Cloud startups continue to attract venture capital funding and the attention of the top cloud computing platform providers amid a digital transformation march that’s expected to push public cloud service revenue from $214.3 billion this year to $331.2 billion by 2022, according to research firm Gartner.

CRN rounded up some of the hottest cloud startups of the year so far; from a two-year-old open-source and enterprise software company that emerged from stealth mode in December, to a data analytics company about to be scooped up by Google for $2.6 billion, to a cloud-based workplace messaging company that had one of the most successful tech company debuts in public trading this year.

“CloudCheckr is a cloud management platform provider that specializes in cloud cost management, cloud security and compliance with one-dashboard management across Amazon Web Services, Google Cloud and Microsoft Azure. The company grew its revenue by more than 50 percent in the first quarter and plans to almost double its staff by the end of the year at its Rochester, N.Y., headquarters and offices in Seattle and London. In June, CloudCheckr added a new high-security environment for financial services, public sector, health care and other regulated industries that have stringent compliance requirements and want to use the cloud.”