Legalesign API
E-signature APIs software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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What is Legalesign API
Legalesign API is an e-signature API that lets software teams embed legally binding electronic signing into their own applications and workflows. It supports sending documents for signature, managing signers and signing order, and retrieving signed files and audit evidence via API. Typical users include product teams, developers, and operations teams that need to automate contract execution inside internal systems or customer-facing portals. The product is positioned around API-driven signing and integration into existing business processes rather than a standalone signing-only user interface.
API-first embedded signing
The product is designed to be consumed programmatically, which fits teams that need e-signature as a feature inside another application. Common tasks such as creating signature requests, tracking status, and retrieving completed documents are handled through API endpoints. This reduces manual steps compared with email-only signing flows and supports higher-volume, repeatable processes.
Audit trail and evidence
E-signature workflows typically require proof of who signed, when, and what was signed, and the API supports capturing and returning signing evidence. This helps organizations meet internal compliance requirements and respond to disputes. Having evidence accessible via API also makes it easier to store records in a document management system or case file automatically.
Workflow automation integration
The API approach supports integration with CRMs, HR systems, procurement tools, and custom line-of-business applications. Teams can trigger signature requests from business events (e.g., deal stage changes, onboarding steps) and update downstream systems when signing completes. This aligns with common enterprise needs for end-to-end process automation rather than isolated document sending.
Developer dependency for rollout
Because the core value is delivered through an API, organizations typically need engineering effort to implement, test, and maintain integrations. This can slow adoption for teams that want a ready-to-use signing tool with minimal configuration. Ongoing changes to templates, workflows, or authentication may also require developer involvement.
UI and admin depth varies
API-centric products often provide a lighter out-of-the-box admin console than platforms that focus on end-user document preparation and complex routing. If a buyer needs extensive no-code template building, advanced conditional workflows, or rich recipient experiences without custom work, they may need additional development or complementary tooling. The fit depends on how much of the experience must be managed outside the host application.
Ecosystem and integrations scope
Compared with larger e-signature platforms, the breadth of prebuilt integrations, partner ecosystem, and third-party extensions may be more limited. This can increase implementation time when connecting to less common systems or when standardized connectors are required by IT. Buyers should validate available SDKs, webhooks, and supported authentication patterns for their stack.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Pay As You Go | £1.50 per sent-document | Occasional use; no subscription required; includes Advanced Electronic Signature and Forms. |
| Solo Basic | £10/month (ex VAT) | 1 user; 100 documents/month; 10 templates; Advanced eSignature & Forms. |
| Solo Pro | £25/month (ex VAT) | 1 user; 500 documents/month; unlimited templates; Advanced & Qualified Electronic Signature; Forms; Witnessing & Approvers; Automated reminders; SMS Signer Verification; Branding; 100 Bulk Send/month. |
| Team | £20/user/month (ex VAT) | 2–20 users; 1000 documents/month; unlimited templates; Advanced & Qualified Electronic Signature; Forms; Witnessing & Approvers; SMS Signer Verification; Branding; 500 Bulk Send/month; Users & Permissions. |
| Enterprise & API | Contact us (custom pricing) | API & Webhooks; monthly fee + sent-document credit model for API (document credit bundles with discounts); GDPR & compliance, SSO, SLA, implementation management; high-volume / per-doc or per-user pricing. |
Notes: Prices shown on the vendor site are listed ex VAT. The API offering uses a monthly fee plus purchased sent-document credits (discounted for larger bundles) — see API pricing page for details; new customers are asked to contact sales.
