Longhornvs
Rook
Rook: Open source Ceph on Kubernetes, harder to operate but scales further and supports object and file as well as block
Longhorn
Open source distributed block storage for Kubernetes, incubating at the CNCF
As of 1 September 2026, Longhorn is free to use. Free replicated block storage for Kubernetes that installs in minutes and needs no storage array. Softwr lists it under Cloud. Longhorn is made by Cloud Native Computing Foundation, available on Linux, Kubernetes.
Overview
What Longhorn does
Longhorn is a distributed block storage system for Kubernetes. It creates a dedicated storage controller per volume and synchronously replicates each volume across nodes, so a node failure does not take the data with it. It provides snapshots, backups to S3-compatible object storage or NFS, volume expansion, and a web user interface for managing it all. It was created by Rancher Labs, donated to the Cloud Native Computing Foundation, and is an incubating project there. The distinguishing property is simplicity relative to the alternatives. Ceph is a storage platform with its own operational discipline; Longhorn is a Helm chart that turns local disks into replicated persistent volumes and is understandable by a team that does not employ a storage engineer. That makes it the default choice for edge clusters, on-premises Kubernetes without a SAN, and homelab or small production workloads. The trade-off is the support question, and it is the one that decides adoption. As a CNCF project Longhorn has no vendor, no SLA and no paid escalation path; you get GitHub issues and a Slack channel. SUSE offers commercial support for Longhorn as part of its Rancher Prime subscription, and that is the only realistic answer for an organisation that needs someone accountable when a volume will not attach at three in the morning.
What people use it 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
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The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about 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.
Cross-shopped
What people choose instead of Longhorn
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- LonghornvsPortworx
Portworx: Commercial support, synchronous metro DR and someone accountable, at a per-node licence cost
- LonghornvsMinIO
MinIO: If the requirement is object storage for applications rather than block volumes for pods
Pricing
What Longhorn costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Longhorn
Free
- Apache 2.0 licensed, no licence fee
- Community support via GitHub and Slack only
- No vendor SLA or escalation path
- Commercial support available separately through SUSE Rancher Prime
Capabilities
Features
Per-volume controllers
Each volume gets its own controller, so a failure is contained rather than cluster-wide
Synchronous replication
Volume replicas kept in sync across nodes for node-failure survival
Snapshots and backups
Point-in-time snapshots and incremental backups to S3-compatible storage or NFS
Volume expansion
Online expansion of persistent volume claims without downtime
Disaster recovery volumes
Standby volumes in a second cluster restored from a backup target
Web interface
Built-in user interface for volume, replica and backup management
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
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.
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.
Is it suitable for production databases?
For modest workloads yes, but synchronous replication adds write latency and high-transaction databases usually want something faster.
Keep looking
Where to go from Longhorn
- Longhorn alternativesEvery product people weigh against it
- Longhorn pricingPlans, floors and what the tiers exclude
- Longhorn badgesWhich rules it meets, and the figure behind each
- All Cloud softwareThe full category
- Best Cloud softwareThe shortlist, and how it was cut
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Compare Longhorn with
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- OpenEBS
- Proxmox VE
- Anyscale
- Go
- Rancher
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Softwr does not host reviews and shows no star rating for Longhorn, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
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Longhorn badge
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