It's no secret that tech stocks have been volatile over the past year, with the tech-heavy Nasdaq Composite essentially flat over the past year. And while the roller-coaster ride has been understandably unnerving for investors, there are still some great tech segments that investors should consider. 

One of them is e-commerce, which is poised to become a $7 trillion market by 2025, according to eMarketer. Three companies already thriving in this space right now are Shopify (NYSE: SHOP), (NASDAQ: MELI), and Amazon (NASDAQ: AMZN). Here's why investors should consider scooping up shares of these e-commerce leaders. 

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Source Fool.com