GitLab, the startup pushing the open-source GitLab source code repository software and maintaining a website with an online version of the software, is announcing today a $20 million round of new funding. August Capital led the round; existing investors Khosla Ventures and Y Combinator also participated.

GitLab is viewed as, among other things, an open-source version of GitHub, or Atlassian’s Bitbucket. It’s not as large or as popular as GitHub, but it’s been picking up buzz, and business, as well. GitLab customers now include IBM, Macy’s, NASA, and VMware, according to a statement. More than 100,000 organizations are using GitLab in on-premises data centers, the statement said.

GitLab had 93 employees in July, when I last spoke with Sid Sijbrandij, cofounder and chief executive of the startup. That’s up from nine in March 2015.

Since then, GitLab has added several features — including Issue Boards, for tracking issues — and has incorporated the Koding cloud-based integrated development environment (IDE) into its online service.

GitLab was founded in 2014. Its employees are spread out geographically, although the startup does have a San Francisco office.

To date, GitLab has raised $25.6 million, including the $4 million round announced a year ago.

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