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Backup · head to head

Comet Backup vs Datto SIRIS

Comet Backup logo

Comet Backup

Backup

White-label backup software for service providers

From
$19/month
Rated
-
Full reviewWebsite
Datto SIRIS logo

Datto SIRIS

Backup

All-in-one business continuity and disaster recovery

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

The short version

  • Each has a real cost: Comet Backup per-endpoint costs ($2/month per endpoint) can add up for large deployments with many protected machines; Datto SIRIS requires on-premises appliance, not purely cloud-native
  • They diverge on capability: Comet Backup covers White-label branding, Datto SIRIS covers Instant virtualization.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Comet Backup and Datto SIRIS differ
AttributeComet BackupDatto SIRIS
Starting price$19/month$1095/one-time + recurring
Pricing modelsubscriptionUnknown
PlatformsWindows, macOS, LinuxLinux, Virtual Environments
Founded20172011

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

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 Comet Backup

  • White-label branding
  • Bring your own storage
  • End-to-end encryption
  • Chunking deduplication
  • Delta compression
  • Multi-tenant
  • AWS S3
  • Azure

Only in Datto SIRIS

  • Instant virtualization
  • Screenshot verification
  • Ransomware detection
  • Inverse chain technology
  • Cloud-first architecture
  • Automated DR testing
  • VMware
  • Hyper-V

Both cover

  • Windows support
  • Linux support
  • Web support

What people use each for

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

Comet Backup

  • MSP backup and disaster recovery solutionsnot Datto SIRIS
  • Cloud-to-cloud backup automationnot Datto SIRIS
  • Ransomware protection with immutable storagenot Datto SIRIS

Datto SIRIS

  • Data protectionnot Comet Backup
  • Disaster recoverynot Comet Backup
  • Business continuitynot Comet Backup
  • Ransomware protectionnot Comet Backup
  • Compliancenot Comet Backup

Where each one falls short

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

Comet Backup

  • Per-endpoint costs ($2/month per endpoint) can add up for large deployments with many protected machines
  • Advanced and Enterprise tiers with additional management capabilities are significantly more expensive than base tiers
  • Platform-specific features (SQL, MySQL, MongoDB, Microsoft 365) have separate per-unit pricing

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

Comet Backup

$19/month
  • Starter$19/month
    • 1 self-hosted license
    • Endpoint scaling at $2/endpoint/month
  • Growth$49/month
    • 2 self-hosted licenses
    • Primary/replica setups
    • Endpoint scaling at $2/endpoint/month
  • Advanced$99/month
    • 5 management console licenses
    • Audit logging
    • Air-gap management console
  • Professional (Cloud-Hosted)$49/month
    • 1 cloud-hosted console license
    • Endpoint scaling at $2/endpoint/month

Datto SIRIS

$1095/one-time + recurring

No published plan breakdown. See the Datto SIRIS review.

Which should you pick?

Choose Comet Backup if

  • You need white-label branding.
  • You work on Windows, macOS, Linux.
  • You also want bring your own storage.
Comet 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 Comet Backup or Datto SIRIS better?
Neither clearly leads. Comet Backup starts at $19/month 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, Comet Backup or Datto SIRIS?
Comet Backup starts at $19/month and Datto SIRIS at $1095/one-time + recurring.
Does Comet Backup or Datto SIRIS run on more platforms?
Comet Backup runs on Windows, macOS, Linux. Datto SIRIS runs on Linux, Virtual Environments.
What is Comet Backup best used for?
Comet Backup is most often used for msp backup and disaster recovery solutions, cloud-to-cloud backup automation, ransomware protection with immutable storage. Of those, msp backup and disaster recovery solutions and cloud-to-cloud backup automation are not what Datto SIRIS is typically brought in for.
What can Comet Backup do that Datto SIRIS cannot?
Comet Backup covers White-label branding, Bring your own storage, End-to-end encryption, Chunking deduplication. Datto SIRIS covers Instant virtualization, Screenshot verification, Ransomware detection, Inverse chain technology. Both handle Windows support, Linux support, Web support.

Answered from the vendors’ own pages

Comet Backup: How much does Comet Backup cost?

Self-hosted plans start at $19/month (Starter) and go up to $99/month (Advanced), with cloud-hosted plans starting at $49/month (Professional). All plans charge $2 per endpoint per month for additional protected machines beyond the base license count.

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
Comet Backup: What is the price difference between self-hosted and cloud-hosted deployments?

Cloud-hosted plans start at $49/month (Professional) versus self-hosted which starts at $19/month (Starter). The main advantage of cloud-hosted is Comet manages the console infrastructure, though both models charge the same per-endpoint fees.

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
Comet Backup: Does Comet Backup charge for additional protected machines?

Yes, all plans charge $2 per endpoint per month beyond the licensed endpoints. For example, the Growth plan includes 2 self-hosted licenses, but each additional protected machine costs $2/month.

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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