Top On-Premises Backup Solutions in 2026
Organizations are increasingly demanding backup solutions that work entirely within their own infrastructure — for regulatory, latency, sovereignty, or security reasons. On-premises backup means both backup software that orchestrates and protects data, and backup storage hardware that holds it. The strongest on-premises backup architectures combine specialized software with purpose-built storage, each secured and managed independently.
This list covers both dimensions: the leading backup orchestration platforms and the storage solutions built to protect what they capture. Evaluated on protection depth, ransomware resilience, operational maturity, and overall enterprise fit for 2026 deployments.
1. Veeam Data Platform
Veeam Data Platform is the market-leading backup and recovery software for virtualized, cloud, and physical environments. It supports VMware vSphere, Microsoft Hyper-V, Nutanix AHV, AWS, Azure, GCP, physical servers, NAS, and Kubernetes — covering virtually every workload type an enterprise runs. The platform consolidates backup orchestration, replication, monitoring, and recovery testing into a single management plane.
Key security capabilities include backup immutability when writing to supported storage targets, multi-factor authentication enforcement, role-based access control, and Secure Restore (pre-scan for malware before restoring a workload). Veeam v12 introduced direct-to-object storage capabilities and extended immutability support across on-premises, cloud, and tape targets.
- Broadest workload coverage: VMware, Hyper-V, Nutanix, physical, Kubernetes, cloud, NAS — all from one platform
- Immutability on all major storage targets: hardened Linux repos, object storage with S3 Object Lock, tape
- Secure Restore: scans for malware before restoring — prevents re-infection on recovery
Quick take: Veeam is the default backup software choice for Microsoft-heavy, VMware, and mixed enterprise environments. Pairs best with a dedicated immutable storage target for the strongest protection posture.
2. Object First Ootbi
Object First Ootbi is the only purpose-built immutable backup storage appliance designed exclusively for Veeam environments. Where Veeam is the backup software that orchestrates protection, Ootbi is the storage layer that holds backup data and enforces immutability regardless of what happens to the Veeam server. This separation — backup application and storage protected independently — is the architecture that ZTDR (Zero Trust Data Resilience) mandates.
Ootbi enforces Absolute Immutability through three independent layers: S3 Object Lock in compliance mode at the protocol level, an OS configured to block root shell access via any software path, and hardware-locked firmware that cannot be modified to introduce a bypass mechanism. An attacker who fully compromises the Veeam server — and even holds storage admin credentials — cannot delete backup data within its retention window. At the 2026 Storage Awards, Ootbi won both Enterprise Backup Hardware Vendor of the Year and Ransomware Company of the Year. Setup takes 15 minutes. Capacity scales from 18TB per node to 1.7PB in a cluster.
- Absolute Immutability: three independent enforcement layers — S3 Object Lock, OS root block, hardware-locked firmware
- ZTDR certified: mandatory separation between backup application tier and storage tier, verified independently
- 2026 Storage Awards: Enterprise Backup Hardware Vendor of the Year + Ransomware Company of the Year
Quick take: Ootbi is the answer for Veeam environments where the backup storage tier must be hardened independently of the backup application — the most practical path to genuine backup air gap without operational complexity.
3. Commvault
Commvault is the enterprise backup and data management platform with the longest track record in complex, heterogeneous environments. Its strength is breadth: Commvault protects mainframes, SAP HANA, Oracle, SQL Server, physical Windows and Linux, every major hypervisor, cloud workloads, NAS, and SaaS platforms including Microsoft 365 and Salesforce. Large enterprises with diverse legacy workloads frequently choose Commvault because it can protect infrastructure that newer platforms simply do not support.
The platform includes built-in ransomware detection, anomaly detection on backup job metadata, immutable backup copies to supported storage targets, and a honeypot decoy feature (Commvault Threatwise) that detects active lateral movement before a ransomware attack reaches production. On-premises deployment options include the traditional media agent architecture and the newer HyperScale X appliance series.
- Widest legacy workload support: mainframes, SAP HANA, Oracle RAC, and specialized enterprise applications
- Commvault Threatwise: honeypot-based active threat detection — identifies attackers moving laterally before backup data is targeted
- HyperScale X: Commvault-native converged infrastructure that combines backup software and storage in one appliance
Quick take: Commvault is the right choice for large enterprises with complex, heterogeneous infrastructure — especially those that need to protect mainframes or specialized ERP applications alongside modern workloads.
