Best Free Block Storage Solutions of 2025

QuantaStor, a unified Software Defined Storage platform, is designed to scale up and down to simplify storage management and reduce overall storage costs. QuantaStor storage grids can be configured to support complex workflows that span datacenters and sites. QuantaStor's storage technology includes a built-in Federated Management System that allows QuantaStor servers and clients to be combined to make management and automation easier via CLI and RESTAPIs. QuantaStor's layered architecture gives solution engineers unprecedented flexibility and allows them to design applications that maximize workload performance and fault tolerance for a wide variety of storage workloads. QuantaStor provides end-to-end security coverage that allows multi-layer data protection for cloud and enterprise storage deployments.

Google Cloud Platform (GCP) delivers exceptional block storage solutions through its Google Cloud Persistent Disks, which are designed for high performance and reliability for virtual machine instances. Users can select from various disk types, including standard HDD and SSD, to meet diverse workload requirements. New users have the opportunity to utilize $300 in complimentary credits to experiment with, test, and deploy workloads, enabling them to investigate the capabilities of block storage and evaluate how GCP's persistent disks can cater to their individual needs. Additionally, Persistent Disks come equipped with features such as snapshots and automatic replication, enhancing data security and recovery strategies. Businesses benefit from the ability to attach these disks to any virtual machine, offering the flexibility to adjust storage solutions as their applications grow. These persistent storage options are seamlessly integrated with GCP's computing services, guaranteeing quick and dependable data accessibility.

Microsoft Azure serves as a versatile cloud computing platform that facilitates swift and secure development, testing, and management of applications. With Azure, you can innovate purposefully, transforming your concepts into actionable solutions through access to over 100 services that enable you to build, deploy, and manage applications in various environments—be it in the cloud, on-premises, or at the edge—utilizing your preferred tools and frameworks. The continuous advancements from Microsoft empower your current development needs while also aligning with your future product aspirations. Committed to open-source principles and accommodating all programming languages and frameworks, Azure allows you the freedom to build in your desired manner and deploy wherever it suits you best. Whether you're operating on-premises, in the cloud, or at the edge, Azure is ready to adapt to your current setup. Additionally, it offers services tailored for hybrid cloud environments, enabling seamless integration and management. Security is a foundational aspect, reinforced by a team of experts and proactive compliance measures that are trusted by enterprises, governments, and startups alike. Ultimately, Azure represents a reliable cloud solution, backed by impressive performance metrics that validate its trustworthiness. This platform not only meets your needs today but also equips you for the evolving challenges of tomorrow.

Simplyblock provides a distributed storage solution for IO-intensive and latency-sensitive container workloads in the cloud, offering an alternative to Elastic Block Storage services. The storage solution enables thin provisioning, encryption, compression, storage virtualization, and more.

DRBD® (Distributed Replicated Block Device) is an open source, software-centric solution for block storage replication on Linux, engineered to provide high-performance and high-availability (HA) data services by synchronously or asynchronously mirroring local block devices between nodes in real-time. As a virtual block-device driver deeply integrated into the Linux kernel, DRBD guarantees optimal local read performance while facilitating efficient write-through replication to peer devices. The user-space tools, including drbdadm, drbdsetup, and drbdmeta, support declarative configuration, metadata management, and overall administration across different installations. Initially designed to support two-node HA clusters, DRBD 9.x has evolved to accommodate multi-node replication and seamlessly integrate into software-defined storage (SDS) systems like LINSTOR, which enhances its applicability in cloud-native frameworks. This evolution reflects the growing demand for robust data management solutions in increasingly complex environments.

Experience enterprise-level storage solutions tailored to the locations of your applications. Cloud Volumes ONTAP allows you to maximize the efficiency of your cloud storage expenditures and operational performance, all while improving data safety, security, and regulatory adherence. With Cloud Volumes ONTAP, you can effortlessly estimate your storage expenses on platforms like AWS, Azure, or Google Cloud by utilizing a straightforward, user-friendly calculator that is completely free to use. This tool is designed to help you make informed decisions about your cloud storage needs.