One top pick is Acrobat Sign, part of Adobe Acrobat. It's a full featured tool for creating, editing and signing PDFs. Among its advantages are real-time document tracking, bulk sending and tight integration with other Adobe tools. That makes it good for individuals and companies of all sizes.
Another top pick is Docusign, an intelligent agreement management platform that uses AI to speed up agreements. Docusign offers eSignature, Contract Lifecycle Management and other tools to help you manage complex agreements. With its many integrations and flexible pricing plans, it's good for companies large or small that want to speed up productivity and contract review cycles.