Compiere (pronounced KOM-pyeh-reh, "to accomplish, complete, fulfill" in Italian) is an open-source ERP and CRM business solution for Small and Medium-sized Enterprises (SME) in distribution, retail, service, and manufacturing. Compiere is distributed by Consona Corporation and through a Partner Network, who are a collection of trained and authorized business partners.

Compiere was founded in 1999 by Jorg Janke and was among the top 10 projects in SourceForge from 2002 for 4 years, reaching one million downloads and 100 partners in 2006.

In 2006, Compiere, Inc. raised venture capital from New Enterprise Associates with the goal of transforming the successful open-source ERP project into a growing and sustainable commercial open-source business. In 2007, the company added new executives, revamped engineering and support processes, and expanded its sales and services channels. The Compiere product line expanded to include Professional, Enterprise, and Cloud Editions while the company continued to maintain the open-source foundation as Community Edition.

Like many commercial ventures built around open-source projects, there was a degree of contention between company management (who sought to monetize the investments in R&D, Services and Support) and voices from the community (who desired that Compiere source code and business processes remained free and open as Adempiere at that moment and iDempiere some years later). On June 16, 2010, Consona acquired Compiere, Inc. Terms of the deal were not disclosed .

The application and source code are provided based on the GNU General Public License version 2; this comprises the Community Edition. Also available for a fee is a Professional Edition with more features, a commercial license, documentation and support contracts.

Compiere encompasses ERP functionality, but in order to avoid the duplication of information and fulfill the need for synchronization, it was organized in a different way. Compiere modules are: Quote to Cash, Requisition-to-Pay, Customer relationship management, Partner Relations Management, Supply Chain Management, Performance Analysis, Warehouse, Double-entry bookkeeping, Work-flow-Management and Web Store. A manufacturing module is being developed within an independent project CMPCS (see external links section).

Compiere is a Model Driven Architecture development, deployment and maintenance framework designed with the intention of following changes as business evolves. At any time, customers can change the information structure, adjusting to new information needs. Compiere provides multiple views of business information based on the detail of the actual transactions. This structure allows flexibility and integration of supplemental external information. And since information is presented as views (using Compiere's MVC architecture), they can be changed to meet the needs of the business. Compiere is entirely based on the concept of Active Data Dictionary (ADD). Compiere Data Dictionary contains definitions of a data entity (type, validation, etc.), how it is displayed (label on screens and reports, help, display sequence and position relative to other fields), and the display rules. It also contains security and access rules.

Compiere has been developed with Java EE.