Marc Lore, CEO of new e-commerce site Jet, and his team. (Shin Woong-jae/For the Washington Post)

The July launch of was perhaps the most highly-anticipated debut on the retail scene this year. The new e-commerce site, founded by veteran Marc Lore, is among the most well-funded start-ups in history and has a real-time pricing model that is unlike that of any other retailer.

A little more than a month after Jet began selling to the masses, software provider ChannelAdvisor has released data that offers some clues about what kind of traction the retailer has gotten so far.

“Their momentum out the gate is strong,” said David Spitz, ChannelAdvisor’s chief executive.

ChannelAdvisor studied the transactions that took place since July on its software platform, which is used by many retailers and brands to facilitate selling on online marketplaces including Amazon, eBay and Jet. ChannelAdvisor’s analysis found that, in its first month of selling, Jet already surpassed marketplaces such as Sears, Best Buy, Newegg and Rakuten, in terms of “gross merchandise value,” industry-speak for the total value of products sold. (Keep in mind this is just an analysis of merchandise sold in a third-party marketplace format, so, in the case of Sears and Best Buy, it does not include items purchased on those sites that are fulfilled directly by Sears or Best Buy.)

ChannelAdvisor also found that Jet is having early success in building customer loyalty:  Since its debut, Jet has had a 23 percent repeat buyer rate, better than the 17 percent seen at eBay and the 11 percent seen at Amazon during the same time period. (Amazon’s chief executive, Jeffrey P. Bezos, owns The Washington Post.)

But Jet’s success doesn’t just depend on its ability to convince customers to pay its $50 annual membership and to shop the site regularly. Crucial to Jet’s future is whether it is able to keep growing the roster of merchants that sell on its marketplace. Without a huge network of sellers, the site will never have the wide selection of its rival, Amazon. Here, too, ChannelAdvisor’s findings are encouraging news for Jet: The average gross merchandise volume of a Jet seller since launch was double that of a seller on Sears or Newegg. Spitz said that kind of data point might make the case to merchants that it is a smart business move to play ball with Jet.

ChannelAdvisor said it doesn’t see any evidence that Jet is stealing business away from Amazon or eBay. For example, customers who purchased from Jet as well as from either Amazon or eBay did not slow down their purchase rate at the more established sites once Jet came on the scene. But it’s difficult to say whether this is bad news for Jet. On one hand, it might suggest that Jet is not convincing the online shopping faithful to give their site a try. And yet, Lore has long insisted that poaching Amazon Prime customers was never essential to his model. Lore has said that he believes that Amazon’s $99 Prime membership inherently appeals to a different shopper than Jet does, because Prime buys you access to speed, while Jet theoretically buys you access to lower prices. Plus, Lore has said, with only about 7 percent of retail sales occurring online, there’s plenty of opportunity for Jet to build business simply by getting more people to shop online, not by convincing the ones who already do to switch to Jet. So, if Lore’s right, it may not be such a big deal that shoppers aren’t trading Amazon for Jet.

“This seems to be early evidence that there is a segment of customers that hasn’t been well-addressed by the existing marketplaces,” Spitz said. 

ChannelAdvisor’s analysis only includes transactions with sellers who use its software, so it does not include orders that are filled directly by Jet or by third-party sellers who don’t use ChannelAdvisor. So it is not a complete view of how Jet compares with its rivals.

Still, the data help illuminate what kind of start Jet has had as it has entered the retail fray. There were early signs that Jet may have gotten off on the wrong foot with some established retailers, an inauspicious development for a company that hopes to get big-name brands to sell on its marketplace. Many were irked by the Jet Anywhere program, which gives customers rewards they can use on Jet when they shop at, say, Anthropologie or Nike. Dozens asked that they be removed from the list of brands that earn a shopper Jet Anywhere rewards.

And the shopping experience so far seems to be uneven. In an experiment for The Washington Post, I placed the same order at Jet, Amazon and Wal-Mart and found that Jet was the clear winner on price, but it struggled mightily to get my packages to me in a timely fashion. Meanwhile, social media chatter about shopping Jet is all over the map: Some customers declare they’ve been seduced by the low prices, cheery marketing, solid customer service or some combination of those factors. But there are also plenty of complaints about slow delivery and botched orders. These two contrasting tweets neatly sum up the range of conversation:

It remains to be seen whether Jet can work out these kinks and attract more customers, but Spitz is optimistic about the upstart’s future.

“If you look at how rapidly they have become one of our top marketplaces,” Spitz said, “to me it indicates that they’re driving a lot of consumer awareness and that the differentiation that they’ve been able to create around pricing has clearly struck a chord.”