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Finance Invoicing Billing E-Signature Freelance PDF Generator Quote Management

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Last Updated: 08-21-2026 09:09 AM (UTC)

Invoicerr

Invoicerr nails the exact billing sequence freelancers actually use: draft a quote, send it to the client, collect a legally-binding electronic signature via a secure browser link, convert the approved quote into an invoice, and generate a branded PDF — no DocuSign account, no external signing service, no enterprise complexity. The React frontend with NestJS backend uses Prisma ORM with your choice of SQLite for instant local setup or PostgreSQL for production workloads. Quotes and invoices are first-class objects with independent status tracking — unread, sent, viewed, signed for quotes; paid for invoices — not a single form with a label swap. The e-signature system generates secure-token signing links that clients open in their browser to review and sign documents without needing any account or external service. PDF generation renders quotes, invoices, and receipts with your company logo, name, VAT number, colors, and custom email templates so documents reflect your brand identity rather than the software's defaults. Authentication supports JWT tokens or OIDC providers stored in cookies. The REST API backend enables future integrations with mobile and desktop clients. A plugin system with community-made features and outgoing webhooks extends functionality without forking core code. International-friendly with customizable currencies. Deploy with Docker Compose using the prebuilt image from GitHub Container Registry. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Invoicerr
Invoicerr
Invoicerr
Invoicerr
Invoicerr

Benefits

  • Complete Quote-to-Invoice Workflow
  • Draft quotes, deliver to clients for signature via secure token links, convert signed quotes into invoices with one click, and track payment status through independent lifecycle stages.
  • Built-In E-Signature Collection
  • Clients review and sign quotes directly in their browser using secure-token signing links without needing external e-signature services like DocuSign or any account creation.
  • Professional Branded Documents
  • Generate clean PDF quotes, invoices, and receipts styled with your company logo, name, VAT number, custom colors, and branded email templates via configurable SMTP delivery.
  • Extensible Plugin Architecture
  • Extend functionality through a documented REST API, community-made plugin system, and outgoing webhooks for integrating with external services without modifying core code.

Features

  • Quote Signing System
  • Secure-token browser-based signing workflow lets clients review and sign quotes without account creation, replacing external e-signature services entirely.
  • PDF Generation
  • Render clean PDF documents for quotes, invoices, and receipts with customizable company branding including logo, VAT number, and color schemes.
  • Client Management
  • Store and organize client contact details with complete quote and invoice history, status tracking across unread, sent, viewed, signed, and paid stages.
  • Flexible Authentication
  • Support JWT token-based authentication or OpenID Connect providers with cookie storage for secure session management across the React frontend.
  • Docker Deployment
  • Deploy via Docker Compose with prebuilt images from GitHub Container Registry using SQLite for quick local setup or PostgreSQL for production workloads.