Future Bets

By Rachel Miller

5. Tesco
The No. 1 brick-and-mortar grocery and general merchandise retailer in the U.K., equivalent to Super Target or Wal-Mart in the U.S., Tesco has an enormous built-in customer base that it's transferring online. The Tesco marketplace has accelerated significantly since launching in 2012, and now competes with top U.K. marketplaces like Amazon, eBay and Rakuten's Play.com.  Tesco offers a variety of products, including baby and toddler, home and garden, sports and leisure, toys, clothing, and jewelry.