Cloud · head to head
HAProxy vs Longhorn
Longhorn
Cloud
Open source distributed block storage for Kubernetes, incubating at the CNCF
- From
- Free
- Rated
- -
The short version
- Each has a real cost: HAProxy configuration syntax is dense and unforgiving, with a steep initial learning curve; 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.
- They diverge on capability: HAProxy covers High throughput, Longhorn covers Per-volume controllers.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which HAProxy and Longhorn actually diverge.
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated), category (Cloud).
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 HAProxy
- High throughput
- Layer 4 and 7
- Health checking
- Rate limiting and ACLs
Only in Longhorn
- Per-volume controllers
- Synchronous replication
- Snapshots and backups
- Volume expansion
- Disaster recovery volumes
- Web interface
What people use each for
The jobs each tool is most often brought in to do.
HAProxy
- Load balancing at traffic levels where proxy efficiency shows up in the hardware billnot Longhorn
- Precise traffic control — rate limits, sticky sessions, complex routing rulesnot Longhorn
- TCP load balancing for databases and non-HTTP servicesnot Longhorn
Longhorn
- An on-premises Kubernetes cluster with local disks and no SAN that needs replicated persistent volumesnot HAProxy
- Edge sites where shipping a storage array is impractical and three nodes is the whole clusternot HAProxy
- A K3s deployment where the storage layer must be light enough to run alongside the workloadsnot HAProxy
- A team that wants snapshots and S3 backups of persistent volumes without paying per-node storage licencesnot HAProxy
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
HAProxy
- Configuration syntax is dense and unforgiving, with a steep initial learning curve
- No automatic certificate management, unlike newer servers that treat it as default behaviour
- The built-in stats page is basic, so real observability needs exporters and dashboards
- A dedicated load balancer is more machinery than small deployments need
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.
Pricing, plan by plan
HAProxy
Free- HAProxyFree
- Full functionality
- No usage limits
- Community support
Longhorn
Free- LonghornFree
- Apache 2.0 licensed, no licence fee
- Community support via GitHub and Slack only
- No vendor SLA or escalation path
Which should you pick?
Choose HAProxy if
- You need high throughput.
- You want to start without paying.
- You work on Linux, Docker, Kubernetes, Self-hosted.
- You also want layer 4 and 7.
Choose Longhorn if
- You need per-volume controllers.
- You want to start without paying.
- You work on Linux, Kubernetes.
- You also want synchronous replication.
Questions people ask
- Is HAProxy or Longhorn better?
- Neither clearly leads. HAProxy starts at Free and Longhorn at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, HAProxy or Longhorn?
- HAProxy starts at Free and Longhorn at Free.
- Does HAProxy or Longhorn run on more platforms?
- HAProxy runs on Linux, Docker, Kubernetes, Self-hosted. Longhorn runs on Linux, Kubernetes.
- Can I use HAProxy for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is HAProxy best used for?
- HAProxy is most often used for load balancing at traffic levels where proxy efficiency shows up in the hardware bill, precise traffic control — rate limits, sticky sessions, complex routing rules, tcp load balancing for databases and non-http services. Of those, load balancing at traffic levels where proxy efficiency shows up in the hardware bill and precise traffic control — rate limits, sticky sessions, complex routing rules are not what Longhorn is typically brought in for.
- What can HAProxy do that Longhorn cannot?
- HAProxy covers High throughput, Layer 4 and 7, Health checking, Rate limiting and ACLs. Longhorn covers Per-volume controllers, Synchronous replication, Snapshots and backups, Volume expansion.
Answered from the vendors’ own pages
HAProxy: Is HAProxy free?
Yes, the community version is open source. HAProxy Technologies sells HAProxy Enterprise separately.
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.
HAProxy: HAProxy or Nginx?
HAProxy is a specialist load balancer with deeper balancing and health-check features. Nginx also serves static content and is more approachable, which is why it is more common as a general web server.
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.
HAProxy: Does HAProxy handle TLS certificates automatically?
No. Certificate issuance and renewal are external, unlike Caddy where it is automatic.
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.
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