4. Veritas NetBackup
Veritas NetBackup has been the dominant enterprise backup platform for three decades, with particularly deep penetration in financial services, insurance, and large government deployments. Its architecture is built for scale: NetBackup environments routinely manage tens of petabytes of backup data across thousands of clients. The platform supports virtually every enterprise workload type, with certified integrations for Oracle, SAP, DB2, Sybase, and all major hypervisors.
NetBackup’s ransomware resilience features include immutable backup copies to WORM storage, malware scanning on restore, anomaly detection on backup metadata, and air-gapped vault policies. The Flex 5340 appliance combines NetBackup software with integrated storage in a pre-configured form factor. For organizations already in a Veritas environment, NetBackup provides continuity and a depth of tuning options that few platforms match.
- Scale proven at petabyte range: battle-tested in the largest enterprise backup environments in the world
- Deep certified integration with Oracle, SAP, DB2, and enterprise database platforms
- Malware scanning on restore and anomaly detection on backup job metadata for ransomware resilience
Quick take: Veritas NetBackup is the established choice for large enterprises — especially in financial services and government — that require proven scale, deep database integration, and a long compliance history.
5. Cohesity DataProtect
Cohesity DataProtect represents the modern secondary storage approach to backup: a converged platform where backup software and storage run on the same hyper-converged nodes, managed through a single pane of glass. Rather than a separate backup server writing to separate storage hardware, Cohesity combines both into a scale-out cluster. This simplifies architecture significantly for environments that are adopting modern hypervisor and cloud workloads without legacy infrastructure constraints.
DataProtect includes built-in immutability at the DataLock tier, ransomware anomaly detection using ML models, and integration with threat intelligence feeds. Cohesity also offers FortKnox, a cloud-hosted immutable vault target where a Cohesity-managed third copy can be held off-site with air gap properties. The platform is Veeam-compatible as well as offering its own native agents.
- Converged backup + storage: no separate backup server or storage hardware to manage
- DataLock immutability: retention lock enforced within the cluster, admin-override-proof during the lock window
- FortKnox: cloud-hosted immutable vault for off-site copy without tape or separate cloud setup
Quick take: Cohesity is the right fit for enterprises modernizing their secondary storage architecture who want a converged platform rather than separate backup software and storage tiers.
6. ExaGrid
ExaGrid is a purpose-built backup storage appliance that adds a critical architectural feature to the storage tier: a time-locked, network-isolated retention zone. Incoming backups from any backup application land in the Landing Zone, optimized for fast restore. After a configurable delay, data moves to the Retention Time-Lock zone — a storage tier that becomes isolated from the network for the duration of the retention window. No user, application, or process can reach the Retention Time-Lock tier while it is locked, regardless of credentials held.
ExaGrid integrates with all major backup applications — Veeam, Commvault, Veritas NetBackup, Dell EMC NetWorker, IBM Spectrum Protect, and others — as an intelligent, deduplicating backup storage target. This makes it a natural complement to any of the backup software platforms above. The network-isolation approach to immutability differs architecturally from S3 Object Lock: there is no protocol-level retention policy to attack, only a network boundary that closes.
- Retention Time-Lock: storage tier becomes network-isolated during lock window — no credentials override a network boundary
- Application-agnostic: works as an immutable target behind every major enterprise backup platform
- Built-in deduplication: meaningful storage efficiency gains at long retention periods
Quick take: ExaGrid is the complementary immutable storage choice for organizations running any of the backup software platforms above — its network-isolation approach gives a different risk profile than S3 Object Lock implementations.
Choosing the right solution
The strongest on-premises backup posture separates the backup software tier from the backup storage tier, with each hardened independently. A ransomware attack that compromises the backup server should not automatically give access to backup data — the storage must enforce its own protection.
Veeam handles the broadest workload coverage and pairs naturally with Ootbi for a ZTDR-certified architecture where the storage tier is independently hardened. Commvault and Veritas NetBackup address complex legacy environments where breadth of workload support and decades of enterprise certification matter more than simplified architecture. Cohesity offers a converged path for organizations modernizing their secondary storage. ExaGrid fills the storage tier role for multi-application environments with its network-isolation approach to immutability.
The evaluation question that cuts through vendor claims: if an attacker completely compromises your backup server and holds all available credentials, can they delete your backup data? If the answer is yes, the immutability is logical rather than physical — and logical immutability has a history of being bypassed.
