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Software · head to head

Altaro VM Backup vs Datto SIRIS

Altaro VM Backup logo

Altaro VM Backup

Software

Simple and powerful VM backup for SMBs

From
$595/perpetual
Rated
-
Full reviewWebsite
Datto SIRIS logo

Datto SIRIS

Software

All-in-one business continuity and disaster recovery

From
$1095/one-time + recurring
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Altaro VM Backup limited to small and medium-market businesses with up to 50 host servers; Datto SIRIS requires on-premises appliance, not purely cloud-native
  • They diverge on capability: Altaro VM Backup covers Augmented inline dedup, Datto SIRIS covers Instant virtualization.

Where they differ

Only the attributes on which Altaro VM Backup and Datto SIRIS actually diverge.

Attributes where Altaro VM Backup and Datto SIRIS differ
AttributeAltaro VM BackupDatto SIRIS
Starting price$595/perpetual$1095/one-time + recurring
PlatformsWindows ServerLinux, Virtual Environments
Founded20092011

Identical on both: pricing model (Unknown), free tier (No), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Altaro VM Backup

  • Augmented inline dedup
  • WAN-optimized replication
  • Boot from backup
  • Granular restore
  • Cloud management
  • Continuous CDP
  • Azure
  • AWS S3

Only in Datto SIRIS

  • Instant virtualization
  • Screenshot verification
  • Ransomware detection
  • Inverse chain technology
  • Cloud-first architecture
  • Automated DR testing
  • Windows Server
  • Microsoft 365

Both cover

  • VMware
  • Hyper-V
  • Windows support
  • Web support

What people use each for

The jobs each tool is most often brought in to do.

Altaro VM Backup

  • Data protection
  • Disaster recovery
  • Business continuity
  • Ransomware protection
  • Compliance

Datto SIRIS

  • Data protection
  • Disaster recovery
  • Business continuity
  • Ransomware protection
  • Compliance

Both are used for data protection, disaster recovery, business continuity, ransomware protection, compliance, on those jobs the choice comes down to price and fit rather than capability.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Altaro VM Backup

  • Limited to small and medium-market businesses with up to 50 host servers
  • Perpetual license model outdated compared to modern cloud-based backup solutions
  • Lacks enterprise-grade features for large-scale deployments
  • Offsite backup to cloud requires additional setup and configuration

Datto SIRIS

  • Requires on-premises appliance, not purely cloud-native
  • Initial setup and hardware costs can be substantial for smaller MSPs

Pricing, plan by plan

Altaro VM Backup

$595/perpetual

No published plan breakdown. See the Altaro VM Backup review.

Datto SIRIS

$1095/one-time + recurring

No published plan breakdown. See the Datto SIRIS review.

Which should you pick?

Choose Altaro VM Backup if

  • You need augmented inline dedup.
  • You work on Windows Server.
  • You also want wan-optimized replication.
Altaro VM Backup review

Choose Datto SIRIS if

  • You need instant virtualization.
  • You work on Linux, Virtual Environments.
  • You also want screenshot verification.
Datto SIRIS review

Questions people ask

Is Altaro VM Backup or Datto SIRIS better?
Neither clearly leads. Altaro VM Backup starts at $595/perpetual and Datto SIRIS at $1095/one-time + recurring, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Altaro VM Backup or Datto SIRIS?
Altaro VM Backup starts at $595/perpetual and Datto SIRIS at $1095/one-time + recurring.
Does Altaro VM Backup or Datto SIRIS run on more platforms?
Altaro VM Backup runs on Windows Server. Datto SIRIS runs on Linux, Virtual Environments.
What is Altaro VM Backup best used for?
Altaro VM Backup is most often used for data protection, disaster recovery, business continuity, ransomware protection.
What can Altaro VM Backup do that Datto SIRIS cannot?
Altaro VM Backup covers Augmented inline dedup, WAN-optimized replication, Boot from backup, Granular restore. Datto SIRIS covers Instant virtualization, Screenshot verification, Ransomware detection, Inverse chain technology. Both handle VMware, Hyper-V, Windows support, Web support.

Answered from the vendors’ own pages

Altaro VM Backup: What is the price per host for Altaro VM Backup?

Altaro VM Backup pricing starts at $595 per host for the Standard Edition, with the Unlimited Edition at $695 per host and Unlimited Plus at $875 per host. Pricing includes the first year of priority support and updates.

Source
Datto SIRIS: What does SIRIS protect against?

Datto SIRIS includes immutable cloud backups, automated recovery verification, and integrated ransomware detection through Cloud Deletion Defense which undoes accidental or malicious backup deletion.

Source
Datto SIRIS: What's the pricing model?

Datto SIRIS uses flat-rate pricing starting at $1,095, which includes installation, storage, VIP support, recoveries, two annual DR tests, and five-year warranty.

Source
Datto SIRIS: What integrations does SIRIS have?

Datto SIRIS integrates natively with Autotask PSA, Datto RMM, ConnectWise Automate, and ConnectWise PSA. It also supports virtualization platforms like vSphere and CentOS Linux.

Source
Datto SIRIS: Is SIRIS cloud-only or appliance-based?

Datto SIRIS is an on-premises appliance that backs up data to Datto's cloud. You do not need to maintain your own physical server infrastructure for the core SIRIS functionality.

Source
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