Magento is an open-source e-commerce platform written in PHP. Magento source code is distributed under the Open Software License. Magento was acquired by Adobe Inc in May 2018 for $1.68 billion.

More than 150,000 online stores have been created on the platform. The platform code has been downloaded more than 2.5 million times, and $155 billion worth of goods were sold through Magento-based systems in 2019. As of April 2021, Magento holds a 2.32% market share in global e-commerce platforms.

Roy Rubin, the former CEO of Varien, sold a share of the company to eBay, which eventually completely acquired and then sold the company to Permira in 2015; Permira later sold it to Adobe.

Magento began development in early 2007. It was originally developed by Varien Inc., a U.S.-based private company headquartered in Culver City, California, with contributions from volunteers and open-source developers. The first public beta version was released on August 31, 2007.

Varien had previously worked with osCommerce and initially considered forking it, but ultimately chose to create Magento from scratch. The first general-availability release of Magento was published on March 31, 2008.

In its early years, Magento won several awards, including the Best of Open Source Software Awards and the SourceForge Community Choice Awards.

In February 2011, eBay announced that it had acquired a 49% stake in Magento in 2010. On June 6, 2011, eBay revealed it would acquire the remaining shares and integrate Magento into its X.Commerce initiative. Magento co-founder Roy Rubin stated the platform would continue operating from Los Angeles under his and Yoav Kutner's leadership.

Yoav Kutner left Magento in April 2012, stating that changes in leadership had shifted the company’s original vision post-acquisition.