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Invoice Ninja

Open-source invoicing and billing platform

Budgeting & Finance ★ 10k stars Medium setup Elastic-2.0

Invoice Ninja is a free, open-source platform for invoicing, billing, payments, and time tracking. It serves freelancers and small businesses with quotes, recurring invoices, and client portals.

Key features

  • Invoices, quotes, and payments
  • Client self-service portal
  • Time and expense tracking
  • Recurring billing automation

Pros & cons

Strengths

  • Comprehensive billing features
  • Many payment gateway integrations

Trade-offs

  • License not OSI-approved
  • Setup can be involved

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