Applications networking company F5 has acquiring Threat Stack, a Boston-based cloud security and compliance startup.

The deal, which comes months after F5 bought multi-cloud management startup Volterra for $500 million,to bolster its cloud security portfolio as applications become a growing focus for cybercriminals.Threat Stack takes a more proactive approach, alerting organizations to all known vulnerabilities and providing a report on the holes that need to be plugged.

Applications are the backbone of today’s modern businesses, and protecting them is mission-critical for our customers. Threat Stack brings technology and talent that will strengthen F5’s security capabilities and further our adaptive applications vision with broader cloud observability and actionable security insights for customers.

F5 Statement

The startup’s intrusion detection platform, the Threat Stack Cloud Security Platform, works across cloud, hybrid cloud, multi-cloud, and containerized environments, and is perhaps best known for its Slack integration that alerts DevOps teams to security concerns in real-time.

F5 says that integrating its application and API protection solutions with Threat Stack’s cloud security capabilities and expertise will enhance visibility across application infrastructure and workloads, making it easier for customers to adopt consistent security in any cloud.