Polyhedra Network develops Web3 interoperability, scalability, and privacy infrastructure using zero-knowledge proof (ZKP) technology. The network provides trust-minimized solutions for asset transfers, message passing, and data sharing between Web2 and Web3 systems. ^{[1] [12]}

Overview

Polyhedra Network develops advanced Web3 interoperability, scalability, and privacy infrastructure using zero-knowledge proof (ZKP) technology. The network offers trust-minimized solutions for secure asset transfers, message passing, and data sharing across diverse Web2 and Web3 platforms. Its team includes researchers and engineers from leading universities, focusing on building a comprehensive suite of ZKP-based tools to address key challenges in blockchain connectivity.

A central product is zkBridge, a trustless cross-chain bridge that leverages zero-knowledge proofs to validate consensus between blockchains without relying on external trust assumptions, reducing verification costs and improving security. Polyhedra also employs distributed proof generation systems like deVirgo and paraPlonk to accelerate ZKP computation and support large-scale, decentralized zkRollups and zkEVM solutions.

Additionally, the network offers zkDID, a decentralized identity system based on soul-bound tokens and verifiable credentials, enabling scalable, privacy-preserving identity verification interoperable with both Web2 and Web3 environments. The platform is expanding its integrations and developer tools to support broader adoption of interoperable blockchain and Web3 applications. ^[1] 

Products

EXPchain

EXPchain is a blockchain protocol that supports scalable, verifiable, and privacy-focused AI applications. It integrates zero-knowledge machine learning (zkML) with a Proof of Intelligence (PoI) framework to ensure trust and accountability in AI systems while protecting sensitive data and intellectual property. Key components include the Expander proof system, a high-performance zk prover, and zkPyTorch, a toolkit that facilitates zkML integration into traditional AI workflows.

Built on a zk-native blockchain infrastructure, EXPchain offers features like zkBridge for cross-chain interoperability, native zkRollup scalability, and zkML watermarking for large language models. The platform targets transparency, security, and scalability to foster trust in finance, healthcare, and software development industries. By lowering technical barriers and providing modular tools, EXPchain aims to establish a trusted ecosystem where AI applications can be privacy-preserving, verifiable, and accountable. ^{[2] [6]}

Features

EXPchain introduces core features that support scalable, verifiable, and privacy-preserving AI applications through zero-knowledge proofs.

Expander's zk proof system delivers high-speed performance for zkML tasks, generating proofs for models like VGG-16 and Llama 3.1 significantly faster than existing systems. It supports future improvements through planned hardware acceleration and distributed proving, aiming for real-time proof generation to eliminate latency in AI verification.

ExPoS (Expanded Proof of Stake) serves as EXPchain's consensus model, integrating staking across multiple blockchains using zkBridge. This enables omnichain staking, improved liquidity use, and broad interoperability, ensuring secure and transparent coordination in decentralized networks.

zkPyTorch provides a developer-friendly framework for converting PyTorch-based AI models into zk circuits. It automates circuit generation and optimizes proof creation, reducing deployment time and costs while maintaining compatibility with modern machine learning workflows. ^[2]

Tech Stack

EXPchain’s technology stack supports verifiable, private, and scalable AI systems through a zk-native blockchain infrastructure and advanced cryptographic tools.

zkML enables proof-based verification across the AI lifecycle—covering inference, model audits, and training validation—without exposing sensitive data or intellectual property. This forms the basis for privacy-preserving AI features such as LLM watermarking, secure multiparty computation, and compliance audits. The blockchain is built for AI integration, with native zk support, single-slot finality, and modular scalability via zkRollups and appchains.

