E-Sign review
A sandboxed signing API for teams that can use E-Sign’s Enterprise plan.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
E-Sign combines an electronic signature platform with a REST API for applications that need to create, send and manage signature envelopes. Developers can upload documents, create envelopes, manage users, track signing progress and receive updates through webhooks. A separate sandbox supports API testing, while iframe-based embedded signing enables signing within another application. It is aimed at organisations from small teams to enterprises that want to incorporate signatures into document workflows.
API access is an Enterprise-plan feature, and the plan includes bulk sending, annual envelope limits and unlimited users. According to the published pricing information, Enterprise pricing is custom and based on envelope volumes. E-Sign also offers a 14-day free trial, but there is no free plan. Teams evaluating the API should account for the Enterprise requirement and contact-sales pricing; the listed Personal, Standard and Business rates apply to platform plans and do not include API access.
The integration list spans Microsoft, Salesforce, HubSpot, SharePoint, Dropbox, Google and Microsoft Power Automate. OAuth2 delegated authorization and webhooks for envelope-created, completed, signed and declined events support integration workflows, while chat, phone, ticket and documentation are listed support channels. E-Sign lists ISO 27001, GDPR and SSO/SAML, and is available on web and through a browser extension as well as its API. Choose it if embedded signing, a sandbox and those integrations fit your workflow and Enterprise terms work for your organization; consider alternatives if API access outside Enterprise or a free plan is essential.
E-Sign pros and cons
- Where it wins
- Separate sandbox environment for API testing
- Embedded signing via iframe, with OAuth2 authorization
- Webhooks track created, completed, signed and declined envelopes
- Where it doesn't
- API access is included with the Enterprise plan
- Enterprise pricing is custom and based on envelope volumes
- No free plan
E-Sign fact sheet, pricing and score →
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