Azure Backup vs Site Recovery: restore the data, or move the whole workload
Two services live under the same "business continuity" umbrella, share a portal, and are constantly mixed up in interviews. But they answer completely different questions. One asks "how do I get my data back?" The other asks "how do I keep running when the whole site is gone?" Knowing which is which is the difference between a clean recovery and a very bad afternoon.
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Azure groups both under BCDR (business continuity and disaster recovery), and that shared label is exactly why people conflate them. Let us separate them by the question each one answers. Azure Backup keeps your data safe and restorable. Azure Site Recovery keeps your workloads running through an outage. Data recovery versus workload continuity. Everything else follows from that.
Azure Backup: point-in-time copies you can restore
Microsoft's definition is plain: Azure Backup provides "simple, secure, and cost-effective solutions to back up your data and recover it from the Microsoft Azure cloud." It takes recovery points, snapshots at points in time, of VMs, files and folders, Azure Files, blobs, managed disks, and databases like SQL Server and SAP HANA running in VMs, storing them in a Recovery Services vault. When something goes wrong, a file is deleted, a database is corrupted, ransomware encrypts a disk, or a bad deploy scrambles your data, you restore from a recovery point. Backup answers "give me back the good version of this data from before it broke." It is your time machine.
Azure Site Recovery: a warm copy of the whole workload, ready to take over
Site Recovery is a different beast. In Microsoft's words, it "helps ensure business continuity by keeping business apps and workloads running during outages," and it does so by replicating workloads from a primary site to a secondary location. It continuously mirrors your running machines — Azure VMs between regions, or on-premises servers into Azure — so that if the primary site goes down, you fail over to the secondary and keep serving, then fail back once the primary recovers. Site Recovery answers "the whole region/datacenter just died — bring my application up somewhere else, now." It is not a copy of your data to restore; it is a standby copy of your running workload to switch to.
Backup is a time machine for your data. Site Recovery is a spare engine that keeps the application running when the first one dies.
RPO and RTO: the numbers that separate them
Two terms make the distinction concrete. RPO (recovery point objective) is how much data you can afford to lose — how far back your last good copy is. RTO (recovery time objective) is how long you can afford to be down. Backup typically has a coarser RPO (recovery points taken daily, or a few times a day) and a slower RTO (a restore takes time to run), which is fine for "I lost some data, give it back." Site Recovery is built for tight numbers: it offers continuous replication with recovery points and can support failover measured in minutes, because the workload is already replicated and standing by. If your requirement is "we cannot lose more than a few seconds and must be back in minutes," that is a Site Recovery requirement, not a Backup one.
Someone deleted the wrong records / a table is corrupted / ransomware hit a disk. → Azure Backup. Restore the data from a clean recovery point. Site Recovery would have faithfully replicated the corruption to the secondary.
An entire Azure region or your on-prem datacenter went dark. → Azure Site Recovery. Fail the whole workload over to the secondary location and keep serving customers.
Both, honestly. Most serious estates run Backup for data recovery and Site Recovery for site-level DR, because they cover different failures. They are complementary, not either/or.
Why you usually need both
Here is the trap: Site Recovery is not a backup. Because it replicates continuously, a logical disaster — corruption, an accidental mass-delete, ransomware — gets mirrored to your secondary almost immediately. Fail over and you are now running the corrupted copy. Backup, with its history of discrete recovery points, is what lets you go back to before the corruption. Conversely, Backup alone will not keep you online through a regional outage — restoring everything from a vault into a new region is slow, and your RTO blows past what the business can stand. So the mature answer is layered: Backup for the "get my data back" failures, Site Recovery for the "the whole site is gone" failures. This pairs naturally with the reliability ideas in zones vs regions — zones and Site Recovery cover infrastructure outages, Backup covers data loss.
