Open Source Invoicing & Finance Apps

Local-first personal finance with envelope budgeting, end-to-end encryption, and multi-device sync — no subscription required.

Open-source online accounting for small businesses and freelancers — invoices, expenses, and reporting without monthly fees or vendor lock-in.

Self-hostable double-entry accounting platform with invoicing, inventory, multi-currency, and real-time financial reporting for small and medium businesses.

Self-hostable subscription management and billing platform with Stripe integration, tax automation, configurable workflows, and Twig-based document generation.

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.

100% free, open-source ERP unifying accounting, manufacturing, inventory, CRM, HR, and POS in a single self-hostable platform.

Lightweight self-hosted personal finance manager with AI receipt scanning, multi-currency support, and MCP integration for complete data privacy.

Bloomberg-grade financial data and AI-powered analysis through a conversational chat interface you can self-host.

Own your financial data with a self-hosted, privacy-first budgeting app that replaces Mint and YNAB.

Open-source Bloomberg alternative with AI agents and real-time market data

Offline desktop accounting with double-entry, POS, and custom invoice templates

Track your stocks, ETFs, and crypto with a privacy-first, self-hostable wealth management platform built for data-driven investors.

Self-hosted invoicing without the bloat

Self-hostable invoicing, time-tracking, and multi-gateway payment platform for freelancers and small businesses, with built-in e-invoicing compliance for EU and global standards.

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.

Open-source metering, billing, and revenue infrastructure for product-led companies that need complete control over their pricing stack.

The programmable open source core ledger for fintech — build money-moving applications with atomic multi-posting transactions, account-based modeling, and Numscript, a built-in DSL for financial logic.

Self-hostable personal finance app that gives you full ownership of your financial data with a clean, minimal Rails-powered interface.

All-in-one AI-powered business operations platform for freelancers and solo entrepreneurs to manage invoicing, time tracking, banking, and financial intelligence.

The AI Workspace for Finance: Connect Data, Run AI Agents, Build Analytics

Open-source metering and billing engine for AI, agentic, and DevTool monetization — ingest usage events in real time and turn them into accurate invoices automatically.

Open source payments infrastructure that turns software into a business — subscriptions, usage-based billing, digital products, and merchant-of-record compliance in one platform.

Free, cross-platform personal and business finance manager with multi-profile support, double-entry accounting, and full offline operation.

Modern open-source time tracker for freelancers and agencies with invoicing, multi-org support, and Toggl/Clockify migration built in.

Self-hosted, open source expense splitting with multi-currency, recurring bills, and bank imports — a complete Splitwise replacement you control.

Self-hosted personal subscription tracker with multi-currency support, household member management, and AI-powered savings recommendations.

Self-hosted personal finance app for long-term financial planning with AI-powered transaction parsing and investment tracking.