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Cloud · head to head

Longhorn vs MinIO

Longhorn logo

Longhorn

Cloud

Open source distributed block storage for Kubernetes, incubating at the CNCF

From
Free
Rated
-
Full reviewWebsite
MinIO logo

MinIO

File Storage

S3-compatible object storage server you run yourself, now under AGPL with a stripped community edition

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Longhorn there is no vendor and no SLA, so a production incident at three in the morning is your own problem unless you buy SUSE Rancher Prime support separately.; MinIO the AGPL v3 licence applies copyleft over network use, so embedding MinIO in a product or hosted service obliges you to release your own source or buy a commercial licence, and legal review has removed it from several vendor stacks for this reason alone.
  • They diverge on capability: Longhorn covers Per-volume controllers, MinIO covers S3 API implementation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Longhorn and MinIO actually diverge.

Attributes where Longhorn and MinIO differ
AttributeLonghornMinIO
PlatformsLinux, KubernetesLinux, macOS, Windows, Kubernetes, Docker
CategoryCloudFile Storage

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).

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 Longhorn

  • Per-volume controllers
  • Synchronous replication
  • Snapshots and backups
  • Volume expansion
  • Disaster recovery volumes
  • Web interface

Only in MinIO

  • S3 API implementation
  • Erasure coding
  • Single binary deployment
  • Bucket replication
  • Object locking and versioning
  • Identity provider integration

What people use each for

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

Longhorn

  • An on-premises Kubernetes cluster with local disks and no SAN that needs replicated persistent volumesnot MinIO
  • Edge sites where shipping a storage array is impractical and three nodes is the whole clusternot MinIO
  • A K3s deployment where the storage layer must be light enough to run alongside the workloadsnot MinIO
  • A team that wants snapshots and S3 backups of persistent volumes without paying per-node storage licencesnot MinIO

MinIO

  • Providing an S3 endpoint inside an air gapped or regulated network where a cloud bucket is not permittednot Longhorn
  • Backing a Kubernetes platform with object storage that lives on the same hardware as the clusternot Longhorn
  • Standing up S3 semantics in CI so tests exercise the same API path as productionnot Longhorn
  • Fronting local disk shelves with an S3 interface so applications only ever learn one storage APInot Longhorn

Where each one falls short

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

Longhorn

  • There is no vendor and no SLA, so a production incident at three in the morning is your own problem unless you buy SUSE Rancher Prime support separately.
  • Synchronous replication across nodes means write latency depends on the slowest replica and the network between nodes, which makes it a poor fit for latency-sensitive databases.
  • Every replica is a full copy, so three-way replication consumes three times the raw capacity, unlike erasure-coded systems that are far more space efficient.
  • It is designed for block storage on modest clusters and does not scale to the node counts or throughput that Ceph or a commercial array handles, so growth eventually forces a migration.
  • Recovery from certain degraded states, such as a volume stuck detaching or replicas failing to rebuild, requires manual intervention and knowledge of Longhorn internals that is not widely held.

MinIO

  • The AGPL v3 licence applies copyleft over network use, so embedding MinIO in a product or hosted service obliges you to release your own source or buy a commercial licence, and legal review has removed it from several vendor stacks for this reason alone.
  • The community edition console was reduced in 2025 to an object browser, so user, policy, bucket and configuration management now happen through the mc command line client or through the paid product, which is a real operational regression for teams that trained staff on the UI.
  • The vendor has changed the terms of the free edition twice, so planning long lived infrastructure around the community build carries the risk that the next change removes something you depend on.
  • Erasure coded deployments cannot be grown by adding single drives; capacity is added in server pools, so expansion is a hardware purchase in units rather than an incremental one.
  • Commercial pricing is capacity based and aimed at large deployments, so a team that outgrows the community edition faces an enterprise sized quote rather than a graduated upgrade path.

Pricing, plan by plan

Longhorn

Free
  • LonghornFree
    • Apache 2.0 licensed, no licence fee
    • Community support via GitHub and Slack only
    • No vendor SLA or escalation path

MinIO

Free
  • Community (AGPL v3)Free
    • Full server functionality
    • Erasure coding and replication
    • Object browser only in the web console
  • AIStor$undefined/year
    • Commercial licence removing AGPL obligations
    • Full management console
    • Vendor support with response commitments

Which should you pick?

Choose Longhorn if

  • You need per-volume controllers.
  • You want to start without paying.
  • You work on Linux, Kubernetes.
  • You also want synchronous replication.
Longhorn review

Choose MinIO if

  • You need s3 api implementation.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Kubernetes, Docker.
  • You also want erasure coding.
MinIO review

Questions people ask

Is Longhorn or MinIO better?
Neither clearly leads. Longhorn starts at Free and MinIO at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Longhorn or MinIO?
Longhorn starts at Free and MinIO at Free.
Does Longhorn or MinIO run on more platforms?
Longhorn runs on Linux, Kubernetes. MinIO runs on Linux, macOS, Windows, Kubernetes, Docker.
Can I use Longhorn for free?
Both have a free tier, so you can try either at no cost before committing.
What is Longhorn best used for?
Longhorn is most often used for an on-premises kubernetes cluster with local disks and no san that needs replicated persistent volumes, edge sites where shipping a storage array is impractical and three nodes is the whole cluster, a k3s deployment where the storage layer must be light enough to run alongside the workloads, a team that wants snapshots and s3 backups of persistent volumes without paying per-node storage licences. Of those, an on-premises kubernetes cluster with local disks and no san that needs replicated persistent volumes and edge sites where shipping a storage array is impractical and three nodes is the whole cluster are not what MinIO is typically brought in for.
What can Longhorn do that MinIO cannot?
Longhorn covers Per-volume controllers, Synchronous replication, Snapshots and backups, Volume expansion. MinIO covers S3 API implementation, Erasure coding, Single binary deployment, Bucket replication.

Answered from the vendors’ own pages

Longhorn: Who do we call when it breaks?

Nobody, unless you buy SUSE Rancher Prime, which includes commercial support for Longhorn. This is the decisive question for production use.

MinIO: Can I still use MinIO for free?

Yes, the AGPL v3 server remains available and functional. What changed is the console, which no longer manages users, policies or configuration in the community build.

Longhorn: How much capacity does replication cost?

Full copies, so three replicas means three times the raw capacity. Budget accordingly rather than assuming erasure coding efficiency.

MinIO: Does AGPL affect me if I only use it internally?

Internal use without offering the software over a network to third parties generally does not trigger the source obligation, but if MinIO forms part of a service you offer to others, it does. Take advice rather than a forum answer.

Longhorn: Is it suitable for production databases?

For modest workloads yes, but synchronous replication adds write latency and high-transaction databases usually want something faster.

MinIO: What replaced the community console features?

The mc client and the server admin API. Third party UIs exist but they are not maintained by MinIO.

MinIO: Is it suitable as a Veeam or restic backup target?

Yes, object locking and versioning work and both tools treat it as standard S3. Immutability depends on configuring the lock policy at bucket creation.

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