bifrost security vs Open Policy Agent Gatekeeper

Bifrost Security provides runtime security for containerised workloads, using observed behaviour to assess CVEs and generate workload-specific protections. Its agent monitors system calls, file access, signals, capabilities, and network ports at kernel level without requiring code changes. For each CVE, Bifrost reports whether it is reachable, mitigated by a security profile, or never loaded, and provides evidence for the verdict. The agent collects behavioural metadata only; Bifrost says it does not collect application data or personal information. The product can ingest CycloneDX and SPDX SBOMs and rescan them for CVEs across environments. It also creates default-deny AppArmor profiles from observed workload behaviour. Deployment is as a DaemonSet via Helm, with stated resource use below 200 MB RAM per node and below 1% performance impact. Bifrost supports Kubernetes, Docker Swarm, and Nomad workloads. A 14-day trial includes the full Pro edition and requires no credit card. Pricing is on request. The company is based in Stockholm, Sweden.

Open Policy Agent Gatekeeper is a free, open-source Kubernetes policy controller for Linux and self-hosted deployments. It runs as a validating and mutating webhook, enforcing CRD-based policies evaluated by Open Policy Agent. Validation constraints can deny requests, warn, run in dry-run mode or report violations without changing resources. Mutation policies can alter matching resources during admission before validation checks the final object. An audit function periodically evaluates existing cluster resources against constraints to identify pre-existing misconfigurations. The project includes an extensible policy library with parameterized examples, and provider connections to external data such as image registries and directory services. Named integrations or backed services include Azure Policy for Kubernetes, Google Kubernetes Engine Policy Controller, Rancher, AWS EKS Blueprints and Alibaba Cloud. Installation options include prebuilt, development or locally built images and Helm. Gatekeeper requires Kubernetes resources introduced in version 1.16 and cluster-admin permissions for installation. The gator CLI is documented as beta from version 3.11.