Key components include Proof of Intelligence (PoI), which ties AI model authenticity and compliance to verifiable on-chain records, and zkBridge, which enables trust-minimized, cross-chain interoperability. Expander, EXPchain’s optimized proof system, improves proving efficiency, making zk-based AI practical at scale. Features like zkLogin allow secure, OAuth-based user onboarding with account abstraction. At the same time, SSF (Single Slot Finality) shortens confirmation times and mitigates MEV risks, improving network security and user experience across AI-integrated applications. ^[2]

zkBridge

zkBridge is a cross-chain communication protocol that uses zkSNARKs to verify state transitions between blockchains without requiring trust in third parties. It includes two main components: a block header relay network and an updater contract. The relay network collects block headers from the sender chain, generates zero-knowledge proofs confirming their validity, and submits them to the updater contract on the receiver chain. The updater contract maintains a light-client state and updates its record of the sender chain’s main chain by adding the new block headers upon verifying the proofs. This process allows secure and efficient cross-chain synchronization. ^[7]

Legend Games

Legend Games is building an omnichain gaming infrastructure that enables interoperability across blockchain networks using zkBridge technology. Its platform supports cross-chain capabilities for games and dApps, offering tools like omnichain ERC-721 and SBT protocols, random number generators, and cross-chain mystery boxes to enhance in-game experiences.

The project supports a decentralized developer ecosystem by providing interoperability middleware, SDKs, and grants. This approach encourages developers to build and deploy their projects within the Legend Games ecosystem, promoting a flexible and interconnected Web3 gaming environment. ^[9]

Proof Cloud

Proof Cloud is a platform developed by Polyhedra Network in partnership with Google Cloud. It is designed to significantly reduce the computational costs of zero-knowledge (ZK) proofs by over 90%. It aims to improve the performance and accessibility of ZK technology for developers across Web2 and Web3 environments, supporting faster and more efficient proof generation.

A key component of Proof Cloud is Proof Arena, a benchmarking tool that allows developers to test and compare the performance of various ZK prover architectures under controlled conditions. This transparency helps users select the best proving systems for their needs. The platform has gained support from major industry players such as Polygon, Linea, and Valida, marking a step toward broader adoption and innovation in zero-knowledge proof technology. ^{[5] [8]}

Expander

Expander is a zero-knowledge proof (ZKP) system developed by Polyhedra Network to address the inefficiency of proving Keccak-256, the cryptographic hash function used across Ethereum. Unlike ZK-friendly hash functions, Keccak requires millions of gates to represent in a circuit, making it costly and slow to prove. Expander significantly improves performance by combining the GKR protocol with efficient polynomial commitment schemes from Orion and Brakedown, avoiding the need for FFTs and enabling compatibility with any finite field.

Expander operates over a Mersenne prime field and uses a custom compiler to convert computations into layered arithmetic circuits optimized for ZK proofs. It achieves high throughput, generating proofs for up to 4,500 Keccak-f permutations per second on a single Apple M3 Max or AMD 7950X3D CPU, with low memory overhead. This performance enables practical applications like proving large-scale data inclusion in Ethereum’s Merkle Patricia Tries for interoperability solutions such as zkBridge. By making Keccak proofs efficient, Expander supports scalable, Ethereum-compatible ZK applications in areas like zkVMs, zkML, and cross-chain communication. ^{[3] [4]}

ZKJ

$ZKJ is the native token of Polyhedra Network and plays a central role in powering its infrastructure. It is used to pay for gas fees on EXPchain, cover service costs for Polyhedra’s zero-knowledge proof systems, and handle transaction fees on zkBridge, including those for cross-chain protocols like LayerZero.

In addition to utility functions, $ZKJ supports network participation through staking, enabling roles such as governance voting and transaction verification and contributing to proof generation. It also contributes to network security by working with EigenLayer restaking to secure Polyhedra’s Ethereum–Bitcoin trust-minimized bridge. ^[10]

Tokenomics

ZKJ has a total supply of 1B tokens and has the following allocation: ^[10]

• Ecosystem: 32%
• Token purchasers: 28%
• Community, airdrop, and other: 15%
• Foundation reserves: 15%
• Core Contributors: 10%

Partnerships

• BNB Chain
• AltLayer
• Nubit
• BounceBit
• EigenLayer
• Renzo Protocol
• Alchemy Pay
• Arbitrum
• Caldera
• Aspecta
• Manta Network
• Lagrange
• Galxe