OpenSign vs Skribble
OpenSign
opensignlabs.com
Skribble
skribble.comSide by side
| Figure | OpenSign | Skribble |
|---|---|---|
| Price from | $9.99/mo | €23/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 5 | 6 |
| Spec score · E-Signature Software | 9.0 (#4) | 8.2 (#38) |
| Spec score · Digital Signature API Software | 9.0 (#2) | 8.2 (#15) |
| Spec score · Electronic Signature Software | 9.0 (#3) | 8.2 (#18) |
| Spec score · E-Signature APIs Software | 9.0 (#3) | 8.2 (#13) |
| Spec score · E-signature tools | 8.9 (#10) | 8.6 (#18) |
| API | OpenSign exposes a REST API authenticated with an x-api-token header and provides sandbox, production and EU endpoints. | Skribble offers an open REST API for custom integrations, with documentation and a demo account for testing. |
| API access | Yes | Yes |
| Audit trail | Yes | Yes |
| Bulk sending | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | The Professional plan lists Zapier integration, Dropbox import and custom Gmail or SMTP sending. | The integrations page lists Word, Excel, OneDrive, SharePoint Online, Google Drive, Power Automate, and Zapier, as well as industry solutions. |
| Product | OpenSign describes itself as an open-source PDF e-signature solution for signing, storing, and securing documents. | Skribble is digital signature software for signing documents online with simple, advanced, and qualified electronic signatures. |
| Security | The API documentation lists TLS-encrypted transport, audit trails, IP logging, and tamper-evident signed PDFs. | Skribble says it is GDPR compliant and ISO 27001 certified, conducts regular vulnerability scans and annual penetration tests, and retains audit logs for 10 years. |
| Support | The documentation directs users to contact OpenSign support at [email protected] for assistance. | Scale includes prioritized customer service and phone support; Team and Pro list a contact form, Help Center, and administrator guide. |
Plans
OpenSign
- FreeFree
- Professional$9.99 a month
- Teams$19.99 a month
- FreeFree
- EnterprisePriced on request
Skribble
- StarterFree
- Team€23 a month
- Team€276 a year
- Pro€36 a month
- Pro€432 a year
- ScalePriced on request
In their own words
OpenSign
OpenSign is an open-source PDF e-signature solution for signing, storing, and securing documents. Users can create reusable templates with pre-placed widgets and send them through the API to one or many signers. API workflows include self-signing, drafts, signer roles, public template links, and real-time webhook notifications. Templates can be embedded in React, Next.js, HTML, JavaScript, and Angular projects. The documentation lists TLS-encrypted transport, audit trails, IP logging, and tamper-evident signed PDFs; account protection includes two-factor authentication and passkey sign-in. The free plan costs nothing and lists unlimited digital signatures and templates, completion certificates, sequential signing, OpenSign Drive, and email notifications. Its free-plan guide limits invitation emails to 15 per month; bulk sending and public links require a paid plan. Live API tokens require Professional or Teams, though sandbox tokens are available on all plans. OpenSign provides Docker self-hosting instructions for Linux, macOS, and Windows. Some SMTP features are limited to paid plans.
Skribble
Skribble is digital signature software for signing documents online with simple, advanced and qualified electronic signatures. The company says its signatures meet EU eIDAS and Swiss ZertES requirements. People invited to sign can use a smartphone or computer without a Skribble account. The service includes an audit trail, bulk sending, identity verification and an open REST API for custom integrations. Team adds signing order, attachments, observers, signature protocols and reminders; Starter also supports signing order. Listed integrations include Word, Excel, OneDrive, SharePoint Online, Google Drive, Power Automate and Zapier. Skribble says it is GDPR compliant and ISO 27001 certified, retains audit logs for 10 years, and uses unique AES-256 keys for documents with TLS 1.2 or higher in transit. Its platform and associated data are hosted in Switzerland across two geo-redundant Tier IV data centres. The company was founded in 2018 and is headquartered in Zurich. Starter is free with per-signature charges: SES €1, AES €3 and QES €5. Team is €23 a month and Pro is €36 a month; both show differing annual totals on the pricing page. A 14-day trial includes Pro features and unlimited users without requiring a credit card.