchange among them, installed their own Sovereign instance and settled government bonds and other assets against central bank digital currency.
• Kinexys by J.P. Morgan tested Rayls Sovereign in Project EPIC as a privacy and identity layer for institutional tokenisation
• The Bank of England and BIS Innovation Hub DLT Innovation Challenge on wholesale settlement.
• Alongside the banks and central banks, issuers are committing real volume: AmFi is bringing $1 billion of private credit to the network, and Nimofast has committed up to $100 billion of energy and commodities assets, issuing into Rayls Sovereign with planned multi-chain distribution.

This mix of central banks, commercial banks, FMIs, and asset issuers, demonstrates the institutional demand and readiness for Rayls Sovereign.

What's next

Rayls Sovereign is live now. It ships connected to both the Rayls Public Chain and Rayls Private Networks, so an institution that installs it today can issue privately, settle across a governed network, and distribute to public liquidity through one piece of infrastructure. The global roll-out is underway, building outward from the production base in Brazil into the US, UK, and Europe.

Try Rayls Sovereign for yourself here: https://www.rayls.com/products/sovereign

If you are responsible for digital assets, treasury, or markets infrastructure at an institution and you want to see what Sovereign would look like inside your environment, reach out to the team and book a demo.