EthSign

EthSign is a decentralized electronic signature platform designed to bridge the gap between traditional legal agreements and blockchain technology. It offers a user experience and legal validity comparable to Web 2.0 e-signing services while leveraging public blockchains to enhance transparency, security, and trust. Users can upload documents, create signing fields, add annotations such as text fields and checkboxes, invite co-signers, track signing progress, and download completed agreements. The platform supports digital signatures compliant with EIP-712 and equivalent standards, embedding signatures directly into documents for verifiable authenticity.

EthSign addresses key challenges in Web3, including blockchain fragmentation and interoperability. Instead of relying on smart contracts, it uses a novel lazy verification model where data integrity is validated client-side upon loading, enabling cross-chain interactions among Bitcoin, EVM-compatible chains, TON, and Solana wallets. This approach eliminates common wallet errors and delays caused by unreliable RPCs. EthSign also balances decentralization and usability by storing in-progress documents centrally for performance, while settled contracts are permanently stored on Arweave, ensuring long-term access and cryptographic proof without dependence on the platform.

Security and privacy are core to EthSign’s design. It employs industry-leading keyless encryption, so users never need to remember document passwords, and encryption applies retroactively to past documents once enabled. Optional email and Telegram notifications are implemented without persisting user data on servers. The platform’s backend runs on AWS for reliability and speed but maintains decentralized settlement and open-source verification tools to ensure trustlessness. Developers and enterprises can integrate EthSign to add legally binding, blockchain-verified signatures to their workflows with comprehensive documentation and open-source tools available to get started.