Crypto projects based on ZK technologies: a detailed review of the best solutions in 2024

How to prove that you possess information without revealing the information itself? That is exactly what Zero-Knowledge Proofs (ZKPs) do — a technology that revolutionizes notions of privacy and performance in blockchain. Entering 2024, this concept is becoming not just a theoretical achievement but a practical tool solving two critical problems in cryptoeconomics: ensuring transaction privacy and increasing network throughput.

Why are ZK proofs so interesting? Because they allow transactions to be made and information to be verified without disclosing confidential data. In an era of digital surveillance and growing scalability demands for blockchain, this technology becomes key. According to CoinGecko, as of May 2024, there are 40 ZK projects with a total capitalization of over $21.27 billion — a testament to the rapid development of this segment.

What is the basis of ZK proofs?

The essence of Zero-Knowledge Proofs is simple: one party (proves) to another (verifies) the truth of a statement without revealing any additional details. This is possible thanks to three fundamental properties:

• Completeness: If the statement is true, the verifier will be fully convinced without doubt.
• Soundness: If the statement is false, the fraudster will hardly be able to make it appear true (probability is minimal).
• Zero-knowledge: The verifier learns only the fact of the truthfulness, nothing more.

A classic analogy is the Ali Baba’s cave. A person can prove they know a magic word that opens a hidden door by repeatedly entering and exiting the cave. The word itself remains secret. This principle also works in cryptography, where voting systems can confirm a person’s right to participate, while their identity remains protected.

A practical result for blockchain: ZK-Rollups enable processing hundreds of transactions off-chain, submitting only proofs of their correctness to the blockchain. This reduces load on the main chain and speeds up processing without compromising security.

Where are ZK technologies already applied?

Zero-knowledge proofs have moved beyond theory, becoming tools for solving real-world problems:

Financial privacy. Cryptocurrencies like Zcash allow hiding sender, receiver, and transaction amount — while remaining verifiable in the ledger.

Network scaling. Projects zkSync and StarkWare use ZK-Rollups, achieving high throughput with low fees.

Voting protection. ZKP ensures vote anonymity while guaranteeing that each vote is counted.

Biometric authentication. Systems can verify identity without transmitting passwords, preventing interception.

Supply chain tracking. Companies prove compliance without revealing suppliers and manufacturing details.

Private smart contracts. Platforms like Aleph Zero and Mina Protocol enable executing contracts while hiding confidential input and output data.

Leading ZK projects of 2024 and their features

( Ethereum scaling solutions

Polygon Hermez — a decentralized layer-2 scaling solution for Ethereum using ZK-rollup architecture. The platform aggregates multiple operations into one, reducing gas fees by over 90% compared to mainnet. Its feature is a Proof of Efficiency consensus mechanism, requiring fewer resources while maintaining decentralization. The challenge is the technical barrier for integration.

Immutable X uses StarkEx engine from StarkWare. Focused on NFTs and Web3 games, offering zero gas fees. Current market cap of IMX is $192.28M. The complexity of ZK architecture may slow mass adoption by developers.

Loopring )LRC### — an Ethereum-based protocol aggregating hundreds of operations into one via zkRollups. It processes over 2000 transactions per second. Its unique architecture supports both AMM and traditional orderbook exchanges. Market cap of LRC is $68.39M. Drawback — dependence on complex technology requiring specialized knowledge.

( Layer 1 blockchains with built-in ZK privacy

Mina Protocol )MINA### stands out with an extremely small blockchain size — only 22KB. Achieved through zk-SNARKs that compress network state into compact snapshots. Anyone can verify network integrity from their smartphone. Consensus based on Proof of Stake (Ouroboros). Current market cap of MINA is $97.30M. Recent introduction of zkApps opens possibilities for off-chain computations. Challenge — the uniqueness of architecture complicates development.

dYdX (DYDX) — a decentralized exchange with infinite leverage, migrated to its own Layer 2 protocol based on StarkWare. Uses zk-STARKs for privacy (does not require trusted setup unlike zk-SNARKs). Version 4.0 runs on Cosmos SDK. Market cap of DYDX is $139.17M. Drawback — high entry barrier for ordinary investors due to decentralized custody of funds.

Aleph Zero (AZERO) combines PoS with directed acyclic graph (DAG) via AlephBFT consensus. Main feature — privacy layer Liminal, applying ZKP and secure multi-party computation (sMPC). Supports private smart contracts for enterprise applications. The challenge is practical scalability under real loads.

( Confidential ecosystems

Zcash )ZEC### — pioneer of ZK privacy, launched in 2016 as a Bitcoin fork. Uses zk-SNARKs to create shielded transactions hiding sender, receiver, and amount. Market cap of ZEC is $7.28B. Zcash has undergone multiple updates (Sprout, Sapling, Heartwood, Canopy), with recent ones including FlyClient encryption. The introduction of Halo technology in 2019 eliminated the need for trusted setup. Obstacle — regulatory skepticism towards anonymous cryptocurrencies.

Horizen (ZEN) — a Zcash fork expanding beyond privacy. Provides private infrastructure for messaging and dApps. Unique node architecture includes secure nodes and supernodes. Recently launched the first EVM-compatible sidechain EON. Challenge — balancing privacy with regulatory compliance.

Worldcoin (WLD) — ambitious project combining biometric verification with blockchain. Uses ZKP via Semaphore protocol to prove identity uniqueness without revealing biometric data. Market cap WLD is $1.26B. Allows users to prove group membership anonymously. Criticism relates to biometric data collection and centralization of smart contract control.

( Specialized computing solutions

Marlin )POND### — protocol for off-chain computations with integrity guarantees. Uses a combination of ZKP and trusted execution environments (TEE). Architecture includes gateway nodes, execution nodes, and monitoring nodes. Supports programs in Solidity, C++, Rust, and Go. Security is ensured through staking POND tokens.

Main challenges of ZK technologies

Despite potential, ZKP face real barriers:

Implementation complexity. Developers need deep understanding of cryptographic principles, limiting the pool of specialists and increasing error risk.

Computational load. Generating proofs requires significant resources, which can slow processing at high volumes.

Setup vulnerability. zk-SNARKs require a trusted setup phase — compromising parameters allows creating fake proofs.

Integration issues. Incorporating ZKP into existing systems demands overhaul of network protocols and infrastructure.

Regulatory risks. Data anonymization raises concerns in jurisdictions with strict financial oversight.

Scalability of solutions. Technology for handling massive volumes without speed loss is still evolving.

The future of the ZK ecosystem

Development trajectory promises significant breakthroughs. Focus is expected to shift toward user-friendly ZK systems capable of mass adoption. Innovations like zk-STARKs and improved zk-SNARKs will drive faster transactions without sacrificing security. Cross-chain privacy layers enabling secure operations between different blockchains are especially promising. As ZK functionality matures, projects will become pillars of private and efficient blockchain systems.

Final assessment

Zero-knowledge proofs are a cornerstone of next-generation blockchain innovations. By providing security, privacy, and scalability simultaneously, ZKP will reshape approaches to digital confidentiality. For investors and developers, tracking progress in this field is critical. Projects implementing ZK technologies demonstrate the path toward a fairer and more secure digital economy.