Four months after e-commerce platform provider MarketLive Inc. and order fulfillment software firm Shopatron merged to form Kibo, MarketLive founder Ken Burke has left the company.

A Kibo spokeswoman on Tuesday confirmed Burke’s departure, saying, “Ken Burke remained with the team through the acquisition working extensively on the integration and transition of the companies and is now departing to embark on more personal projects and adventures.”

When the MarketLive-Shopatron merger was announced in January, Burke said he planned to stay  until the end of this year. He could not be reached for comment.

MarketLive and Shopatron were acquired by private equity firm Vista Equity Partners in December for an undisclosed price. In January, the two companies were merged with mobile point-of-sale vendor Fiverun, which Vista also acquired in December, to form Kibo.

Burke is a pioneer in e-commerce, having started MarketLive under the name Multimedia Live in 1995 with $500 in startup money. His aim was to serve catalogers making the transition to online, as well as the new category of web-only merchants.

According to Top500Guide.com, MarketLive is the e-commerce platform provider for six retailers in the Internet Retailer 2016 Top 500 Guide, including weight loss products retailer BeachBody LLC (No. 155), omnichannel party supplies retailer Party City Corp. (No. 225) and luxury apparel manufacturer A/X Armani Exchange (No. 372).