That ranks them third among e-commerce sites, behind Amazon (14 per cent) and eBay (8.8 per cent).
The figures refer to the percentage of Internet users that interact with the respective sites - either directly, through third-party sites or back-end infrastructure - at least once in a 24-hour period, according to DeepField.
The results were released on Cyber Monday, which is billed as one of the most important days of the year for Internet retailers, and are based on Internet backbone traffic over the past several months.
Shopify’s platform allows users to quickly create online stores and says it has more than 30,000 customers.
DeepField says Shopify’s high ranking is a testament to the importance of small businesses in the e-retail sector.