Is Kopia or rustic better?

Neither clearly leads. Kopia starts at Free and rustic at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Kopia or rustic?

Kopia starts at Free and rustic at Free.

Does Kopia or rustic run on more platforms?

Kopia runs on Linux, macOS, Windows, Docker. rustic runs on Linux, macOS, Windows.

Can I use Kopia for free?

Both have a free tier, so you can try either at no cost before committing.

What is Kopia best used for?

Kopia is most often used for backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job, deduplicating backups of several similar machines into one repository so common content is stored once, replacing a chunk based tool whose per object charges made a cheap bucket expensive, keeping an encrypted offsite copy where the storage provider must never be able to read the contents. Of those, backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job and deduplicating backups of several similar machines into one repository so common content is stored once are not what rustic is typically brought in for.

What can Kopia do that rustic cannot?

Kopia covers Content defined chunking, Global deduplication, Pack blobs, Client side encryption. rustic covers restic format compatibility, Configuration profiles, Deduplicated encrypted backups, Cold and append only storage support.

Backup · head to head

Kopia vs rustic

Kopia

Backup

Open source deduplicating backup with client side encryption and a repository on almost any storage

From: Free
Rated: -

Full review Website

rustic

Backup

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

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Kopia space is only reclaimed when maintenance runs, and in a shared repository full maintenance is owned by one client, so if that machine goes away the repository grows for ever while every backup still reports success.; 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.
They diverge on capability: Kopia covers Content defined chunking, rustic covers restic format compatibility.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Kopia and rustic actually diverge.

Attributes where Kopia and rustic differ
Attribute	Kopia	rustic
Platforms	Linux, macOS, Windows, Docker	Linux, macOS, Windows

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), 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 Kopia

Content defined chunking
Global deduplication
Pack blobs
Client side encryption
Desktop and command line
Repository verification

Only in rustic

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

What people use each for

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

Kopia

Backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron jobnot rustic
Deduplicating backups of several similar machines into one repository so common content is stored oncenot rustic
Replacing a chunk based tool whose per object charges made a cheap bucket expensivenot rustic
Keeping an encrypted offsite copy where the storage provider must never be able to read the contentsnot rustic

rustic

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

Where each one falls short

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

Kopia

Space is only reclaimed when maintenance runs, and in a shared repository full maintenance is owned by one client, so if that machine goes away the repository grows for ever while every backup still reports success.
The repository format has changed across versions and mixing client versions against one repository is discouraged, so a fleet must be upgraded together rather than machine by machine.
There is no central orchestration or reporting for many machines, so monitoring a fleet means building your own alerting around exit codes.
Restoring many small files is slower than the backup was, because content must be reassembled from pack blobs, and this is rarely tested until the day it matters.
Encryption is client side with no escrow, so a lost repository password means the data is unrecoverable and there is no vendor to appeal to.

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.

Pricing, plan by plan

Kopia

Free

KopiaFree
- Full functionality, no data limit
- Desktop application included
- Any supported storage back end

rustic

Free

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

Which should you pick?

Choose Kopia if

You need content defined chunking.
You want to start without paying.
You work on Linux, macOS, Windows, Docker.
You also want global deduplication.

Kopia review

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

Questions people ask

Is Kopia or rustic better?: Neither clearly leads. Kopia starts at Free and rustic at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kopia or rustic?: Kopia starts at Free and rustic at Free.
Does Kopia or rustic run on more platforms?: Kopia runs on Linux, macOS, Windows, Docker. rustic runs on Linux, macOS, Windows.
Can I use Kopia for free?: Both have a free tier, so you can try either at no cost before committing.
What is Kopia best used for?: Kopia is most often used for backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job, deduplicating backups of several similar machines into one repository so common content is stored once, replacing a chunk based tool whose per object charges made a cheap bucket expensive, keeping an encrypted offsite copy where the storage provider must never be able to read the contents. Of those, backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job and deduplicating backups of several similar machines into one repository so common content is stored once are not what rustic is typically brought in for.
What can Kopia do that rustic cannot?: Kopia covers Content defined chunking, Global deduplication, Pack blobs, Client side encryption. rustic covers restic format compatibility, Configuration profiles, Deduplicated encrypted backups, Cold and append only storage support.

Answered from the vendors’ own pages

Kopia: Is a partly corrupt repository still restorable?

Partly. Deduplication means one damaged pack blob affects every snapshot referencing its contents, but unaffected files still restore. Run verification regularly rather than assuming.

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.

Kopia: How does it compare with restic?

Similar guarantees, with packing that behaves better on per operation billing, a desktop interface, and compression enabled by default.

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.

Kopia: Do I need to run maintenance manually?

It is scheduled automatically by default, but you must ensure the client that owns full maintenance keeps running, otherwise deleted snapshots never free space.

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.

Kopia: Can several machines share one repository?

Yes, and that is where deduplication pays off, but they should run compatible versions and only one owns full maintenance.

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.

Kopia vs rustic

Kopia

rustic

The short version

Where they differ

What each one covers

Only in Kopia

Only in rustic

What people use each for

Kopia

rustic

Where each one falls short

Kopia

rustic

Pricing, plan by plan

Kopia

rustic

Which should you pick?

Choose Kopia if

Choose rustic if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Kopia

More on rustic

Keep looking

Other head to heads