OnTask Signatures is an eSignature and workflow automation solution designed to take the hassle out of getting documents signed.
GroupDocs.Signature Alternatives
GroupDocs.Signature is described as 'Add different types of signatures like text, image, or digital signatures on electronic documents. Authenticate and sign documents with passwords or digital certificates' and is a E-signature tool in the office & productivity category. There are more than 25 alternatives to GroupDocs.Signature for a variety of platforms, including Web-based, SaaS, Android, iPhone and iPad apps. The best GroupDocs.Signature alternative is Docusign. It's not free, so if you're looking for a free alternative, you could try LibreSign or DottedSign. Other great apps like GroupDocs.Signature are Adobe Fill & Sign, PandaDoc, Please Sign Me and SignRequest.