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Invoice Simple alternatives · Accounting

Open-source alternatives to Invoice Simple

Invoice Simple is not described as open source on its own site. 7 of the 128 other accounting and invoicing tools in this directory are open source, according to their own sites.

Invoice Simple is a paid product with a free trial, starting at $6.99 per month, as listed in the US App Store. All of them are free or have a free plan.

7 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from Invoice Simple

  1. InvoiceShelf

    Open-source invoicing and expense tracking you host yourself

    • InvoiceShelf is free. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • InvoiceShelf has a free plan. Invoice Simple does not, though it has a free trial.
    • Only Invoice Simple lists iOS and Android apps.
    • InvoiceShelf is open source and self-hostable, according to its own site.
    InvoiceShelf pricing and details

  2. LedgerSMB

    Open-source double-entry accounting and ERP you install yourself

    • LedgerSMB is free. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • LedgerSMB has a free plan. Invoice Simple does not, though it has a free trial.
    • Only Invoice Simple lists iOS and Android apps.
    • LedgerSMB is open source and self-hostable, according to its own site.
    LedgerSMB pricing and details

  3. Akaunting

    Open-source accounting you can host yourself or use in the cloud

    • Akaunting starts at $72 per year, self-hosted. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • Akaunting has a free plan. Invoice Simple does not, though it has a free trial.
    • Only Invoice Simple lists iOS and Android apps.
    • Akaunting is open source and self-hostable, according to its own site.
    Akaunting pricing and details

  4. Odoo

    Business app suite whose Accounting app is free when used on its own

    • Odoo starts at $31.10 per user / month, billed annually, after $24.90 for the first 12 months. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • Odoo has a free plan. Invoice Simple does not, though it has a free trial.
    • Odoo is open source and self-hostable, according to its own site.
    • Odoo also covers bookkeeping and expense tracking.
    Odoo pricing and details

  5. GnuCash

    Free double-entry accounting for home and small business use

    • GnuCash is free. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • GnuCash has a free plan. Invoice Simple does not, though it has a free trial.
    • Only GnuCash lists Windows, macOS and Linux apps.
    • Only Invoice Simple lists a web app.
    GnuCash pricing and details

  6. Bigcapital

    Open-source accounting you host yourself, with a cloud version planned

    • Bigcapital is free. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • Bigcapital has a free plan. Invoice Simple does not, though it has a free trial.
    • Only Invoice Simple lists iOS and Android apps.
    • Bigcapital is open source and self-hostable, according to its own site.
    Bigcapital pricing and details

  7. InvoicePlane

    Free self-hosted invoicing for quotes, invoices and payments

    • InvoicePlane is free. Invoice Simple starts at $6.99 per month, as listed in the US App Store.
    • InvoicePlane has a free plan. Invoice Simple does not, though it has a free trial.
    • Only Invoice Simple lists iOS and Android apps.
    • InvoicePlane is open source and self-hostable, according to its own site.
    InvoicePlane pricing and details

Common questions

Is there an open-source alternative to Invoice Simple?

Yes. InvoiceShelf, LedgerSMB, Akaunting, Odoo, GnuCash, Bigcapital and InvoicePlane are open source, according to their own sites.

Is Invoice Simple open source?

Invoice Simple is not described as open source on its own site. The listing was checked on Nov 13, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 17, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Invoice Simple: the alternatives its listing names first, then the tools that share the most features with it.