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10 Best GitHub Repos for Finance & Invoicing in 2025

The top open-source finance & invoicing projects on GitHub. Actively maintained, well-documented, and ready to self-host.

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10 Best GitHub Repos for Finance & Invoicing in 2025


GitHub hosts thousands of open-source projects, but finding the best ones for finance takes hours of research. We've done the work for you — here are the top projects worth deploying on your own server.


Why Self-Host GitHub Projects?


Open-source software gives you the code, but running it requires infrastructure. Self-hosting means:


  • **Full data ownership** — your data never leaves your server
  • **No SaaS fees** — pay only for the server ($5/month on TinyPod)
  • **Unlimited users** — no per-seat pricing
  • **Customization** — modify configs, themes, and integrations freely

    • 1. InvoiceNinja


    InvoiceNinja is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "InvoiceNinja" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    2. Firefly III


    Firefly III is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "Firefly III" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    3. Actual Budget


    Actual Budget is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "Actual Budget" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    4. ERPNext


    ERPNext is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "ERPNext" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    5. Odoo


    Odoo is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "Odoo" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    6. Crater


    Crater is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "Crater" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    7. GnuCash


    GnuCash is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "GnuCash" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    8. BTCPay Server


    BTCPay Server is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "BTCPay Server" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    9. LNBits


    LNBits is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "LNBits" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    10. FOSSBilling


    FOSSBilling is one of the most popular open-source finance projects on GitHub. It's actively maintained, well-documented, and can be self-hosted on your own infrastructure.


    **Why developers love it:**

  • Active community with frequent releases
  • Clean API and extensive documentation
  • Self-hostable with Docker or one-click on TinyPod
  • Privacy-focused alternative to commercial tools

    • **Deploy it:** Search for "FOSSBilling" on TinyPod and deploy in 60 seconds with automatic SSL and daily backups.


    How to Deploy These Projects


    The fastest way to deploy any of these projects:


    1. Sign up at tinypod.app (free 3-day trial)

    2. Search for the app in the catalog

    3. Click Deploy — live in 60 seconds with HTTPS

    4. Configure your custom domain (optional)


    Each TinyPod server includes 4 CPU cores, 8GB RAM, and 75GB NVMe storage — enough to run multiple apps simultaneously.


    Conclusion


    These finance projects represent the best of open-source software. Self-hosting them gives you the privacy, control, and cost savings that SaaS alternatives can't match. With TinyPod, deployment takes 60 seconds — try any of them free for 3 days.