OpenSign vs Upsign

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.

Upsign is electronic signature software for sending, signing, and tracking documents. Senders can set signer and approver order, monitor signing status, send reminders, send documents in bulk, and create reusable templates. Recipients can view, approve, sign, and complete documents from a phone or computer without creating an account; guided steps are intended to help people who are not technical. An audit trail records document history, including views and signatures. A searchable library offers free legal contracts and forms to download or send for signature. Upsign is available on Android, iOS, and the web. Personal allows one user, Team allows up to five, and Business lists unlimited users; all three include unlimited documents. Business also lists user groups, approval workflows, signing groups, bulk signing, and dedicated integration support. Business and Enterprise are described as options for organizations needing integrations, but no specific integrations are named. The plans list a free plan and a 30-day trial. Personal costs $12 a month, Team $24 a month, and Business $45 a month, all billed monthly.