sproof is described as 'The European platform for digital trust, signature, and identity processes – built for organisations with the highest requirements for security, efficiency, and scalability. The solution combines six modular components and supports all eIDAS-compliant signature levels' and is a E-signature tool in the office & productivity category. There are more than 50 alternatives to sproof, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and iPad apps. The best sproof alternative is DocuSeal, which is both free and Open Source. Other great sites and apps similar to sproof are OpenSign, Docusign, LibreSign and DottedSign.