Container security startup Aqua raised $25 million in Series B funding. Aqua CEO Dror Davidoff called it the “largest funding round to date” in the container security space, and it brings total investments in Aqua to $38.5 million.

Lightspeed Venture Partners led the latest round, with existing investors Microsoft Ventures, TLV Ventures, and Shlomo Kramer also participating. Microsoft led the Series A round in September 2016, which secured $9 million.

The startup launched its container security platform in May 2016. It supports container stacks from Docker, Kubernetes, Mesos, CoreOS, Microsoft, Red Hat, and VMware, and tracks a container’s status throughout its lifecycle. It supports on-premises deployments as well as on Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform, and other public clouds.

Aqua will use the $25 million to continue investing in this infrastructure-agnostic approach, Davidoff said. “One of our value propositions is secure once, deploy anywhere. The flip side is that we need to heavily invest in platform support to make sure our product can run anywhere — in the different cloud stacks, or the different orchestrators.”

The funding will also allow the company to further advance its product and ensure it can scale as needed. “We work with the largest Docker deployments out there, the largest stacks, Fortune 500 companies that already have big deployments,” Davidoff said.

The container security platform has “dozens” of Global 1000 customers, including two of the 10 largest financial services company and three of the world’s top 10 software companies, according to Aqua.

In a blog post about the Series B round, Davidoff said containers are a security “game changer” because they enable security to be part of the stack, not an afterthought.

“Baking in security was always a desire for security practitioners,” he told SDxCentral. “And now with containers we can build in security from an early stage. Containers allow us to do the security work right at the gate when the developers are packing the code together.”

Aqua also monitors containers while they’re running, making sure their behavior stays within policy boundaries. Davidoff said this built-in security means “I have much more confidence in the code we are running.”