Cari Network: Five US Banks Are Building a Tokenized Deposit System on ZKsync to Challenge the $300B Stablecoin Market
Five mid-size US banks — Huntington Bancshares, First Horizon, M&T Bank, KeyCorp, and Old National Bancorp — are quietly assembling what could become the banking industry's most coordinated response to the stablecoin threat. Their weapon: a blockchain-based tokenized deposit network called Cari Network, built on ZKsync's new enterprise-grade infrastructure, Prividium. If it works, your bank deposits will move as fast as USDC — but with FDIC insurance, interest payments, and zero exposure to crypto-native counterparty risk.
Why Banks Are Finally Fighting Back
For most of the past decade, the banking industry watched stablecoins eat into its territory with a mixture of bewilderment and bureaucratic paralysis. Tether's USDT and Circle's USDC now collectively represent over $300 billion in circulating supply — deposits that might otherwise sit in traditional bank accounts, earning interest for the banks and protection for the depositors.
The tipping point arrived in early 2026. On March 11, FDIC Chairman Travis Hill announced a proposed rule that would formally exclude payment stablecoins from all federal deposit insurance. The message was unmistakable: stablecoins are not deposits, and holders should not expect the government safety net.
That ruling created a clean dividing line — and a competitive opening. Tokenized deposits, which represent the same customer funds currently sitting in bank accounts, remain fully eligible for FDIC coverage up to $250,000. They can pay interest. And they carry the full weight of banking regulation, which for institutional clients translates to trust.
The Cari Network is designed to exploit that gap.
What Cari Network Actually Is
Led by Eugene Ludwig, former US Comptroller of the Currency under President Clinton, Cari Network is a blockchain-based platform that lets participating banks convert customer deposits into digital tokens that can move instantly between institutions. The critical distinction: these tokens never leave the banking system. Each one remains a liability of the issuing bank, subject to the same regulatory framework as any other deposit.
The five founding design partners bring combined assets of roughly $779 billion:
- Huntington Bancshares — $225 billion in assets
- M&T Bank — $214 billion
- KeyCorp — $184 billion
- First Horizon — $84 billion
- Old National Bancorp — $72 billion
These are not the megabanks. JPMorgan already has JPM Coin live on Coinbase's Base network. Citi runs its own Token Services platform. The Cari consortium represents the next tier — regional institutions that collectively serve tens of millions of customers but lack the resources to build proprietary blockchain infrastructure individually.
Their strategy is cooperative rather than competitive: share the infrastructure costs, maintain individual bank sovereignty over deposits, and create a network effect that none could achieve alone.
Why ZKsync's Prividium?
The technology choice is telling. Rather than building on a public blockchain or an off-the-shelf enterprise ledger, Cari selected Prividium — a private, permissioned blockchain framework developed by Matter Labs, the team behind ZKsync.
Prividium represents Matter Labs' strategic pivot from purely public Layer-2 scaling to enterprise infrastructure. The architecture addresses the three concerns that have historically kept banks off blockchain:
Privacy. Prividium runs transaction data and state offchain in an operator-controlled database. Only validity proofs are posted to Ethereum, meaning no competitor or public observer can see individual transactions, balances, or counterparty relationships.
Permissioning. Every read and write passes through a Proxy RPC that enforces contract-level and argument-level access controls. Banks control who participates. The system integrates with enterprise identity providers like Okta and Azure Active Directory, alongside crypto-native wallet authentication.
Regulatory Auditability. Despite being private, the system anchors correctness to Ethereum through zero-knowledge proofs. Regulators can verify that the ledger is mathematically consistent without accessing individual transaction details — a critical feature for satisfying bank examiners who need assurance without full data exposure.
This combination — private execution with public verifiability — is what separates Prividium from earlier enterprise blockchain attempts like Hyperledger or R3's Corda, which lacked the cryptographic guarantees that zero-knowledge proofs provide.
Tokenized Deposits vs. Stablecoins: The Real Differences
The surface-level comparison is simple: both tokenized deposits and stablecoins represent dollar-denominated value on a blockchain. But the legal, economic, and regulatory differences are substantial.
| Feature | Tokenized Deposits | Payment Stablecoins |
|---|---|---|
| FDIC Insurance | Yes, up to $250K | No — explicitly excluded |
| Interest Payments | Yes, standard deposit rates | Prohibited under GENIUS Act |
| Issuer | FDIC-insured banks only | Banks, OCC-chartered trusts, state-licensed nonbanks |
| Reserve Structure | Fractional (standard banking) | 100% reserve required |
| Regulatory Framework | Existing banking law | GENIUS Act (new framework) |
| Counterparty Risk | Bank credit risk + FDIC backstop | Issuer credit risk only |
The GENIUS Act, signed into law in July 2025, created the first comprehensive US regulatory framework for stablecoins. It requires 100% reserve backing, prohibits yield payments, and explicitly bars stablecoins from deposit insurance. The Act also preserves existing banking authority — meaning tokenized deposits are not stablecoins under the law and continue to operate under traditional bank regulation.
