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Backup · head to head

Datto SIRIS vs UrBackup

Datto SIRIS logo

Datto SIRIS

Backup

All-in-one business continuity and disaster recovery

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

UrBackup

Backup

Open source client server backup doing both file and whole disk image backups of Windows machines

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only UrBackup has a free tier, so it costs nothing to try first.
  • Each has a real cost: Datto SIRIS requires on-premises appliance, not purely cloud-native; UrBackup backups are stored on the server without encryption at rest by default, so the backup server holds a readable copy of every machine it protects and becomes the highest value target on the network.
  • They diverge on capability: Datto SIRIS covers Instant virtualization, UrBackup covers Windows image backups.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Datto SIRIS and UrBackup actually diverge.

Attributes where Datto SIRIS and UrBackup differ
AttributeDatto SIRISUrBackup
Starting price$1095/one-time + recurringFree
Pricing modelUnknownOpen source, no licence fee
Free tierNoYes
PlatformsLinux, Virtual EnvironmentsLinux, Windows, macOS, FreeBSD
Founded2011Unknown

Identical on both: 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 Datto SIRIS

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

Only in UrBackup

  • Windows image backups
  • File backups
  • Web interface
  • Client discovery
  • Internet mode
  • Filesystem deduplication

What people use each for

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

Datto SIRIS

  • Data protectionnot UrBackup
  • Disaster recoverynot UrBackup
  • Business continuitynot UrBackup
  • Ransomware protectionnot UrBackup
  • Compliancenot UrBackup

UrBackup

  • A small office with Windows workstations that needs bare metal restore without per seat licensingnot Datto SIRIS
  • Schools and labs where machines are re-imaged often and a known good image must be recoverablenot Datto SIRIS
  • Backing up a mixed fleet to one server on premises with a web interface non specialists can usenot Datto SIRIS
  • Replacing an expiring commercial endpoint backup licence where the budget is the constraintnot Datto SIRIS

Where each one falls short

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

Datto SIRIS

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

UrBackup

  • Backups are stored on the server without encryption at rest by default, so the backup server holds a readable copy of every machine it protects and becomes the highest value target on the network.
  • Deduplication relies on filesystem features such as hard links, btrfs or ZFS, so a server built on the wrong filesystem silently consumes far more space and the fix is a rebuild rather than a setting.
  • There is no native object storage target, so offsite copies mean replicating the server storage with another tool rather than backing up to a bucket directly.
  • Restoring a full Windows image requires booting a restore environment, which is a manual, on site procedure that needs to be rehearsed before the day it is needed.
  • A single server holds everything and there is no built in clustering, so its own failure removes every recovery point at once unless you have separately solved replication.

Pricing, plan by plan

Datto SIRIS

$1095/one-time + recurring

No published plan breakdown. See the Datto SIRIS review.

UrBackup

Free
  • UrBackupFree
    • Full functionality, unlimited clients
    • File and image backups
    • Web administration interface

Which should you pick?

Choose Datto SIRIS if

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

Choose UrBackup if

  • You need windows image backups.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, FreeBSD.
  • You also want file backups.
UrBackup review

Questions people ask

Is Datto SIRIS or UrBackup better?
Neither clearly leads. Datto SIRIS starts at $1095/one-time + recurring and UrBackup at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Datto SIRIS or UrBackup?
UrBackup has a free tier; the other does not. Paid plans start at $1095/one-time + recurring for Datto SIRIS and Free for UrBackup.
Does Datto SIRIS or UrBackup run on more platforms?
Datto SIRIS runs on Linux, Virtual Environments. UrBackup runs on Linux, Windows, macOS, FreeBSD.
Can I use UrBackup for free?
Yes. UrBackup has a free tier, so you can try it without paying. Datto SIRIS starts at $1095/one-time + recurring.
What is Datto SIRIS best used for?
Datto SIRIS is most often used for data protection, disaster recovery, business continuity, ransomware protection. Of those, data protection and disaster recovery are not what UrBackup is typically brought in for.
What can Datto SIRIS do that UrBackup cannot?
Datto SIRIS covers Instant virtualization, Screenshot verification, Ransomware detection, Inverse chain technology. UrBackup covers Windows image backups, File backups, Web interface, Client discovery.

Answered from the vendors’ own pages

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
UrBackup: Does it back up Linux servers as well?

File backups yes, image backups no. The image path is Windows only through volume shadow copy.

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
UrBackup: Is the data encrypted?

Transport can be encrypted, and there is optional client side file encryption, but the default server storage is not encrypted at rest. Use full disk encryption on the server.

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
UrBackup: Can I back up to Amazon S3?

Not directly. The server writes to local or mounted storage, so cloud copies are made by replicating that storage separately.

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
UrBackup: How many clients can one server handle?

Dozens is routine on decent hardware. The limit is usually storage input and output during overlapping backup windows rather than client count.

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