Social network Pinterest and videoconferencing company zoom went public on Thursday. Zoom reported revenue in its latest fiscal year of $330.5 million, while Pinterest generated sales of $755.9 million. Despite being less than half the size, Zoom is being given a higher valuation because it's growing faster and is profitable. Zoom had net income for the year of $7.6 million. Here's what experts say to look for in both stocks now.