This creates an asymmetry that Cari aims to exploit. A tokenized deposit on the Cari Network offers the speed and programmability of a stablecoin, but with the legal protections and economic benefits (interest) of a traditional bank account.
How JPMorgan and Citi Compare
Cari is not the first bank-led tokenized deposit initiative. JPMorgan launched JPM Coin in November 2025 on Coinbase's Base network, making it available to institutional clients for 24/7 dollar-denominated transfers. The token is interest-bearing, representing actual deposits held at JPMorgan. Citigroup runs a parallel program through Citi Token Services.
But both JPM Coin and Citi Token are single-institution products. They work within each bank's ecosystem — JPMorgan clients sending to other JPMorgan clients, Citi clients within Citi's network.
Cari's value proposition is different: interbank settlement. A Huntington customer could send tokenized deposits to a KeyCorp customer instantly, with the transaction settling in seconds rather than the hours or days required by existing interbank rails like Fedwire or ACH. The network effect grows with each participating bank, creating a shared utility that no single regional institution could justify building alone.
The comparison reveals a two-tier pattern emerging in US banking:
- Tier 1 (Megabanks): Proprietary tokenized deposit systems on public blockchains (JPMorgan on Base, Citi Token Services)
- Tier 2 (Regional banks): Cooperative tokenized deposit networks on permissioned infrastructure (Cari on Prividium)
Both tiers are building toward the same endpoint — deposits that move at internet speed — but through fundamentally different organizational models.
The Timeline and What Could Go Wrong
Cari is targeting an aggressive rollout schedule:
- March 2026: Minimum viable product release
- Q3 2026: Pilot testing with participating banks
- Q4 2026: Full commercial launch
Several risks could derail or delay this timeline:
Regulatory uncertainty. While the FDIC has signaled support for tokenized deposits, specific implementation rules have not been finalized. The comment period for the FDIC's proposed stablecoin exclusion rule runs through May 18, 2026. If the final rule introduces unexpected requirements for tokenized deposits, Cari may need to redesign compliance workflows.
Interoperability challenges. Five banks with different core banking systems, compliance frameworks, and customer bases must agree on common standards for token issuance, transfer, and redemption. Enterprise blockchain projects have historically struggled at the integration layer, not the technology layer.
Adoption chicken-and-egg. The network's value depends on widespread participation. If only two of the five banks go live initially, the utility is limited. Expanding beyond the founding five requires convincing additional banks to trust infrastructure they did not help design.
Competition from stablecoins. Circle, Tether, and PayPal (via PYUSD) are not standing still. Circle received an OCC national trust bank charter in December 2025, blurring the line between stablecoin issuers and banks. If stablecoin issuers gain bank-like capabilities, the regulatory advantage of tokenized deposits narrows.
What This Means for the Broader Market
The Cari Network represents something larger than a single technology project. It signals that the US banking system's response to stablecoins is moving from defensive rhetoric to offensive infrastructure.
The $300 billion stablecoin market grew by capturing use cases that banks were too slow to serve: 24/7 settlement, cross-border transfers, programmable payments, and DeFi collateral. Tokenized deposits cannot replace all of these functions — they will not work as DeFi collateral or for pseudonymous transactions. But for the core banking use case of moving money between known, regulated counterparties, they offer a compelling alternative.
The GENIUS Act inadvertently accelerated this competition. By drawing a bright line between stablecoins (no insurance, no yield, 100% reserves) and deposits (insured, yield-bearing, fractional reserves), the legislation created a clear competitive arena. Banks and stablecoin issuers are now building parallel systems that serve similar functions under different regulatory regimes.
The question is whether customers — particularly institutional clients managing large treasury positions — will prefer the speed and flexibility of stablecoins or the safety and familiarity of tokenized bank deposits. The answer is likely both, depending on the use case. But Cari's bet is that for the vast majority of commercial banking transactions, the deposit wrapper wins.
Looking Ahead
If Cari Network delivers on its Q4 2026 commercial launch, it will be the first multi-bank tokenized deposit network operating on zero-knowledge proof infrastructure in the United States. That combination — cooperative banking, ZK privacy, and regulatory clarity — has not existed before.
The next twelve months will determine whether tokenized deposits become a genuine competitive response to stablecoins or remain a pilot-stage curiosity. With $779 billion in combined assets backing the initiative and a former Comptroller of the Currency at the helm, Cari has both the credibility and the capitalization to make the attempt credible.
For the stablecoin industry, the message is clear: banks are no longer content to watch from the sidelines. The deposits are fighting back — and this time, they are running on blockchain.
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