Best Free eSignature APIs

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Compare the Top Free eSignature APIs as of September 2026

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What are Free eSignature APIs?

eSignature APIs are software interfaces that allow developers to integrate electronic signature capabilities directly into applications, websites, or workflows. They enable users to sign documents digitally without printing, scanning, or physically handling paperwork. These APIs support legally binding signatures and often comply with global regulations such as eIDAS, ESIGN, and UETA. Developers can automate document workflows, request signatures, track status, and store signed files programmatically. eSignature APIs are widely used in industries like finance, healthcare, legal, and HR to streamline approvals and reduce turnaround time. Overall, they help businesses digitize document processes, improve efficiency, and enhance user experience. Compare and read user reviews of the best Free eSignature APIs currently available using the table below. This list is updated regularly.

  • 1
    Foxit eSign

    Foxit eSign

    Foxit Software

    Foxit eSign is a secure, web-based, legally binding, HIPAA-compliant e-signature solution designed for organizations of all sizes. Easy to use and deploy, it enables businesses to create documents, send them for e-signatures, and securely archive them. Foxit eSign also offers robust API integrations and collaboration tools that allow teams across multiple locations to work seamlessly on the same contract or document. While many eSignature solutions focus only on signing, Foxit eSign integrates with Foxit Document Management System (DMS) to provide a connected workflow for signing, storing, organizing, and managing documents from start to finish.
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    18 Ratings
    Starting Price: $8.00/user/month
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  • 2
    OneSpan Sign
    OneSpan Sign is a secure and reliable electronic signature solution that powers some of the world's most trusted brands. Top analyst firms and regulated industries recognize OneSpan Sign as a flexible and scalable solution that enables them to manage identities, secure access, verify transactions, and protect assets across the enterprise, financial, e-commerce, government, and healthcare markets. Available in the cloud or on-premises, OneSpan Sign seamlessly captures signatures at the point of sale (POS), in the field, or on websites.
    2 Ratings
    Starting Price: $20.00/month/user
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