Sign is a cross-chain trust platform that aims to make Web3 as simple and secure as real life, facilitating contract signing and identity verification. It combines traditional electronic signatures with blockchain transparency through three main products: Sign Protocol, TokenTable, and Signatures, helping users and developers build a trustworthy digital world.
What is Sign
Sign is a decentralized trust platform designed specifically for multi-chain ecosystems, aiming to break down the fragmentation barriers of blockchain networks through cross-chain proof protocols and decentralized signature solutions, enhancing the efficiency and security of trust verification. Its core philosophy is 'bringing trust to a trustless network,' connecting the user-friendly experience of Web2 with the transparency and autonomy of Web3 through the integration of legally valid digital signatures, zero-knowledge encryption, and decentralized storage.
Sign's value proposition lies in providing users with a seamless cross-chain trust experience while offering developers flexible tools to support the development and deployment of decentralized applications. Whether signing legally binding agreements, managing token distributions, or verifying the authenticity of off-chain actions, Sign provides businesses and individuals with a reliable and scalable trust infrastructure through its full-chain compatibility and privacy protection mechanisms.
Technical Features of Sign
Sign is a decentralized trust platform designed for a multi-chain ecosystem, integrating cross-chain interoperability, zero-knowledge encryption, and decentralized storage, aimed at providing Web3 users and developers with a secure, transparent, and efficient trust mechanism. Its technical architecture is based on the Cosmos SDK, integrating LayerZero and IBC protocols, supporting multi-chain interactions such as Ethereum, Solana, TON, and Bitcoin. Sign uses an open-source backend on AWS, combined with CDN and edge servers, eliminating RPC latency and providing a high-performance experience. Zero-knowledge encryption (AES-256-GCM and ECIES) ensures data privacy, with documents and proofs decrypted only in the user's browser. Through deep integration with Arweave, Sign achieves permanent, free decentralized storage, allowing users to access data independently through open-source tools. It supports multiple virtual machines including EVM, MoveVM, and CosmWasm, attracting diverse developers and expanding ecological application scenarios.
Funding Overview
Sign has raised a total of $28.65 million, attracting attention from leading investment institutions:
2021-07-27: $650,000 seed round financing, laying the foundation for early product development.
2022-03-09: $12 million funding, led by Sequoia Capital, for the expansion of cross-chain functionality and performance optimization.
2025-01-28: $16 million funding, with participation from YZi Labs, Hack VC, Amber Group, Altos Ventures, etc., accelerating the global promotion of Sign Protocol and TokenTable and the integration with Arweave.
Innovation Points
Cross-Chain Interoperability: Breaking free from smart contract dependency through a delayed verification model, supporting multi-chain wallet interactions (such as Ethereum, Solana, Bitcoin), enabling cross-chain protocol signing and proof verification.
Balancing Privacy and Transparency: Combining zero-knowledge encryption and on-chain verification to ensure data privacy while providing public verifiability.
User-Friendly Design: Following the 'Keep It Simple, Signer' philosophy, simplifying the signing and proofing process, and lowering the technical threshold for Web3.
Openness and Autonomy: Through Arweave storage and open-source tools, users have complete control over their data, ensuring that even if Sign ceases operations, the data remains accessible.
Multi-Scenario Applications: Supporting various use cases such as DeFi certificate verification, enterprise compliance, NFT transaction verification, and expanding Web3 trust scenarios.
Summary
Sign is a blockchain platform centered on cross-chain proof and decentralized signatures, addressing the pain points of blockchain fragmentation, privacy security, and trust verification. Its technical features—cross-chain compatibility, zero-knowledge encryption, decentralized storage, and high-performance architecture—provide users and developers with efficient and secure trust solutions. With $28.65 million in funding, top institutional support, and an ecosystem serving over 200 projects and 40 million users, Sign demonstrates tremendous potential in the Web3 trust infrastructure field.