The serverless security library targets the runtime environment but is not a replacement for an enterprise-grade platform deployment.
The container-focused vendor has now hauled in more than $63 million in funding.
The company's CEO said the firm was not looking just yet at a Series B, but that reception to its platform sped up the process.
A recent Gartner report found that more than 20 percent of global enterprises will have deployed serverless technologies by 2020, compared with less than 5 percent today.
Both firms continue to tout their broader cloud security platforms as superior to more focused efforts or those from large cloud providers.
Company notes complexity remains the enemy of security.
Containers are not inherently unsecure, but they are often deployed in an unsecure manner.
IBM security veteran Brendan Hannigan joined the Twistlock board.
Fortinet, vArmour, and Twistlock give 'intent' some RSA air time.