Slack (NYSE: WORK) is putting its rivalry with Microsoft (NASDAQ: MSFT) aside, announcing its working to integrate its digital chat and collaboration tool with Microsoft's Teams. During a conference call with Wall Street firm RBC, Slack co-founder, and CEO Stewart Butterfield said Slack is developing voice technology to integrate with Teams, CNBC reports. Once it's completed, Slack users will be able to make calls directly to Teams users without leaving the platform. IMAGE SOURCE: GETTY IMAGES. Butterfield didn't say when the integration would be ready, but it does highlight how important digital collaboration tools and video conferencing are becoming. as millions of people work-at-home amid the COVID-19 pandemic. That's been driving huge demand for Slack, Teams, and Zoom Video Communications (NASDAQ: ZM), the video conferencing start-up. Since the end of January, Microsoft's Teams has seen a 500% increase in usage in China alone. Demand is surging in the U.S. as well. Microsoft said last week that Teams has more than 44 million daily users, with it growing by about 12 million users in just seven days. Slack hasn't said how many users it's gained since the pandemic started but the company did say it's seeing unprecedented demand. 10 stocks we like better than MicrosoftWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Microsoft wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of March 18, 2020 Teresa Kersten, an employee of LinkedIn, a Microsoft subsidiary, is a member of The Motley Fool's board of directors. Donna Fuscaldo has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Microsoft, Slack Technologies, and Zoom Video Communications and recommends the following options: long January 2021 $85 calls on Microsoft, short January 2021 $115 calls on Microsoft, and short May 2020 $120 calls on Zoom Video Communications. The Motley Fool has a disclosure policy.Source