Proof (formerly Notarize)
The world's leading identity-assured transaction platform and RON provider.
The API-first eSignature solution for seamless document workflows and legally binding signatures.
Dropbox Sign, formerly HelloSign, stands as a premier eSignature platform in 2026, distinguished by its 'API-first' architecture that allows developers to embed signing flows directly into third-party applications. Since its acquisition and integration into the Dropbox ecosystem, it has evolved from a simple signing tool into a robust document lifecycle engine. The platform utilizes a secure, RESTful API architecture with a focus on high availability and developer experience. Its technical infrastructure supports advanced cryptographic hashing to ensure document integrity and provides comprehensive, tamper-proof audit trails that meet ESIGN, UETA, and eIDAS requirements. In the 2026 market, Dropbox Sign is positioned as the go-to solution for SMBs and mid-market enterprises that require deep integration capabilities without the enterprise bloat of legacy competitors. Its performance is characterized by rapid PDF rendering and a mobile-responsive UI that maintains high conversion rates for signature collection. With native integrations across the Dropbox suite, Google Workspace, and Salesforce, it serves as a critical bridge between static document storage and active business execution.
Allows developers to embed the entire signing experience in an iframe or modal within their proprietary software via the SDK.
The world's leading identity-assured transaction platform and RON provider.
AI-powered document automation to accelerate deal cycles and streamline eSignatures.
The API-first, pay-as-you-go e-signature platform for modern developers and high-growth automation.
The intelligent agreement management platform that accelerates business through AI-driven workflows.
Verified feedback from the global deployment network.
Post queries, share implementation strategies, and help other users.
Highest level of eIDAS compliance using digital certificates to verify signer identity.
Signers must enter a one-time code sent to their mobile device before accessing documents.
Real-time field validation (e.g., zip code format, date range) during the signing process.
Configurable cron-based triggers that send email notifications to pending signers.
Full CSS and asset control over the signing interface and email communications.
Enables signing on a shared device (tablet/mobile) with local security protocols.
Manual paperwork for new hires causes delays and data entry errors.
Registry Updated:2/7/2026
Interrupting the sign-up flow to send an external email contract drops conversion.
High volume of documents needing strict legal compliance and audit trails.