Always-On Replication Solution - Protect Your Data - Zerto

Always-On Replication

At the core of Zerto is always-on replication, the engine delivering continuous data protection and industry-leading disaster recovery

How Does Zerto Replication Work?

Learn more about how Zerto's flexible software-only, scale-out architecture can help you protect applications while minimizing data loss.

How It All Started

In 2011, Zerto introduced hypervisor-based replication to the world. By moving replication up the stack from the storage layer and into the hypervisor, Zerto created the first and only solution that delivers enterprise-class, always-on replication for disaster recovery (DR) and migrations on private, public, or public clouds.

Why Replicate Within the Hypervisor?

Unlike some data protection solutions that use cumbersome snapshots and agents, Zerto provides continuous replication with zero impact on application performance recovery. 

Hypervisor-based replication natively integrates with all supported platforms, meaning it is hardware agnostic and not dependent on the underlying storage arrays. It also supports the full breadth of capabilities made possible by virtualization, including high availability, clustering, vMotions, etc. 

Zerto Business and Operational Benefits

What is Hypervisor-Based Replication?

How Zerto Replication Works

The following components reside at the heart of Zerto platform’s replication technology:

Zerto Virtual Manager (ZVM)

The management server integrates with vCenter and has an intuitive interface that orchestrates user-initiated operations with simplicity.

Zerto Cloud Appliance (ZCA)

In public clouds, the ZVM is replaced by a ZCA for cloud management. It integrates natively, using cost-efficient storage offerings, APIs, and cloud scaling features.

Virtual Replication Appliance (VRA)

Our scale-out replication appliance with built-in WAN optimization, encryption, and quality of service (QoS), replicates every change generated to the target journal—the true workhorse of continuous data protection.

VRAs, whether on-premises or in the cloud, copy every data write after the underlying storage acknowledges it. A VRA on the source site then sends this copy to a VRA on the target site before committing the I/O to the journal in the order that it was generated to ensure write-order fidelity. As the journal fills, it then commits the oldest recovery points to the replica disk.

How Zerto Replication Works

Zerto Components

Zerto Near-Synchronous Replication for Lowest RPOs and RTOs

Zerto’s software-only approach achieves replication benefits nearly identical to those found in expensive hardware-based synchronous replication solutions— but with RTOs of minutes and RPOs of seconds. On top of that, software-based asynchronous replication is much cheaper and more practical than its hardware counterpart—and it’s easier to deploy and support.

RTO and RPO Explained

Replication Technologies: Synchronous, Asynchronous, and Near-Synchronous

Enable Cross-Platform Replication

With automatic, on-the-fly conversion of VMs, you no longer need to match platforms between your datacenters. This allows you to use the platform of your choice—depending on your workload, cost, performance, and availability—without being locked in by technical limitations. Easily protect to or from the cloud without worrying about the underlying infrastructure layers.

One-to-Many Multi-Site Replication

Zerto’s innovative one-to-many feature allows a VM to simultaneously replicate to several target platforms—including VMware vSphere, Azure, AWS, VMware on public cloud, or over 350 managed service providers—while also replicating locally or to a second remote site.

Protect Interdependent Applications

One-to-many replication can maintain a local replica of individual applications, with a protection group at the remote site for all interdependent applications. Write-order fidelity operations and app-centric protection enables recovery of the entire multi-VM app stack or data center to the exact same point in time within minutes.

Migrate Without Risk

One-to-many enables replication of applications, VMs, and data to the new location without breaking the existing replication and protection. Validate your migration project without impacting production—simply test and prove recovery and performance in the new site, then complete the actual migration faster and without risk.

True Multi-Cloud

Zerto allows you to transform your business and replicate applications, VMs, and data within a local datacenter, to a secondary datacenter, and over 350+ clouds—including Microsoft Azure, AWS, and VMware on Google Cloud, Oracle Cloud, and IBM Cloud.

Key Benefits

Unmatched replication granularity

Replicate at the correct level of any virtual entity—a single machine, group, or application.

Scalable to match infrastructures of any size

Easily deploy and manage Zerto’s always-on replication regardless of infrastructure size or expansion speed.

Works with any hardware or cloud

Replicate near-synchronously to virtually all storage arrays through Zerto's platform- and hardware-agnostic approach.

Easily integrated

Leverage Zerto’s position in the hypervisor to integrate deeply with your underlying platform or cloud.

What's Next?

Have a question about our product or capabilities? Contact us, we are here to help!

See Zerto in Action

Check out these short videos to see what Zerto can do for you.

Try Zerto

Want to give Zerto a try? Get a free 14-day license or access to our on-demand labs.


After Replication: Recovery

Learn about Zerto's journal-based recovery and how it can deliver the fastest RPOs and RTOs in the industry.

Backup Versus Replication

Learn about the main differences between backup and replication.

Zerto for Multi-Cloud and Hybrid Cloud

Discover Zerto's multi-cloud capability with replication to, from, and between sites, even across regions or to other public clouds.

Explore Zerto

Get an overview of your command center for data protection and disaster recovery

Tour Zerto

See how things get done and drill down into specific Zerto workflows and features.