List of the Top 5 eSignature APIs for Microsoft SharePoint in 2026

SignNow, developed by airSlate, is an electronic signature solution that empowers businesses to operate seamlessly across various devices, at any time and from any location. It stands out as the ideal choice for small to medium-sized businesses and mid-markets, thanks to its user-friendly design, clear pricing structure, adaptable settings, and straightforward API integration. With SignNow, users can easily sign documents online, create agreements, negotiate contracts, and process payments through legally-recognized electronic signatures. The platform’s intuitive design facilitates quick account setup, allowing users to upload documents and obtain electronic signatures in mere minutes without the need for extensive training or software installations. While renewing subscriptions can be costly on other platforms, airSlate SignNow offers a pay-per-use model, eliminating hidden costs associated with additional templates or document sends. Enhance team collaboration and accelerate the deal-closing process whether in person or virtually, while benefiting from comprehensive insight into the document signing workflow through its advanced features customized to fit your specific requirements. This ensures that users can manage their signing processes efficiently and effectively.

Transform and expedite your workflows with Acrobat Sign, the exclusive e-signature platform that merges the powerful features of Adobe Acrobat into one cohesive solution. Whether you're on a mobile device or desktop, you can easily access and sign Acrobat PDF documents from anywhere. Your recipients enjoy an effortless signing experience, as there is no requirement for downloads or registrations. The complimentary Adobe Scan mobile app allows you to conveniently scan and upload PDFs directly from your device. Join a community of over 500,000 organizations that are improving their customer interactions through the benefits of electronic signature technology and Acrobat PDF capabilities. Adobe streamlines the processes of creating, editing, collaborating, e-signing, and sharing PDFs across all devices. You have the flexibility to select from various scalable document signing options customized to your unique business needs, whether you require comprehensive PDF document management or not. As the favored e-signature solution for Microsoft, Acrobat Sign integrates flawlessly with a wide array of Microsoft applications, enabling you to send and sign PDFs without disrupting your workflow. This seamless integration not only enhances productivity but also ensures that your tasks are handled efficiently and effectively. Discover the power of Acrobat Sign and watch your efficiency soar as you embrace modern digital solutions.

OneSpan Sign is a reliable electronic signature platform that caters to numerous prominent brands across the globe. Highly regarded by respected analyst firms and regulatory industries, OneSpan Sign is recognized as a flexible and scalable solution that empowers businesses to manage identities, secure access, authenticate transactions, and protect assets in various sectors such as finance, e-commerce, government, and healthcare. Whether deployed in the cloud or installed on-premises, OneSpan Sign efficiently captures signatures at points of sale, in remote settings, or directly through websites, serving as a comprehensive solution for contemporary business requirements. Its adaptability to various environments not only enhances signature processes but also increases overall operational efficiency for organizations aiming for improved workflow. Ultimately, OneSpan Sign positions itself as an essential tool for businesses striving to streamline their signing operations while maintaining security and compliance.

TurboSign is a digital signature tool embedded within the TurboDocx platform, aimed at streamlining the swift and secure transmission, signing, and oversight of legally binding documents as part of an automated process. Users are able to upload a variety of document formats, such as PDFs, assign areas for signatures, and quickly send them out for signing, which facilitates workflows involving multiple parties and boosts the efficiency of contract execution. The platform features audit trails and tracking functionalities that log signature actions, ensuring adherence to legal standards and fostering transparency throughout the signing process. Fully compatible with TurboDocx’s document generation tools, TurboSign can also operate independently, allowing users to move effortlessly from document creation to final approval within a cohesive workflow. It further supports integration with APIs and automation frameworks, enabling developers to embed signature functionalities directly into their applications and trigger signing actions programmatically. This adaptability positions TurboSign as a vital resource for companies looking to enhance their document management processes while also improving overall operational efficiency. With its user-friendly interface and robust capabilities, TurboSign is not only a solution for signing documents but also a comprehensive tool for optimizing business workflows.

There are several types of signatures you can use to sign documents, such as digital, electronic, biometric, and national ID. You have the flexibility to either decline or agree to sign the documents presented to you. Furthermore, you can delegate the signing process, co-sign, assign tasks, and utilize a range of other functionalities. Documents can be sent in various file formats, including but not limited to PDF and DOC. Additionally, you can upload files from cloud storage services like Google Drive, One Drive, and DropBox. The platform also allows you to reuse templates you have previously created. You can monitor and keep track of all documents that are sent for signature, establish different signing orders, and communicate through comments and private messages with signers. Cygnature ensures the security of your documents through Blockchain technology, with all document-related activities being recorded and time-stamped on the Blockchain. The Cygnature mobile app streamlines the document signing process, making it quick and efficient. Moreover, you can effortlessly integrate e-signature APIs into your existing systems, providing you with exceptional flexibility. Comprehensive assistance is available from the API documentation all the way through to the actual implementation, ensuring a smooth experience. This level of support makes it easier for users to adopt and manage the e-signature solutions effectively.