Zcash is swinging for the fences. The privacy-focused blockchain, which currently processes somewhere between 3 and 20 shielded transactions per second, is building toward a future where it can handle 50,000 TPS, putting it in the same conversation as Visa’s payment network. That’s roughly a 2,500x improvement over current capacity.

The ambition is built on a new node architecture and a series of protocol upgrades that collectively aim to make fully private transactions not just possible at scale, but practical.

Project Tachyon and NU7: the engine room

The scaling push centers on two key initiatives: Project Tachyon and the NU7 network upgrade. Project Tachyon, led by cryptographer Sean Bowe, targets thousands of TPS for shielded transactions, with estimates suggesting up to 10,000 TPS as a near-term milestone before pushing toward the 50,000 figure.

The NU7 testnet launched on May 22, 2026, and early results are encouraging. Block times dropped from 75 seconds to just 25 seconds, a threefold reduction. Shielded TPS doubled on the testnet compared to previous benchmarks, contributing to what the project describes as a potential 300% increase in transaction speed.

For context, Zcash’s current shielded throughput of 3 to 20 TPS makes it roughly comparable to Bitcoin’s base layer in terms of raw capacity. The difference is that every shielded Zcash transaction uses zk-SNARKs, a form of zero-knowledge cryptography that proves a transaction is valid without revealing sender, receiver, or amount. That privacy comes with heavy computational overhead, which is precisely what these upgrades are designed to reduce.

The improvements build on years of iterative upgrades, including the Sapling and Orchard shielded pools, which progressively reduced the cost and complexity of private transactions. The new node software, a Rust-based rewrite called Zebra, provides the foundation for these protocol-level scaling changes rather than relying on beefier hardware.

Growing adoption, growing pains

Zcash’s shielded pool now constitutes around 30% of total supply. The Zcash Foundation also raised $25 million in March 2026, giving the project fresh capital to fund development. That fundraise coincided with the shielded pool growth, suggesting aligned momentum between builder activity and user adoption.

Zcash’s trajectory hit a serious speed bump in early June 2026 when a critical network vulnerability was discovered and patched. ZEC’s price dropped approximately 48% in the aftermath.

What this means for investors

The competitive landscape matters here. Monero, Zcash’s primary rival in the privacy coin space, operates on a fundamentally different privacy model with its own scaling constraints. Meanwhile, general-purpose Layer 1s like Solana boast high TPS numbers but offer no native transaction privacy.

The 48% price crash following June’s vulnerability disclosure shows how quickly confidence can erode. Delivering a 300% speed improvement on a testnet is noteworthy. Delivering Visa-scale private transactions on mainnet, without security incidents, is an entirely different challenge.

The shielded pool reaching 30% of total supply is a metric worth watching closely. If that number continues climbing alongside successful mainnet deployments of NU7, it would suggest organic demand for Zcash’s core privacy proposition. If it stalls or reverses, it may indicate that the security scare did lasting damage to user confidence, regardless of how impressive the throughput numbers look on paper.