Aleo is a developer platform for building fully private, scalable, and cost-effective applications. It uses zero-knowledge cryptography to move smart contract execution off-chain, enabling a diverse range of decentralized applications that are both entirely private and can scale up to thousands of transactions per second.

Octra is an FHE blockchain network with support for isolated execution environments. The majority of the codebase is developed in languages such as OCaml, AST, ReasonML (the language for smart contracts and applications for interacting with the Octra blockchain network), and C++.

Arcium is a parallelized confidential computing network. It provides developers and applications with a trustless, verifiable, and efficient framework to run encrypted computations. Arcium aims to bring confidentiality to every on-chain application and become the global computing network for the decentralized internet. Multiparty computation eXecution Environments (MXEs) are the backbone of the Arcium Network. They combine Multiparty Computations (MPC), Fully Homomorphic Encryption (FHE), Zero-Knowledge Proofs (ZKPs), and more to enable encrypted computations.

Zcash is a privacy-preserving cryptocurrency that provides anonymous value transfer using zero-knowledge cryptography. The protocol offers the option to make transactions either shielded, which will be completely anonymous, or transparent, which will be visible on the Zcash blockchain.

Manta Network is the multi-modular ecosystem for zero-knowledge (ZK) applications. Manta Atlantic, the fastest ZK L1 chain, brings programmable privacy to web3 through compliant on-chain privacy and identity. Manta Pacific, the unique L2 ecosystem for EVM-native ZK applications, provides a scalable and inexpensive gas-fee environment for ZK applications to deploy simply using Solidity. Together, Manta Atlantic and Manta Pacific deliver an unparalleled experience for the next generation of web3 application development and adoption with the applied usage of zero-knowledge cryptography.

FLock.io aims to build a decentralized, privacy-preserving solution for Artificial Intelligence. It has proposed a research initiative called Federated Learning Blocks (FLocks for short), which uses blockchain as a coordination platform among data holders to conduct Machine Learning while keeping data local and private. By replacing the central entity that collects data and organizes machine learning with blockchain, FLocks aims to empower users to mine insights from their own data and monetize at their own discretion.

Tari is a blockchain protocol focused on digital assets, built in Rust, private by default, open source, and architected as a merge-mined sidechain with Monero. It enables creators to design new types of stories and experiences.

Nesa is the lightweight Layer-1 executing critical AI inference on queries that require a high degree of privacy, security, and trust using ZKML on-chain.

Automata Network is a modular attestation layer that extends machine-level trust to Ethereum by leveraging optimistic rollups and zero-knowledge proofs in its Proof of Machinehood approach. The application-specific rollup allows on-chain verification for out-of-protocol computation, which creates an unbroken chain of trust that extends upwards through the entire Web3 stack.

Namada is a proof-of-stake Layer 1 for interchain asset-agnostic privacy. It natively interoperates with fast-finality chains via IBC and with Ethereum via a trustless two-way bridge. For privacy, Namada deploys an upgraded version of the Multi-Asset Shielded Pool (MASP) circuit, which allows all assets to share a common shielded set. Namada is Anoma's first fractal instance and deploys Version 1 of the Anoma protocol.

Brave is a privacy-focused internet browser that aims to change the digital advertising relationship between customers and advertisers. BAT is the native token of the platform, which is used as a payment mechanism between advertisers, publishers, and users.

The Oasis Network is a Layer 1, proof-of-stake, decentralized network designed to support the next generation of blockchain applications. It is incredibly versatile, agile, and customizable. Moreover, it supports confidential smart contracts, enabling sensitive data to be used by Dapps and unlocking new use cases and applications of blockchain technology.

Eigen Network aims to facilitate a programmable privacy layer for every Web3 participant in an EVM-compatible ecosystem by using zk-zkVM. Eigen ZKZRU is a new ZK-ZKRollup protocol that enables address anonymity, smart contract data and logic confidentiality. Eigen Secret is a decentralized asset management platform that provides keyless signing and social recovery for cross-device, multi-party collaboration and fine-grained payments over Web3.

Fhenix is the first confidential blockchain powered by fully homomorphic encryption. Through the usage of fhEVM, Fhenix enables Ethereum developers to seamlessly build encrypted smart contracts and perform encrypted computation of data, all while using Solidity and other familiar, easy-to-use tools.

Secret Network is an independent, base-layer blockchain network built using the Cosmos SDK. It supports smart contract development and introduces data privacy by default for these contracts, enabling developers to build decentralized applications that also protect user data and preserve privacy. The protocol implements "programmable privacy," which is defined as arbitrarily complex data privacy controls within an application. Secret Network calls these privacy-preserving applications "Secret Apps." On February 13, 2020, Secret Network's mainnet went live, and its goal is to become the data privacy center of Web3.

