Open Source ERP: accounting, CRM and more

LedgerSMB is an acronym for Ledger Small Medium Business,
often abbreviated as LSMB.

More than 83 000 downloads since 2006


The LedgerSMB project brings ERP/accounting software to small and midsize businesses.


  • Sales
  • Purchasing
  • General ledger
  • Inventory management
  • Flexible framework to support Rapid Application Development for custom extensions
  • and more

The fact that LedgerSMB is open source - meaning that the source code is freely available - makes it even more customizable and flexible.

Quality standards

The project holds high quality standards that should be expected from business software regarding these topics in particular:

  • Security
  • Performance
  • Software quality
  • Useability
  • Accessibility


We achieve this goal by:

  • Stimulating a vibrant, open community centered around:
  • Keeping a strong focus on efficiency and effectiveness through:
    • use of proven technology
    • re-use of existing solutions
    • code and design pattern re-use within the code base
    • real world use cases - introducing real solutions


Some features currently under development and/or planned for future releases of LedgerSMB:

  • UI improvements (modern design, including mobile browser support)
  • Platform and language neutral APIs (XML and database stored procedures)
  • More authentication options
  • LDAP customer/staff support
  • More logic in the database with more constraints
  • Improvements on the data structure


LedgerSMB began in 2006 as a fork of the popular general ledger software package called SQL-Ledger largely written and maintained by Dieter Simader since 1999. Versions 1.2 and earlier are largely based on SQL-Ledger's code. As of 1.3 our codebase is quickly moving away from what we inherited. Some of the improvements that we've made to the code base so far include:

  • Enhanced security
  • Better Windows support
  • More reports
  • Better data integrity controls
  • Major size reduction while growing functionality

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