The Privacy Layer Is Finally Coming to Ethereum, And Why It Will Define the Next Cycle

The last crypto cycle was all about modularity. Data availability layers like Celestia and EigenLayer redefined scale and programmability to create the groundwork for broader adoption of blockchain technology, even in institutional sectors.

Sure enough, institutions followed. In this cycle, we saw stablecoins settle more value than Visa, BlackRock dipped into the world of tokenized funds, and Digital Asset Treasuries (DATs) brought an inflow of institutional capital that was previously corralled out of crypto for infrastructure reasons.

Now we’re starting to see the developments that will define the next cycle. Underneath this wave of adoption, a new layer has begun to form that isn’t about throughput or capital efficiency, but about what should stay private.

The next leap in the crypto stack is confidentiality. This is going to define the next cycle.

Privacy in the Context of Crypto History
In his “Three Eras of Crypto” thesis, Balaji Srinivasan breaks crypto history down into phases:

• 2009–2017: Proof of Work.
• 2017–2025: Programmability.
• 2025 and beyond: Privacy.

The logic behind it is that now that we’ve solved the core layer and the programmability layer, we urgently need a privacy layer. We’re now crossing that final threshold where we have to focus on answering a critical missing question: what happens when everyone can see everything?

We Built It. They Came. But Now They Want Privacy

This matters for way more than technical reasons. If we want institutions to stay and retail to transact freely, privacy has to be a precondition.

The last two years saw an unprecedented wave of both retail and institutional activity. But adoption isn’t the same as retention. Without privacy, the industry hits critical walls that hinder any meaningful adoption of crypto technologies beyond some DeFi applications.

Enterprises can’t afford to leak vendor relationships on public blockchains. Payroll data can't live onchain without risking reputational damage or violating labor laws. Compliance officers need verifiable attestations, not raw transaction histories indexed by competitors.

A16z’s State of Crypto 2025 report called it out clearly:

“Privacy is returning to the foreground—and may be a prerequisite for broader adoption.”

They note that ZK and FHE systems are being trialed for KYC, institutional trading, and shielded payments. Confidentiality has gone from cypherpunk wishlist to boardroom requirement.

The Signals Are Already Here

It doesn’t stop at trials, however. Privacy is at the forefront everywhere, from new purpose-built L1s to directional conversations on the future of Ethereum.

• Circle’s Arc Network shipped with a built-in privacy primitive. Senders and amounts can be shielded by default, with opt-in viewing keys for auditors. The largest stablecoin issuer in the world just made privacy a feature, not a bug.
• Aleo, Aztec, and Zama are pushing programmable privacy with zero-knowledge proofs and fully homomorphic encryption (FHE). JPMorgan ran a full private secondary market auction using Zama’s FHE-EVM. Paxos is piloting a private US dollar stablecoin on Aleo.
• Vitalik’s Privacy Roadmap is aimed at enabling selective disclosure and programmable confidentiality.
• Horizen migrated to Base with an L3 focused on confidential, compliant stablecoin infrastructure that brings enclave-based private execution to Ethereum without reinventing the wheel.

The stack is forming because it meets clear needs. Retail needs it to avoid individuals’ financial data being permanently traceable. Businesses demand it to maintain competitive advantages and proprietary knowledge. At the same time, builders are more motivated than ever to unlock it since privacy enables key use cases like private stablecoin payrolls, confidential lending and credit scoring, identity-preserving gaming and voting and private governance structures for DAOs.

Privacy is at the center of crypto’s product-market fit.

What Horizen Is Building

At Horizen, we’ve already spent years exploring the privacy stack. Now we’re building it on Ethereum’s most active L2. As an EVM-compatible L3 on Base that uses confidential compute environments, Horizen enables:

• Private payroll disbursements
• NGO and aid transfers
• SME vendor payments
• Treasury flows and expense batching

These use cases are also based on support for the selective disclosure paradigm put forth by Vitalik, meaning regulators and auditors can verify what they need, and nothing more. These features are key to the next cycle where privacy will be at the center of new real-world use cases following the institutional adoption of this cycle.

Privacy by Default, Disclosure by Design

Crypto nailed programmability and scale, now it needs to nail discretion. The privacy layer being built today will scale will give people confidence that what happens onchain won’t follow them forever.

The tools are here. The infrastructure is ready. The privacy layer is coming.

Learn more: horizen.io