Institutions are Racing to Solve Stablecoins’ $315 Billion Privacy Problem

The Vault has partnered with Hinkal to bring private stablecoin transactions into its institutional custody platform, as public blockchain transparency becomes a growing problem for companies moving money on-chain.

The integration, announced on June 18, will let The Vault clients deposit, send, and withdraw stablecoins through Hinkal’s privacy layer. The Vault is an institutional digital asset infrastructure for companies that need to hold, move, manage, and secure crypto assets professionally, rather than using standard retail wallets or exchanges.

The Stablecoin Boom Has a Privacy Problem

Stablecoins have grown into a market of more than $315 billion, according to DeFiLlama data. McKinsey estimates real stablecoin payments are already running at about $390 billion a year, with B2B payments making up roughly $226 billion of that activity.

That growth has created a simple problem. Public blockchains expose transaction amounts, wallet balances, and counterparties by default. For institutions that can reveal treasury movements, supplier relationships, trading flows, and internal payment patterns.

The Ledger Sees Too Much

Banks and payment firms are already treating privacy as a serious blocker. Visa said earlier this year that public blockchain transparency can conflict with financial institutions’ privacy expectations, and that the lack of privacy can become a dealbreaker for meaningful on-chain activity.

The Vault sits on the custody side of that problem. It provides digital-asset storage, treasury controls, approval workflows, and governance tools for institutional users.

Hinkal sits on the privacy side. Its infrastructure uses zero-knowledge technology, which allows a blockchain transaction to be verified without exposing all of its details to the public. 

In simple terms, the network can confirm that a payment is valid without showing everyone the full payment trail.

Privacy Without a Blindfold

The important part is compliance. Institutional privacy cannot look like pure anonymity. Hinkal says its system supports features such as viewing keys and compliance checks, which can give approved parties visibility without making transaction data public to everyone.

The partnership is a bet on the next phase of stablecoin adoption. Stablecoins are already large enough to matter, but their public nature remains awkward for serious financial use.

If stablecoins are to move deeper into corporate treasury, settlement, and payments, institutions will need more than speed and low fees. They will need privacy that still leaves room for controls, audits, and regulation.

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