Aztec Labs relaunched zk.money on September 29, 2026, restoring a self-custodial wallet that lets users send private stablecoin payments on Aztec Network, the company's privacy-focused Ethereum layer-2 that settles back to mainnet. The original zk.money, launched in 2021, attracted more than 75,000 wallets and processed over $100 million in volume before Aztec discontinued it in 2023 to concentrate engineering resources on building its own network.

The early rollout supports USDC, USDT and DAI, with individual transactions capped at $2,500 and a shared $50,000 daily deposit ceiling across all users. Those limits signal a deliberately constrained first phase as the company tests demand and operational risk.

How the wallet's privacy model works

Users claim human-readable tags such as bob.zk.money, which resolve through the Ethereum Name Service to a deposit address. Payments between two users inside the wallet do not broadcast balances, amounts or recipients to the public ledger. Deposits arriving from Ethereum, however, remain visible on-chain — a boundary Aztec itself acknowledges.

The architecture splits execution between private and public domains. Private functions run on the user's own device, generating zero-knowledge proofs — cryptographic receipts that confirm a transaction is valid without revealing its details. Because the wallet is self-custodial, Aztec says it cannot spend or freeze user funds, and no privileged administrator can control balances.

That distinction matters for institutional and retail users weighing adoption: zk.money conceals activity between counterparties inside the wallet, not the movement of funds into it. Any compliance or chain-analysis assessment of the product has to account for public entry points.

Why Aztec shelved the original

CEO Joe Andrews said the 2023 shutdown was not a demand problem. The earlier system was difficult to scale and could not reach global adoption, he said, as reported by PANews citing The Block. The team redirected engineers toward building Aztec Network, and the new zk.money runs on that decentralized infrastructure rather than the original rails.

Andrews also framed the relaunch as a correction to Ethereum's default transparency. "Onchain transactions between two individuals shouldn't mean publishing your financial history to the world," he said in a statement carried by Decrypt.

The original product launched in 2021, the same year Aztec raised $17 million in a Paradigm-led round. Aztec later expanded the technology through Aztec Connect, a toolkit for integrating its privacy stack with DeFi protocols.

Does the relaunch track a broader privacy shift?

Privacy has moved up Ethereum's roadmap in recent months. Developers are weighing proposals for next year's Hegotá upgrade that would let privacy pools pay their own transaction fees without intermediaries. Co-founder Vitalik Buterin wrote over the weekend that special-purpose applications could achieve "very strong privacy" through zero-knowledge proofs as part of his "cryptographic world computer" vision.

For stablecoin users, the practical effect is a channel to move USDC, USDT or DAI without publishing amounts or counterparties. The trade-offs are equally concrete: deposits stay visible, and the caps make the wallet unsuitable for large transfers during this phase.

Regulatory context looms over any privacy product returning to market after the enforcement wave that took down Tornado Cash's developers. Aztec's design choices — self-custody, no admin keys, capped early volume — read as an attempt to position the wallet as user-controlled infrastructure rather than a custodial mixing service.

What to watch

The near-term markers are twofold: whether Aztec lifts the $2,500 per-transaction and $50,000 daily deposit limits as usage grows, and how the Hegotá privacy-pool fee proposals advance next year. Both will determine how much of Ethereum's stablecoin activity can realistically migrate to private rails.