KEY POINTS
  • The online backup and data storage company beat analysts' expectations on Thursday's first-quarter earnings report.
  • CEO and co-founder Drew Houston said revenue is up 28 percent.
  • Paid subscribers also increased by about 500,000.

Working with competitors has helped Dropbox grow, said Drew Houston, co-founder and CEO of the company.

"Some of our larger competitors have become partners," Houston told Deirdre Bosa on "Closing Bell" Thursday. He listed partnerships with Microsoft, Google and Salesforce.