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Backup · head to head

rustic vs Spanning Backup

rustic logo

rustic

Backup

Rust reimplementation of restic that reads and writes the same repository format

From
Free
Rated
-
Full reviewWebsite
Spanning Backup logo

Spanning Backup

Backup

SaaS backup for Google Workspace and Microsoft 365

From
$4/month
Rated
-
Full reviewWebsite

The short version

  • Only rustic has a free tier, so it costs nothing to try first.
  • Each has a real cost: rustic the project is small with a short list of active maintainers, so bus factor is a genuine consideration for software whose job is to still work in five years.; Spanning Backup no pricing published; requires quote request
  • They diverge on capability: rustic covers restic format compatibility, Spanning Backup covers Automated daily backup.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which rustic and Spanning Backup actually diverge.

Attributes where rustic and Spanning Backup differ
AttributerusticSpanning Backup
Starting priceFree$4/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsLinux, macOS, WindowsCloud SaaS
FoundedUnknown2010

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 rustic

  • restic format compatibility
  • Configuration profiles
  • Deduplicated encrypted backups
  • Cold and append only storage support
  • Multiple back ends
  • Library crates

Only in Spanning Backup

  • Automated daily backup
  • Point-in-time restore
  • Cross-user restore
  • eDiscovery
  • Unlimited storage
  • Admin delegation
  • Google Workspace
  • Microsoft 365

What people use each for

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

rustic

  • An existing restic user who wants configuration files rather than long command lines in cronnot Spanning Backup
  • Backing up a memory constrained machine where the reference implementation is uncomfortably heavynot Spanning Backup
  • Writing to append only or cold object storage where the default tooling assumes rewritable bucketsnot Spanning Backup
  • Keeping a second implementation available so a long lived archive does not depend on one codebasenot Spanning Backup

Spanning Backup

  • SaaS backup and recoverynot rustic
  • Microsoft 365 backupnot rustic
  • Google Workspace backupnot rustic
  • Salesforce backupnot rustic

Where each one falls short

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

rustic

  • The project is small with a short list of active maintainers, so bus factor is a genuine consideration for software whose job is to still work in five years.
  • It inherits the restic repository format, so design limits in that format, including the cost of pruning large repositories, are inherited rather than fixed.
  • Command names, flags and behaviour do not map one to one onto restic, so scripts and runbooks need rewriting rather than a binary swap.
  • Far fewer people have performed a real restore from it under pressure, and backup software is one of the few categories where being second most used is itself a risk.
  • Alternating between rustic and restic against one repository works but doubles the surface for a version incompatibility to corrupt state, so most operators should pick one and stay with it.

Spanning Backup

  • No pricing published; requires quote request
  • Pricing is customizable based on data volume and service changes

Pricing, plan by plan

rustic

Free
  • rusticFree
    • Full functionality, no data limit
    • All supported storage back ends
    • Community support via GitHub

Spanning Backup

$4/month
  • Spanning Backup$4/month
    • Daily backup
    • Point-in-time restore
    • Unlimited storage

Which should you pick?

Choose rustic if

  • You need restic format compatibility.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want configuration profiles.
rustic review

Choose Spanning Backup if

  • You need automated daily backup.
  • You work on Cloud SaaS.
  • You also want point-in-time restore.
Spanning Backup review

Questions people ask

Is rustic or Spanning Backup better?
Neither clearly leads. rustic starts at Free and Spanning Backup at $4/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, rustic or Spanning Backup?
rustic has a free tier; the other does not. Paid plans start at Free for rustic and $4/month for Spanning Backup.
Does rustic or Spanning Backup run on more platforms?
rustic runs on Linux, macOS, Windows. Spanning Backup runs on Cloud SaaS.
Can I use rustic for free?
Yes. rustic has a free tier, so you can try it without paying. Spanning Backup starts at $4/month.
What is rustic best used for?
rustic is most often used for an existing restic user who wants configuration files rather than long command lines in cron, backing up a memory constrained machine where the reference implementation is uncomfortably heavy, writing to append only or cold object storage where the default tooling assumes rewritable buckets, keeping a second implementation available so a long lived archive does not depend on one codebase. Of those, an existing restic user who wants configuration files rather than long command lines in cron and backing up a memory constrained machine where the reference implementation is uncomfortably heavy are not what Spanning Backup is typically brought in for.
What can rustic do that Spanning Backup cannot?
rustic covers restic format compatibility, Configuration profiles, Deduplicated encrypted backups, Cold and append only storage support. Spanning Backup covers Automated daily backup, Point-in-time restore, Cross-user restore, eDiscovery.

Answered from the vendors’ own pages

rustic: Can it read my existing restic repository?

Yes, that is the point of the project. Take a copy and verify before you rely on it, as with any change to backup tooling.

Spanning Backup: How much does Spanning Backup cost?

Spanning Backup does not publish pricing online. The company offers FLEXspend, a feature that gives complete flexibility in adjusting backup spend based on data changes. Customers must request a quote through their pricing page.

Source
rustic: Should I switch from restic?

Only for a specific reason such as configuration profiles, memory use or cold storage handling. Compatibility means there is no cost to trying and no cost to going back.

Spanning Backup: Does Spanning Backup offer a free trial?

Yes, Spanning Backup offers a free trial. Customers can also book a call or request a demo to discuss their specific backup needs and receive a custom quote.

Source
rustic: Is it production ready?

It is used in production by a small community, but it is younger and less exercised than the implementation it is compatible with. Test restores accordingly.

Spanning Backup: What products does Spanning Backup cover?

Spanning Backup provides backup solutions for Microsoft 365, Google Workspace, and Salesforce with customizable pricing based on organizational needs.

Source
rustic: Does it support the same back ends?

The common ones, including local, SFTP, S3 compatible storage and rclone. Check the current list before committing to an unusual target.

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