A TypeScript-first digital document signing platform with multi-signer workflows, full audit trails, PDF manipulation, and self-hosted deployment for data-sensitive organizations.
SignFlow is a TypeScript-first digital document signing platform — a transparent, auditable alternative to DocuSign built on the philosophy that the world deserves to know how document signing works. Multi-signer workflows, comprehensive audit trails, email notifications, PDF annotation, and customizable signing experiences are all available in a self-hostable platform that deploys to Railway, Render, or Koyeb in under an hour.
DocuSign charges $45–65 per user per month. For legal teams, HR departments, and operations teams sending thousands of contracts, NDAs, and compliance documents, that’s $50,000–$500,000 annually for signing infrastructure. More critically, in financial services, healthcare, and legal industries where document confidentiality is a compliance requirement, sending sensitive contracts through a third-party SaaS platform creates a data residency problem that on-premise or self-hosted solutions must solve. Every NDA, employment contract, and client agreement that transits DocuSign infrastructure is outside the firm’s data control.
SignFlow is a TypeScript monorepo built for both self-hosting and SaaS deployment. The Next.js App Router frontend handles the signing experience and document management dashboard. Prisma ORM and PostgreSQL manage the document store and audit trail with full event history. PDF-Lib handles server-side document manipulation — placing signature fields, applying signed annotations, and generating final signed documents. tRPC provides end-to-end type-safe APIs between frontend and backend. Stripe handles subscription billing for organizations that prefer the managed cloud option. For regulated industries, the self-hosted path means documents never leave the organization’s infrastructure, with a full audit trail logging every view, signature, and rejection.
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