Open-source alternatives to Kyverno

Kubescape is a security platform for Kubernetes that provides tools for scanning clusters, configurations, and container images against industry compliance and security benchmarks. It functions as a suite of security utilities, including a compliance auditor, a misconfiguration scanner, and a container vulnerability scanner. The project differentiates itself through automated remediation and active enforcement. It can automatically patch operating system vulnerabilities in images and fix security errors within manifest files. It also utilizes an admission controller to block the deployment of

Datree is a policy enforcement framework for Kubernetes that validates configurations against rules written in Rego, JSON Schema, or CEL. It operates as both a command-line tool for pre-deployment scanning and as a cluster-side admission webhook for real-time enforcement, integrating with CI/CD pipelines and continuous delivery tools like ArgoCD and FluxCD. The framework supports namespace-scoped policy mapping, allowing different policies to apply to different namespaces, and provides a skip annotation mechanism for selectively bypassing rules on individual resources or entire namespaces. It

Kubescape is a Kubernetes security posture management platform designed to scan clusters, manifests, and images for misconfigurations, vulnerabilities, and compliance risks. It functions as a comprehensive security suite incorporating a compliance scanner, a container image vulnerability scanner, an admission controller for policy enforcement, and a runtime security monitor. The platform distinguishes itself through runtime-aware vulnerability filtering, which maps libraries loaded in memory to determine if vulnerabilities are actually reachable. It also integrates with AI assistants via a Mo

Teleport is a zero-trust access platform designed to provide secure, identity-based connectivity to servers, databases, and Kubernetes clusters. It functions as a centralized gateway that replaces static credentials with short-lived, identity-bound cryptographic certificates, effectively eliminating the need for traditional VPNs and long-term secret exposure. The platform distinguishes itself by orchestrating access through a unified control plane that maps external identity provider claims to granular, role-based infrastructure permissions. It enforces security through mutual TLS gateways an

Cerbos is an open-source authorization service that provides a centralized, language-agnostic engine for managing access control. It functions as a policy-as-code platform, allowing teams to define, test, and distribute authorization rules using declarative YAML or JSON configurations. By decoupling access logic from application code, it enables consistent permission enforcement across diverse service stacks. The project distinguishes itself through its ability to translate high-level authorization policies into native database query filters. This capability allows applications to enforce sec

Nomad is a distributed workload orchestrator and infrastructure automation platform designed to manage the lifecycle of applications across large-scale, heterogeneous environments. It functions as a multi-cloud orchestration engine, providing a unified control plane to deploy, scale, and govern containers, virtual machines, and legacy applications. By utilizing declarative job specifications, the system ensures infrastructure convergence and maintains the desired state across distributed data centers and geographic regions. The platform distinguishes itself through a flexible, plugin-based ar

This project provides a framework for managing multi-agent systems, designed to automate complex software development, infrastructure, and business workflows. It functions as a multi-agent workflow orchestrator that routes tasks to domain-specific workers while maintaining state persistence and infrastructure automation. By leveraging large language models, the system decomposes high-level objectives into actionable plans, ensuring that complex operations are executed with consistency and reliability. The framework distinguishes itself through its hierarchical agent registry and policy-driven

Casbin is an authorization library that provides a model-based engine for enforcing access control across diverse application environments. It decouples authorization logic from application code by using a configuration-driven approach, allowing developers to define access rules and evaluation logic independently. The system supports a wide range of access control models, including role-based, attribute-based, and relationship-based patterns, which are evaluated at runtime to determine if a subject is permitted to perform an action on a resource. The project distinguishes itself through a hig

The AWS Cloud Development Kit is an infrastructure-as-code framework that enables developers to define and provision cloud resources using familiar programming languages. By utilizing construct-based synthesis, it translates high-level, object-oriented code into declarative templates, allowing for the automated management of complex cloud environments through a centralized, code-driven control plane. The framework distinguishes itself through its ability to model infrastructure as a dependency-aware resource graph, ensuring that components are provisioned and updated in the correct order. It

