OpenText Corporation (also written opentext) is a Canadian company that develops and sells enterprise information management (EIM) software.

OpenText, headquartered in Waterloo, Ontario, Canada, is Canada's largest software company as of 2014 and recognized as one of Canada's Top 100 Employers 2016 by Mediacorp Canada Inc.

OpenText software applications manage content or unstructured data for large companies, government agencies, and professional service firms. OpenText aims its products at addressing information management requirements, including management of large volumes of content, compliance with regulatory requirements, and mobile and online experience management.

OpenText employs over 10,000 people worldwide and is a publicly traded company, listed on the NASDAQ (OTEX) and the Toronto Stock Exchange (OTEX).

OpenText Corporation was founded in 1991 by University of Waterloo professors Frank Tompa, Timothy Bray, and Gaston Gonnet. It was a successor to OpenText Systems Inc., founded in 1989. The company was spun off from a University of Waterloo project that developed technology to index the Oxford English Dictionary.

Key people involved later include Tom Jenkins, who joined the company as COO in 1994. Tom Jenkins later became President and Chief Executive Officer, and has been Executive Chairman since 2013. John Shackleton served as President from 1998–2011, and as CEO from 2005 - 2011. Mark Barrenechea has been President and CEO of OpenText since 2012. Mark Barrenechea was named Canadian Business CEO of the year in 2015. From January 2016, Steve Murphy served as the President, however the position was made redundant in 2017 Q1.

OpenText is a supporter of the University of Waterloo Stratford Campus, contributing both funds and in-kind services to the school.

In August 2016, OpenText was recognised by the consulting firm PWC as being number 1 in their "Fastest Growing Cloud Companies" report

On September 12, 2016, OpenText, acquired Dell EMC's ECD division—which included Documentum, an enterprise content management suite—for $1.6B USD.

RedDot, founded in 1993, is a business unit of OpenText Corporation that the company refers to as the Web Solutions Group. The software assists in the management of content, with regulatory compliance and industry specific requirements.

Its core product, RedDot CMS is a Windows-based server application that provides Web content management in a multi-user environment. Complementary to the CMS or as a standalone product, LiveServer aggregates disparate document resources and serves them as Web pages.

Red dots on the authoring interface indicated sections of editable content for each web page, hence the name RedDot for the product. This feature was popular with customers and won awards in 2001 for its usability. By 2006 RedDot was one of the few WCM vendors that continued to develop their own content authoring interface. Most other WCM vendors had moved to open source alternatives, or had licensed an online rich-text editor from commercial vendors such as Ephox or Ektron. In response to customer attempts to work around the limitations of the RedDot editor by installing other editors RedDot developed an integration layer to support CKeditor and Ephox EditLive! as alternative editors. In 2009 RedDot (now the OpenText Web Solutions Group) made the Telerik RadEditor available alongside the existing RedDot editor for CMS 9.

The growth of OpenText has largely been through acquisitions. Notable acquisitions include: