Best eSignature APIs for Close

SignWell is a secure electronic signature and document workflow platform trusted by tens of thousands of businesses worldwide. We help teams sign documents online, automate approvals, and reduce paperwork with legally binding eSignatures, SOC 2 Type II compliance, and support for GDPR, HIPAA, and NOM-151 requirements. With an easy-to-use interface, a powerful eSignature API, and best-in-class customer support included on every plan, SignWell makes it simple to sign PDFs, manage agreements, and move business forward—without the enterprise price tag. For developers and technical teams, SignWell's REST API makes it straightforward to embed eSignature workflows directly into your applications, handling document sending, signer authentication, status webhooks, and completed document retrieval without building signing infrastructure from scratch. If you've ever tried to roll your own document signing flow, you know how quickly certificate management, audit trails, and compliance requirements turn a "simple feature" into a months-long project. SignWell handles that layer so your team doesn't have to. On the compliance side, SOC 2 Type II certification means SignWell's security controls have been independently audited — not just self-attested. GDPR, HIPAA, and NOM-151 support make it viable for teams operating across jurisdictions where data-handling requirements are non-negotiable, including healthcare, legal, and finance verticals. For non-developer users, the interface is built to minimize friction: reusable templates, bulk send for high-volume agreements, automated reminders, and in-person signing support cover most real-world document workflows without requiring any configuration overhead.

GetAccept is an all-in-one solution for e-signature, contract management, proposal creation, sales collateral management, document tracking and prospecting. Used by sales, HR, customer success and development teams; personal video messaging, live chat and analytics are popular features. Our Digital Sales Room has two powerful parts: a Deal Room (from first meeting to proposal) and a Contract Room (from proposal to signed deal). Deal Room: Boost your win rates by making collaboration between buyers and sellers easier – in one shared space. Upload sales collateral, create mutual action plans, and chat with your buyers in real time. Contract Room: Empower sales reps to become top performers and create stunning proposals in minutes. Start from scratch with our in-app editor, or use smart templates for interactive, branded contracts. With a comprehensive suite of features designed to increase win rates, GetAccept stands at the forefront of the digital sales transformation.