Open Source VMware Alternatives

OpenStack is one of the most widely deployed cloud computing platforms in the world. It gives organizations full control over their infrastructure, running on-premises, in public cloud environments, or at the edge. Thousands of organizations run it in production, managing over 40 million cores globally across dozens of industries.

At its core, OpenStack pools compute, storage, and networking resources and exposes them through APIs or a web dashboard. You get standard infrastructure-as-a-service capabilities, plus additional components for orchestration, fault management, and service management to keep applications highly available.

What OpenStack supports:

• Virtual machines, bare metal, and containers - not locked into a single workload type
• Large-scale deployments - Walmart runs over 170,000 cores across 30+ regions on OpenStack
• Telecom-grade infrastructure - China Mobile built its NFV network on OpenStack with 50,000+ servers
• Autoscaling - Blizzard Entertainment uses it to handle variable load for live online games
• Apache 2.0 license - fully open source, no vendor lock-in

OpenStack is a genuine alternative to proprietary cloud platforms like Microsoft Azure when you need to own your infrastructure entirely. It's the right fit for enterprises, telecoms, and service providers that need scale, flexibility, and the ability to run everything on their own hardware.

Storage can be paired with Ceph for distributed block and object storage, and teams working with container-native workloads often combine OpenStack with Kubernetes for orchestration. For infrastructure-as-code workflows, tools like OpenTofu integrate naturally with OpenStack APIs.

The project is backed by the OpenInfra Foundation and has a large, active contributor community. There is a consistent release cadence that keeps the platform current.

Transform bare metal servers into a complete cloud platform with a simple REST API for deploying Kubernetes clusters, databases-as-a-service, virtual machines, load balancers, and HTTP caching services. Build your own cost-effective cloud infrastructure or development environments.

Key advantages:

• API-first approach - Built on Kubernetes with standard interfaces, avoiding vendor lock-in
• Easy installation - Bootstrap using PXE or ISO methods with immutable OS for consistency
• Native Kubernetes integration - Use declarative YAML manifests with RESTful API
• High performance, low overhead - Efficient resource allocation with unique tenant model
• Built-in monitoring - Pre-configured dashboards and alerts for every service instance
• Extensible platform - Modify or expand using familiar Kubernetes primitives and FluxCD

Perfect for:

• Organizations wanting to build private clouds
• Development teams needing cost-effective environments
• Companies seeking alternatives to expensive cloud providers
• Teams requiring standardized, open-source infrastructure solutions

The platform emphasizes standardization and collaboration, using proven open-source tools and contributing improvements back to upstream projects rather than creating proprietary solutions.

Superphenix turns your own hardware into a complete cloud platform. It covers virtualization, networking, storage and managed services, all operated from a console or through GitOps. It started inside a cloud service provider that was leaving a proprietary stack, and it's aimed at teams that want sovereign infrastructure without VMware-style lock-in.

Kubernetes sits underneath as the control plane, so one API manages compute, storage and network. VMs run next to containers in the same network domains and are managed declaratively.

• Hypervisor: VMs, live migration, snapshots and node autoscaling
• Storage: block, file and S3 storage with replication and disaster recovery
• Software-defined network: VPCs, NAT gateways, BGP, load balancing, QoS and firewalling
• PaaS: Kubernetes as a Service for tenant clusters, with managed databases coming soon
• GitOps and observability: install, upgrade and provision through declarative pipelines, with metrics, logs, traces and health signals across layers

Two deployment topologies are supported. Hyperconverged shares compute and storage nodes, which suits single-AZ setups and proof of concepts. Decoupled separates storage and virtualization so each scales on its own, which fits performance-focused and multi-AZ deployments. A management cluster outside the workload zones can run several AZs from one neutral control plane.

The project is open, auditable and self-hostable by default. Rayshift offers optional enterprise support, including advanced multi-tenancy, IAM, SLA-backed support and migration paths from VMware and other legacy virtualization stacks.