Kubebuilder is a framework and set of scaffolding tools used to build Kubernetes APIs and controllers. It functions as an operator framework that provides generators for custom resource definitions, admission webhooks, and RBAC manifests to extend cluster functionality. The project distinguishes itself through marker-based code generation, which parses source code comments to automatically produce Kubernetes manifests and boilerplate logic. It employs a hub-and-spoke versioning model to translate data between multiple API versions and uses a three-way merge strategy to automate project migrat

Pulumi is an infrastructure-as-code framework that enables the definition, deployment, and management of cloud resources using general-purpose programming languages. It functions as a cloud resource orchestrator that coordinates the lifecycle of heterogeneous infrastructure by executing code to construct dependency graphs and reconciling the desired state against actual cloud environments. The platform distinguishes itself through a language-host runtime bridge that allows developers to use standard programming languages to define infrastructure, rather than relying solely on domain-specific

Talos is a minimal, immutable Linux distribution designed specifically for deploying and managing Kubernetes clusters. It functions as an API-driven infrastructure manager that replaces traditional shell access with a declarative gRPC interface to control operating system state and configuration. The system is distinguished by its use of a read-only root filesystem and a security-hardened kernel, which removes standard GNU utilities to reduce the attack surface. It ensures environment consistency by distributing the operating system as versioned, signed images and utilizes TPM-backed verified

Crossplane is a Kubernetes-based control plane framework that functions as a cloud resource orchestrator and infrastructure-as-code platform. It enables the management of heterogeneous infrastructure by extending the Kubernetes API to provision and maintain external cloud services through declarative configuration. By utilizing custom resource controllers, it continuously reconciles the state of external infrastructure with defined desired states, ensuring consistent deployment and lifecycle management across multiple cloud providers. The platform distinguishes itself through its composition-

Cilium is a networking, security, and observability platform for containerized environments that leverages kernel-level data paths to process traffic. By executing programs directly within the Linux kernel, it provides high-performance packet filtering, routing, and load balancing without the need for traditional user-space proxies or context switching. The platform distinguishes itself through identity-based security enforcement, which filters traffic based on service labels rather than volatile IP addresses. It integrates containerized workloads with external physical or virtual infrastruct

This project is a comprehensive backend framework built on NestJS, designed to accelerate the development of multi-tenant software-as-a-service applications. It provides a production-ready foundation that integrates essential infrastructure, including user authentication, subscription billing, and team management, into a modular, decorator-based architecture. The framework distinguishes itself by offering a complete suite of SaaS-specific orchestration tools, such as a built-in billing engine for managing recurring revenue and a multi-tenant database partitioning system. It also includes a ro

The CNCF Curriculum is an open-source repository that organizes exam domains and learning paths for CNCF certification courses covering Kubernetes and cloud-native technologies. It structures certification content into weighted domains that reflect exam question distribution, providing a structured study guide for candidates preparing for CNCF certifications. The curriculum is organized around multiple cloud-native domains including networking, security, GitOps, platform engineering, and certification preparation. It teaches cloud-native concepts through the lens of building and operating int

kube-bench is a Kubernetes security benchmark scanner and configuration auditor. It verifies if a cluster adheres to the Center for Internet Security standards and other hardening guides to identify security misconfigurations and vulnerabilities. The tool operates as a containerized security scanner, utilizing host namespaces to analyze nodes and control plane components without requiring the installation of binaries directly on the host. It supports multiple Kubernetes distributions, applying environment-specific benchmarks to ensure auditing accuracy for managed services. The project cover