Espresso is a global confirmation layer that provides L2 chains with fast, reliable transaction confirmations backed by BFT consensus. Espresso's confirmation layer can prevent sequencer equivocation, protect against reorgs, and reduce finality risk for solvers in intent-based systems. Its versatility means chains can also use it as a decentralized sequencer and low-cost data availability layer.

Aleph Zero is a public blockchain with enhanced privacy based on an innovative, peer-reviewed Directed Acyclic Graph (DAG) and a Proof-of-Stake (PoS) consensus mechanism. It also incorporates the Substrate framework for interaction. This novel consensus has been developed with a privacy structure based on ZK-SNARKs cryptography and Secure Multi-Party Computation (sMPC). The protocol focuses on creating privacy-preserving distributed ledger technology (DLT) as an alternative to existing infrastructure barriers in sectors such as ESG, automotive, the Internet of Things (IoT), and healthcare.

Multiple Network is a Web3 Privacy Acceleration solution for AI that provides privacy protection and data acceleration services based on P2P and SD-WAN technologies. By aggregating the bandwidth of distributed nodes, it offers anonymous communication and encrypted transmission services. Multiple Network provides higher bandwidth and lower latency, widely used in AI model invocation, search engine interactions, and the encryption and acceleration of large-scale sensitive data, enhancing the efficiency and security of AI model training and inference.

Aztec Network is the first private ZK-rollup on Ethereum, enabling decentralized applications to access privacy and scale. Its industry-standard PLONK proving mechanism is used by the leading zero-knowledge scaling projects, ensuring the security of its rollup.

Zama is a cryptography company building open source homomorphic encryption tools for developers.Homomorphic encryption (FHE) is a technology that enables processing data without decrypting it. This can be used to create private smart contracts on top of public, permissionless blockchains, where only specific users would be able to see the transaction data and contract states.

Nym is a privacy platform that provides strong network-level privacy against sophisticated end-to-end attackers, and anonymous access control using blinded, re-randomizable, decentralized credentials. It protects privacy at the network layer by encrypting and relaying users' internet traffic through a multi-layered network called a mixnet. In each layer of the mixnet, mix nodes mix users' internet traffic with that of other users, making communications private and hiding metadata such as IP address, who they are talking to, when and where, and more.

Monero is an open-source, privacy-oriented cryptocurrency that was launched in 2014. Its blockchain is intentionally configured to be opaque, making transaction details such as the identity of senders and recipients and the amount of each transaction anonymous by disguising the addresses used by participants.

Dusk Network is the privacy blockchain for financial applications. Its mission is to enable enterprises of any size to collaborate at scale, meet compliance requirements and ensure that personal and transaction data remains confidential.

Beldex is a privacy-based ecosystem comprising of privacy-first decentralized applications, such as BChat, BelNet, the Beldex Browser, the Beldex Privacy Protocol, and the Beldex Bridge.

RAILGUN is a privacy system built directly, enabling users to interact directly with DEXs and other DeFi applications. Individuals can engage in cryptocurrency and DeFi-based activities, ensuring financial freedom without worrying about being spied on by anyone.

Tornado Cash is a decentralized and non-custodial privacy solution. It improves transaction privacy by breaking the on-chain link between source and destination addresses. This is achieved through a smart contract that accepts ETH and other token deposits from one address, and enables their withdrawal from a different address.

PlatON is a next-generation Internet infrastructure protocol based on blockchain and supported by a privacy-preserving computation network. By combining blockchain and privacy-preserving computation technologies, PlatON is creating a decentralized and collaborative AI network and global brain to promote the democratization of AI and enable the safe development of artificial general intelligence.

NuLink provides technology for decentralized applications that preserves privacy, via APIs. NuLink enables and makes it easy for developers, startups, small businesses, and enterprises to build their own applications with the best security and privacy practices.

Holonym is a privacy-preserving passport for Web3. It enables users to perform anonymous "KYC" and prevent Sybil attacks. It is also constructing the necessary infrastructure for decentralized wallet recovery.

Concordium is a proof-of-stake blockchain with identification built into the protocol to meet regulatory requirements, while delivering a user-friendly platform that can handle smart contracts. It utilizes zero-knowledge-proofs (ZKP) to allow parties to verify information without exchanging or storing that information on-chain, other than hash functions, so users can trust that their confidential business will not become anyone else's business. Concordium's unique ID disclosure mechanism enables regulators to revoke privacy and identify suspected bad actors and illegal transactions.