When a third-party platform is worth it
Once both native services are in place, the next question that arrives is whether to buy something on top — a platform like Rubrik, Veeam or Commvault. That comparison is usually framed as native versus better, and it is not. Azure Backup is a capable, secure product and Site Recovery handles regional failover. The honest framing is that native is the strong, cheap default, and a third-party platform is a deliberate upgrade you buy for specific reasons — reasons that are real for some estates and entirely absent in others.
| Azure Backup + Site Recovery | Third-party platform | |
|---|---|---|
| Scope | Azure workloads | Multi-cloud, on-premises and Azure |
| Control plane | Inside your Azure tenant | Outside the tenant, which is the isolation argument |
| Management | Per-vault, Azure-native | One console across all estates |
| Licensing | None beyond Azure usage | Product licensing, plus possible egress and appliance compute |
| Ransomware posture | Immutable vaults and soft delete | Immutable copies plus out-of-tenant recovery tooling |
| Best for | Azure-centric estates | Heterogeneous or high-assurance estates |
Three things genuinely earn the premium. Reach beyond Azure, if you have a real multi-cloud or on-premises footprint you would rather protect from one place than by stitching together each platform's native tool. Out-of-tenant isolation, because when the control plane and the copies live outside your Azure tenant, an attacker who compromises the tenant cannot also reach in and destroy the backups — that separation is a real ransomware-resilience argument, not marketing. And centralized policy and recovery: one set of service levels and one recovery workflow across everything, which matters most at scale.
Against that, native is the better call for an Azure-only estate, where a cross-cloud console solves a problem you do not have; where cost sensitivity matters, since native adds no licensing and keeps data in Azure rather than paying egress; and where native immutability is already enough, because immutable, soft-delete-protected Recovery Services vaults with tight RBAC cover a lot of the ransomware argument on their own.
Weigh the licensing plus any egress and appliance compute against the operational and isolation value, not the licence alone. And be honest about the isolation requirement: if out-of-tenant backup copies are a hard compliance or ransomware requirement, that alone can justify the spend. If they are not, immutable in-tenant vaults may already meet the bar.
Native backup is the strong default. A third-party platform is an upgrade you buy for isolation and reach — not a fix for a backup Azure does badly.
The takeaway
Azure Backup and Azure Site Recovery both live under BCDR, but they solve opposite problems. Backup stores point-in-time recovery points so you can restore data that was deleted, corrupted, or encrypted; think of it as a time machine. Site Recovery replicates whole running workloads to a secondary location so you can fail over when a site or region goes down, a standby engine ready to take the load. Because Site Recovery faithfully replicates corruption and Backup can't meet a minutes-long RTO for a whole region, serious estates run both. Keep the two jobs separate in your head, run one for the deleted-data days and the other for the dead-region days, and you will be reaching for the right tool while everyone around you is still arguing about which service they meant.
Questions people also ask
What is the difference between Azure Backup and Azure Site Recovery?
Backup takes point-in-time recovery points of your data so you can restore what was deleted, corrupted, or encrypted. Site Recovery replicates your entire running workload to a secondary location so you can fail over and keep serving when the primary site goes down. One restores data, the other moves the workload.
Can Azure Backup be used for disaster recovery?
Not on its own for site-level disaster recovery. Backup can restore a VM or database into a new region, but that restore is slow compared to a Site Recovery failover, and it will not meet a minutes-long RTO. Backup covers data loss well; for a dead region or datacenter, pair it with Site Recovery.
What is RPO and RTO in Azure Site Recovery?
RPO, recovery point objective, is how much data you can afford to lose, measured as how far back your last good copy sits. RTO, recovery time objective, is how long you can afford to be down. Site Recovery targets both with continuous replication and failover in minutes, tighter than Backup's daily or multi-times-a-day recovery points.
Does Azure Site Recovery replace Azure Backup?
No. Site Recovery replicates continuously, so it faithfully copies corruption or a bad delete to the secondary along with everything else. It has no history of past states to go back to. Backup supplies that history. Most estates run both: Backup for data recovery, Site Recovery for site failover.
What is the RTO for Azure Site Recovery?
Microsoft's SLA commits to a recovery time objective of one hour for a Site Recovery failover, and in practice failovers often complete in minutes because the secondary workload is already replicated and standing by. That is far tighter than restoring a whole environment from Backup recovery points.
Do I need a third-party backup product with Azure?
Usually not, if the estate is Azure-only and immutable Recovery Services vaults meet your requirements. A third-party platform earns its licence when you need to protect more than Azure from one console, when you need the control plane and backup copies to live outside your Azure tenant so a tenant compromise cannot destroy them, or when centralized policy and mass-recovery tooling matter at scale. Compare total cost including egress against the isolation you genuinely need, not the licence alone.