KnowledgeTree, Inc. is a U.S. company, based in Raleigh, North Carolina, that originally provided a commercial open-source document management software as late as 2011,  but has since focused their business on providing online, or "cloud-based" software that helps companies manage the documents used in the sales & marketing process. They promote their software as helping "sales and marketing teams discover, manage, and refine the collateral they use in sales engagements". The company also has an office in Cape Town, South Africa.
The company's product, also called KnowledgeTree, makes use of the Amazon EC2 cloud computing platform and Salesforce.com's Force.com platform. KnowledgeTree’s features — including content discovery, reporting, and editing — are designed to support B2B sales situations that depend on collateral and documents. The service is available on a subscription basis.
There had been a free and open source community edition hosted on sourceforge that was written in PHP and used the Apache Web Server and the application itself. By the fourth quarter of 2012, KnowledgeTree was no longer open source in any meaningful sense. The project page on sourceforge was removed and the community page was redirected to a page advertising the trial of the commercial edition. This was an example of the 'SaaS loophole' exploit being used to circumvent the original open source licensing of Knowledgetree. The loophole allows a commercial company to exploit the Intellectual Property Rights of an open source project whilst avoiding the obligation to contribute anything back to the original development community because they offer the functionality as a hosted service rather than the code as a product.
KnowledgeTree's discovery tools surface relevant content to users in the leads, opportunities, accounts, and other objects in Salesforce.com based on the sales situation.