Cosign is a tool for signing and verifying software artifacts, primarily those stored in OCI-compatible registries such as container images, Helm charts, SBOMs, and Tekton bundles. It supports keyless signing using ephemeral keys and short-lived certificates from the Sigstore public-good infrastructure, associating signatures with an OpenID Connect identity rather than a long-lived cryptographic key. The project provides multiple signing and verification methods, including private keys, key pairs stored in KMS providers like AWS KMS and Azure Key Vault, and hardware security keys. It can sign

cert-manager is a Kubernetes TLS certificate manager and cluster add-on that automates the issuance and renewal of TLS certificates. It functions as a certificate lifecycle automator, managing certificates as native Kubernetes resources to secure internal and external network traffic. The project includes an ACME protocol client to automate certificate requests and validations from providers. It utilizes a controller to synchronize the desired state of certificates with responses from various certificate authorities. The system covers certificate provisioning from external issuers and vault

Prowler is an automated cloud infrastructure security scanner and posture management tool. It evaluates cloud environments and infrastructure-as-code templates against security benchmarks to identify misconfigurations, vulnerabilities, and compliance gaps that could compromise system integrity. The platform distinguishes itself through graph-based attack path analysis, which identifies chains of misconfigurations that create exploitable routes for unauthorized access. It utilizes a plugin-based execution model to perform state-based assessments of live environments and static analysis of conf

Strimzi is a Kubernetes operator that automates the deployment, management, and lifecycle of Apache Kafka clusters on Kubernetes or OpenShift. It uses custom resource definitions and declarative YAML configuration to define Kafka cluster topology, broker placement, and security settings, with operator-based controllers that reconcile the desired state with the actual cluster state. The operator handles rolling updates during cluster upgrades or configuration changes to maintain availability and data integrity, and supports rack-aware broker scheduling across Kubernetes nodes and availability

Kitematic is a graphical user interface for managing and running Docker containers on desktop operating systems. It serves as a visual Docker management tool and API client that translates user interface interactions into REST API calls to control the Docker daemon without requiring the command line. The application is built as a cross-platform Electron desktop application, utilizing a Chromium-based shell to provide a consistent administrative interface across Mac and Windows. The software covers the full container lifecycle, including the creation, configuration, and monitoring of containe

jx is a GitOps delivery platform and Kubernetes CI/CD orchestrator designed to automate the building and deployment of applications. It functions as a cloud native pipeline manager that executes container-based build and deployment sequences using a catalog of reusable tasks. The project distinguishes itself through the automated orchestration of preview environments, which are created and destroyed based on pull request activity to enable validation before merging. It employs a GitOps-based state synchronization model to maintain the desired state of clusters by polling git repositories and

Bearer is a static analysis security testing tool and privacy compliance auditor. It identifies security vulnerabilities, hard-coded secrets, and privacy risks in source code through static analysis and data flow tracing. The tool distinguishes itself by tracking the movement of sensitive data through code to identify leaks and by mapping personal and health-related information flows to generate evidence for privacy impact assessments. It also provides differential scanning for pull requests and uses fingerprint-based suppression to exclude known false positives from reports. The platform co

Kube-hunter is a security scanner and vulnerability hunter for Kubernetes clusters. It operates as a cloud-native penetration tool designed to identify security weaknesses, infrastructure misconfigurations, and exploitable gaps by simulating attacker techniques. The tool distinguishes itself through a dual-mode scanning engine that executes both remote external probes and internal network scans. It features identity-based impersonation, allowing it to use service account tokens and pod identities to simulate security access from specific cluster roles and determine the potential blast radius

This project is a Kubernetes controller that automates the issuance, renewal, and lifecycle management of TLS certificates. It functions as a native extension to the cluster API, using custom resource definitions and reconciliation loops to maintain the desired state of certificates and trust bundles across distributed services. By integrating directly with the cluster's admission control and secret storage systems, it ensures that cryptographic identities are consistently provisioned and available for application workloads. The project distinguishes itself through its extensive support for a

VictoriaMetrics is a high-performance, scalable time series database and observability platform designed for long-term storage and analysis of metric, log, and trace data. It functions as a unified backend for monitoring ecosystems, offering full compatibility with industry-standard protocols and query languages. The system is built to handle massive data volumes through a distributed architecture that supports horizontal scaling and efficient data lifecycle management. The platform distinguishes itself through a storage engine that utilizes consistent hashing for data sharding and log-struct