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Cloud · head to head

kind vs Eclipse Mosquitto

kind logo

kind

Cloud

Run Kubernetes clusters inside Docker containers

From
Free
Rated
-
Full reviewWebsite
Eclipse Mosquitto logo

Eclipse Mosquitto

Networking

Small, EPL-licensed MQTT broker that runs on hardware other brokers cannot

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: kind requires Docker or Podman, so it inherits whatever container runtime limitations exist on the host; Eclipse Mosquitto there is no clustering: Mosquitto is a single process, so high availability means building your own failover and accepting session loss on switchover.
  • They diverge on capability: kind covers Nodes as containers, Eclipse Mosquitto covers MQTT 5.0 support.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which kind and Eclipse Mosquitto actually diverge.

Attributes where kind and Eclipse Mosquitto differ
AttributekindEclipse Mosquitto
PlatformsLinux, macOS, WindowsLinux, Windows, macOS, Docker
CategoryCloudNetworking

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 kind

  • Nodes as containers
  • Multi-node topologies
  • CI-friendly
  • Local image loading

Only in Eclipse Mosquitto

  • MQTT 5.0 support
  • Very small footprint
  • Bridging
  • WebSockets listener
  • Command line clients
  • Dynamic security plugin

What people use each for

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

kind

  • Spinning up and destroying a Kubernetes cluster inside a CI jobnot Eclipse Mosquitto
  • Testing controllers and operators against several Kubernetes versionsnot Eclipse Mosquitto
  • Local multi-node clusters without the memory cost of virtual machinesnot Eclipse Mosquitto

Eclipse Mosquitto

  • A home or building automation stack where the broker must run on the same small computer as everything elsenot kind
  • An industrial gateway that buffers local telemetry and bridges selected topics to a cloud brokernot kind
  • Local development and testing of MQTT clients without provisioning a cloud IoT servicenot kind
  • An air-gapped deployment where a broker with no licence server and no phone-home behaviour is a requirementnot kind

Where each one falls short

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

kind

  • Requires Docker or Podman, so it inherits whatever container runtime limitations exist on the host
  • Fewer conveniences than minikube: no addon system, so ingress and metrics need manual installation
  • Because nodes are containers sharing the host kernel, it is a weaker simulation of real node behaviour and storage

Eclipse Mosquitto

  • There is no clustering: Mosquitto is a single process, so high availability means building your own failover and accepting session loss on switchover.
  • Persistence is a local file rather than a replicated store, so a disk failure or an unclean shutdown can lose retained messages and queued QoS traffic.
  • Practical capacity is a few thousand concurrent clients on typical hardware, so a growing device fleet eventually forces a migration to a clustered broker.
  • The Eclipse Public Licence is weak copyleft rather than permissive, which some legal teams treat as a blocker when embedding the broker in a shipped commercial product.
  • There is no commercial support to buy from the project, so production incidents rely on community mailing lists or on paying a third party who happens to know the codebase.

Pricing, plan by plan

kind

Free
  • kindFree
    • Full functionality
    • No usage limits
    • Community support

Eclipse Mosquitto

Free
  • Eclipse MosquittoFree
    • Eclipse Public License 2.0 with Eclipse Distribution Licence
    • MQTT 5.0, 3.1.1 and 3.1
    • No client or message limits beyond your hardware

Which should you pick?

Choose kind if

  • You need nodes as containers.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want multi-node topologies.
kind review

Choose Eclipse Mosquitto if

  • You need mqtt 5.0 support.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, Docker.
  • You also want very small footprint.
Eclipse Mosquitto review

Questions people ask

Is kind or Eclipse Mosquitto better?
Neither clearly leads. kind starts at Free and Eclipse Mosquitto at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, kind or Eclipse Mosquitto?
kind starts at Free and Eclipse Mosquitto at Free.
Does kind or Eclipse Mosquitto run on more platforms?
kind runs on Linux, macOS, Windows. Eclipse Mosquitto runs on Linux, Windows, macOS, Docker.
Can I use kind for free?
Both have a free tier, so you can try either at no cost before committing.
What is kind best used for?
kind is most often used for spinning up and destroying a kubernetes cluster inside a ci job, testing controllers and operators against several kubernetes versions, local multi-node clusters without the memory cost of virtual machines. Of those, spinning up and destroying a kubernetes cluster inside a ci job and testing controllers and operators against several kubernetes versions are not what Eclipse Mosquitto is typically brought in for.
What can kind do that Eclipse Mosquitto cannot?
kind covers Nodes as containers, Multi-node topologies, CI-friendly, Local image loading. Eclipse Mosquitto covers MQTT 5.0 support, Very small footprint, Bridging, WebSockets listener.

Answered from the vendors’ own pages

kind: Is kind free?

Yes, open source and maintained under Kubernetes SIGs.

Eclipse Mosquitto: Can Mosquitto be clustered?

No. It is a single process. High availability requires an external failover arrangement you build yourself.

kind: Why run Kubernetes nodes as containers?

Speed and cost. A container node starts in seconds and uses far less memory than a virtual machine, which is what makes per-CI-run clusters realistic.

Eclipse Mosquitto: What licence is it?

Eclipse Public License 2.0 alongside the Eclipse Distribution License, a weak copyleft rather than a permissive licence.

kind: Is kind suitable for production?

No. It is a development and testing tool, and node isolation is weaker than real nodes because containers share the host kernel.

Eclipse Mosquitto: How many clients can it handle?

A few thousand concurrent connections on ordinary hardware; beyond that, use a clustered broker.

Eclipse Mosquitto: Does it support MQTT 5?

Yes, along with 3.1.1 and 3.1.

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