Applications
Gaming
- Dark Forest: an MMO space-conquest game and their ZK Circuit Walkthrough
- Isaac: a physics-powered onchain reality on Starknet and their blog
- Crypto Maze: action-packed MMO
- Zordle: the first end-to-end web app built using Halo 2 ZK proofs
Payment
- Zcash: a privacy-protecting, digital currency
- Monero: private, decentralized cryptocurrency
- Manta: a Plug and Play Private DeFi Stack
- SwapCT: Swap Confidential Transactions for Privacy-Preserving Multi-Token Exchanges
- Zef: Low-latency, Scalable, Private Payments and their Slides
- Amona: A protocol for private, asset-agnostic digital cash and their use of recursive zkps
- ZETH: Integrating Zerocash on Ethereum
Mixer
- CoinJoin: an open-source way to mix bitcoins
- Tornado Cash: Introducing Private Transactions On Ethereum
- Otter Cash: A privacy layer for the Solana ecosystem
- Mobius: Trustless Tumbling for Transaction Privacy
- TumbleBit: An Untrusted Bitcoin-Compatible Anonymous Payment Hub
- Mixcoin: Anonymity for Bitcoin with accountable mixes
- CashShuffle: background coin shuffling for Bitcoin Cash
- MicroMix: A noncustodial Ethereum mixer
- Juicer Protocol: trusted and secure
Identity
- zkKYC: A solution concept for KYC without knowing your customer
- zkID.app: A Privacy-Preserving Passport to the Web 3.0 World
- Notebook: a zero-knowledge B2B2C identity protocol
- Iden3: future-proof tech stack for self-sovereign identity
- Polygon ID: identity system with programmable privacy
- Sealance: building financial compliance into digital currencies
- Humanode: biologically verified human nodes for a fair financial system
- OutDID: your zero-knowledge, decentralized KYC filter of blockchain users
- IdentityBlockchain: state-certified electronic identities to establish blockchain identities
Wallet
- Argent: smart contract wallet based on zkSync
- Numio: Layer 2 focused wallet built on zkSync
- Zkopru: Affordable Ethereum Privacy Wallet
- Bunkyr: zero‑knowledge security without seed phrases or backup codes
- Wasabi Wallet: non-custodial, privacy-focused Bitcoin wallet
Crosschain
- ZkLink: cross chain amm swap protocol powered by ZK-Rollup
- Mystiko Network: Anonymous Protocol for a Cross-Chain Network
- Penumbra: a shielded, cross-chain network
- Zecrey: Bringing Cross-chain Privacy to Digital Assets
- Suez: move Eth to the Starknet ecosystem
- ZKCross: a trustworthy cross-chain protocol built with multichain zkRollup
- Electron Labs: ZK Light Clients for NEAR Rainbow Bridge
- Nil Foundation: Mina's bridge to Ethereum
- ZeroPool: a fully private multi-blockchain solution
- Raze Network: Multichain Privacy Middleware
- Zendoo: A zk-SNARK enabled verifiable cross-chain transfer protocol and their whitepaper
Marketplace
- Modulo Zero: on-chain solution for private data exchange and their Repo
- Ruby Protocol: Building a Cross-chain Cryptographic Infrastructure for Data Monetization
- zkPoD: A decentralized system for data exchange
Fiat On-ramp
User Profiling
- FirstBatch: create a representation of your identity from your social data
- Interep: verify users' reputation without exposing their identities
Data Infrastructure
- Filecoin: Zero Knowledge and the Filecoin Network
- ZK Machine Learning: truly private machine learning, with zk-SNARKs and blockchain
- Nectar Protocol: Web3 infrastructure for healthcare and their documentation
- zk-SQL: ZK-based engine for self-sovereign SQL queries
Artificial Intelligence
- zk-MNIST: web frontend app + Jupyter notebook with ML model generation and their demo
- zkCNN: GKR-based zero-knowledge proof protocol for CNN model inference and their paper
- Modulus Labs: bringing powerful ML models on-chain and their blogs
DeFi / DEX
- Panther Protocol
- Loopring Launches zkRollup Exchange
- Railgun: brings privacy to cryptocurrencies
- EdgeSwap: Ethereum-based layer 2 trading protocol
- ZigZag: ZK Rollup order book DEX
- Mute: a ZK-Rollup based AMM exchange
Tokens / NFT
- StealthDrop: Anonymous Airdrops using ZK proofs
- ZKP Private Airdrop and their Zk Merkle Airdrop Library
- zk-NftMint: Mint an NFT if you know a secret and their contract
- Immutable X: the first layer-2 scaling solution for NFTs on Ethereum
Voting / Participation
- Zero Knowledge Message Board by nulven, yush_g and their article
- Semaphore: a privacy gadget built on Ethereum
- zkC.R.E.A.M: Confidential Reliable Ethereum Anonymous Mixer
- Cabal: create credibly pseudonymous channels based on members' Ethereum activity
- OVOTE: Offchain Voting with Onchain Trustless Execution and their document
- Scaffold-ETH: Prove Membership with Circom and Zero Knowledge
- Double Blind: semi-anonymously sign messages for a group of people and their documentation
- Vocdoni: A decentralized self sovereign governance platform and their architecture