eSign.AI vs Signater
eSign.AI
esign.aiSignater
signater.comSide by side
| Figure | eSign.AI | Signater |
|---|---|---|
| Price from | $24.90/mo | $1.92/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 8 |
| Spec score · Digital Transaction Management Software | 8.9 (#4) | 8.2 (#22) |
| API | The company says its native API can embed contract execution into workflows, and its FAQ says AI agents can orchestrate signing workflows via natural language or API. | The REST Integration API can create, send and track envelopes, upload documents, use templates and retrieve signed files and certificates. |
| Headquarters | The about page identifies Hong Kong as the international headquarters and gives the operator as ESIGN HK HOLDING LIMITED. | Miami, Florida, United States; Barueri, São Paulo, Brazil |
| Signature standards | The company says it supports SES, AES, and QES signature standards and complies with e-signature regulations across 100+ countries and regions. | Signed PDFs use embedded PAdES signatures, SHA hashes, RFC 3161 timestamps and optional long-term validation. |
| Support | The site provides a service center, user manual, FAQ, ticket portal, and support email address. | Signater directs customers to get answers about features, plans and implementation through WhatsApp, and Enterprise includes priority chat support. |
Plans
eSign.AI
- Basic$24.90 a month
- ProfessionalPriced on request
- AdvancedPriced on request
Signater
- FreeFree
- Starter$23 a year
- Business$47 a year
- Enterprise$299 a year
- FreeFree
- Starter$39 a month
- Business$79 a month
- Enterprise$499 a month
In their own words
Signater
Signater is a digital contract service that lets businesses send, sign and track agreements through a browser. An envelope can gather several documents and signers into a sequential or parallel process, ending with a completion certificate. Signers can be checked using passwords, email or SMS codes, selfies with liveness checks, identity documents, facial biometrics or geolocation. Reusable templates hold standard text, with fields for variable details and a new version for each edit. The REST API can create and track envelopes, send them, upload documents, use templates, and retrieve signed files and certificates; API and webhook access is limited to Business and Enterprise plans. Webhooks send envelope events by POST and retry automatically. Signater lists HTTPS/TLS, HSTS and AES-256 encryption among its security measures, and signed PDFs can include embedded PAdES signatures, hashes and timestamps. Signers open links on phones or computers without an account or app. The platform and signing flow support six languages. A free plan includes three envelopes monthly; paid plans start at $39/mo.