In the wave of blockchain and Web3, decentralized technology offers users unprecedented freedom and control, but also brings challenges of fragmentation, complexity, and trust deficit.

Sign was born to bring transparency, security, and convenience to the trust mechanism in the trustless network by connecting real-world legal agreements with decentralized identities. As a platform that combines Web2 electronic signature functions with Web3 blockchain advantages, Sign not only provides a seamless user experience but also drives innovation in cross-chain interoperability and data privacy. This article will delve into Sign's core philosophy, achievements, funding background, vision, and summarize its unique value in the Web3 ecosystem.

A bridge of trust connecting Web2 and Web3

The core philosophy of Sign is to 'bring trust to the trustless network'. In a decentralized environment, trust no longer relies on a single intermediary but is achieved through the combination of technology, transparency, and legal efficacy. Sign combines the mature functions of traditional electronic signature platforms (such as document uploading, signature field creation, status tracking, etc.) with the public verifiability of blockchain, creating a brand new trust model. Key innovations include:

1. Legal efficacy and blockchain transparency: Sign's digital signatures use EIP-712 or equivalent standards, complying with the digital signature legal requirements of major countries (such as the United States and the European Union), ensuring transparency and immutability through blockchain records.

2. Decentralized identity and privacy protection: Through keyless encryption (AES-256-GCM and ECIES), users do not need to remember passwords, and document data is decrypted only in the user's browser, ensuring privacy and security.

3. Cross-chain compatibility: Breaking the blockchain silo, supporting users of Bitcoin, EVM, TON, Solana, etc., to sign agreements through different wallets, promoting interoperability in Web3.

Sign's philosophy is not just about technological innovation, but about redefining trust: users do not need to rely on centralized platforms, but can independently control data and agreements through decentralized technology.

Balancing technological breakthroughs and user experience

Since its launch, Sign has achieved significant accomplishments in technological innovation and user experience:

1. Cross-chain protocol signing: By using a delayed verification model, Sign frees itself from dependence on smart contracts and enables interaction with multi-chain wallets. Users of Bitcoin, EVM, etc., can seamlessly sign agreements on the same platform, breaking down the barriers of blockchain fragmentation.

2. High-performance optimization: The early version faced criticism from users due to RPC errors and interaction delays. Sign adopted an AWS open-source backend, combined with frontend optimizations, CDN, and edge servers, eliminating wallet errors and delays, creating the fastest version to date.

3. Decentralized Storage: Completed protocols are automatically stored on Arweave, achieving permanent and free decentralized storage. Users can independently access and verify documents through an upcoming open-source tool, ensuring data remains secure and accessible even if Sign stops service.

4. Privacy and security: Sign does not store sensitive user information (such as email and Telegram handles) and protects document privacy through industry-leading encryption technology. Its business model explicitly commits to not selling user data, earning user trust.

5. Global compliance: Sign's signatures comply with international digital signature laws, supporting zero-cost public verification, providing reliable legal protection for enterprises and individuals.

These achievements not only reflect Sign's breakthroughs in technology but also highlight the balance it has found between decentralization and usability.

Funding Background

From 2021 to 2025, the project has raised over $28 million in funding, including from YZi Labs, Mirana Ventures,
Draper Associates, Peak XV Partners, and many other investment firms.

Sign's unique value

Through innovative technology and clear concepts, Sign is reshaping the trust mechanism in the trustless network. It combines the user-friendliness and legal efficacy of Web2 with the transparency, privacy protection, and cross-chain compatibility of Web3, addressing the core issues of blockchain fragmentation, privacy security, and interaction complexity. Its achievements—from cross-chain protocol signing to high-performance optimization to decentralized storage—demonstrate its technical strength and commitment to user orientation. The funding background supports its rapid development, while its vision points to a global, autonomous, and seamless trust network.