Open Source Invoicing & Finance Apps
Discover the top open source Invoicing & Finance software to manage billing, expenses, payments, and accounting. Take control of your finances!
Apps in Invoicing & Finance
Kimai
Invoicing Finance · Project Management
Professional open-source time tracking with invoicing, multi-user support, SAML/LDAP auth, and a full REST API—self-host it or use the cloud.
Ghostfolio
Invoicing Finance
Track your stocks, ETFs, and crypto with a privacy-first, self-hostable wealth management platform built for data-driven investors.
Bigcapital
Invoicing Finance
Self-hostable double-entry accounting platform with invoicing, inventory, multi-currency, and real-time financial reporting for small and medium businesses.
Lago
Ecommerce · Invoicing Finance
Open-source metering, billing, and revenue infrastructure for product-led companies that need complete control over their pricing stack.
Frappe Books
Invoicing Finance
Offline desktop accounting with double-entry, POS, and custom invoice templates
solidtime
Invoicing Finance · Productivity
Modern open-source time tracker for freelancers and agencies with invoicing, multi-org support, and Toggl/Clockify migration built in.
Crater
Invoicing Finance
Open source invoicing and billing platform for freelancers and small businesses — create estimates, track expenses, accept Stripe payments, and run recurring invoices from your own server.
Midday
Invoicing Finance · Productivity
All-in-one AI-powered business operations platform for freelancers and solo entrepreneurs to manage invoicing, time tracking, banking, and financial intelligence.
Maybe
Authentication · Databases · Invoicing Finance
Self-hostable personal finance app that gives you full ownership of your financial data with a clean, minimal Rails-powered interface.
About Invoicing & Finance
Managing finances effectively is crucial for any individual or organization. Open source Invoicing & Finance software provides a range of tools to streamline these processes, offering control and transparency over monetary operations. These solutions often include features like invoice creation, expense tracking, payment processing, and financial reporting.
The functionality within this category is diverse. Common capabilities include:
- Invoice Generation: Creating professional invoices with customizable templates and branding.
- Expense Management: Tracking business expenses, categorizing costs, and generating expense reports.
- Payment Processing: Integrating with payment gateways to accept online payments securely.
- Financial Reporting: Generating key financial statements like profit and loss statements, balance sheets, and cash flow reports.
- Budgeting: Tools for creating and managing budgets to control spending.
- Tax Calculation & Reporting: Automating tax calculations and preparing reports for filing purposes.
The value proposition of open source Invoicing & Finance software is significant. Users gain greater control over their data, reduce reliance on proprietary systems, and avoid vendor lock-in. These applications are often customizable to fit specific business needs and can integrate with other open source tools for a comprehensive solution. They empower teams to automate repetitive tasks, improve accuracy in financial records, and ultimately make better informed business decisions. Businesses can also reduce operational costs by leveraging self-hosted solutions and community support.