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Networking · head to head

Eclipse Mosquitto vs Tailscale

Eclipse Mosquitto logo

Eclipse Mosquitto

Networking

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

From
Free
Rated
-
Full reviewWebsite
Tailscale logo

Tailscale

Networking

Zero-trust mesh VPN built on WireGuard with identity-based access

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Tailscale requires active configuration and management; cannot be deployed passively like consumer VPNs
  • Prices and features above were last checked on 31 August 2026.

Where they differ

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

Attributes where Eclipse Mosquitto and Tailscale differ
AttributeEclipse MosquittoTailscale
Pricing modelOpen source, no licence feefreemium
PlatformsLinux, Windows, macOS, DockerLinux, macOS, Windows, iOS, Android, API, Web

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Networking).

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 Eclipse Mosquitto

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

Only in Tailscale

Nothing recorded that Eclipse Mosquitto does not also cover.

What people use each for

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

Eclipse Mosquitto

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

Tailscale

  • Remote team access to internal services without VPN concentratorsnot Eclipse Mosquitto
  • Hybrid cloud connectivity across AWS, Azure, GCP, and on-premises networksnot Eclipse Mosquitto
  • CI/CD pipeline access to internal infrastructure (databases, Kubernetes clusters)not Eclipse Mosquitto
  • Zero-trust access to SSH, Kubernetes, and databases without bastion hostsnot Eclipse Mosquitto
  • Mobile and IoT device management in enterprise environmentsnot Eclipse Mosquitto
  • Temporary contractor and third-party access controlnot Eclipse Mosquitto

Where each one falls short

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

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.

Tailscale

  • Requires active configuration and management; cannot be deployed passively like consumer VPNs
  • Device posture policies and JIT access tiers are locked behind Premium subscription (£18/month), raising per-user costs for enterprises
  • Limited support for legacy protocols and non-modern operating systems (Windows 7, older Android versions)
  • Centralised control plane operated by Tailscale (hosted in US); no self-hosted control plane option for air-gapped or sovereign deployments
  • Cannot replace full VPN functionality for accessing legacy IP-based services; only applicable to modern infrastructure

Pricing, plan by plan

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

Tailscale

Free
  • PersonalFree
    • Up to 6 users
    • Unlimited devices per user
    • 1,000 ephemeral resource minutes per month
  • Standard$8/month
    • Unlimited users
    • Unlimited devices
    • 1,000 ephemeral resource minutes per month
  • Premium$18/month
    • Unlimited users and devices
    • 10,000 ephemeral resource minutes per month
    • 300 ACL groups
  • EnterpriseFree
    • Custom pricing
    • Unlimited resources
    • Advanced security features

Which should you pick?

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

Choose Tailscale if

  • You want to start without paying.
  • You work on Linux, macOS, Windows, iOS, Android, API, Web.
Tailscale review

Questions people ask

Is Eclipse Mosquitto or Tailscale better?
Neither clearly leads. Eclipse Mosquitto starts at Free and Tailscale at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Eclipse Mosquitto or Tailscale?
Eclipse Mosquitto starts at Free and Tailscale at Free.
Does Eclipse Mosquitto or Tailscale run on more platforms?
Eclipse Mosquitto runs on Linux, Windows, macOS, Docker. Tailscale runs on Linux, macOS, Windows, iOS, Android, API, Web.
Can I use Eclipse Mosquitto for free?
Both have a free tier, so you can try either at no cost before committing.
What is Eclipse Mosquitto best used for?
Eclipse Mosquitto is most often used for a home or building automation stack where the broker must run on the same small computer as everything else, an industrial gateway that buffers local telemetry and bridges selected topics to a cloud broker, local development and testing of mqtt clients without provisioning a cloud iot service, an air-gapped deployment where a broker with no licence server and no phone-home behaviour is a requirement. Of those, a home or building automation stack where the broker must run on the same small computer as everything else and an industrial gateway that buffers local telemetry and bridges selected topics to a cloud broker are not what Tailscale is typically brought in for.
What can Eclipse Mosquitto do that Tailscale cannot?
Eclipse Mosquitto covers MQTT 5.0 support, Very small footprint, Bridging, WebSockets listener.

Answered from the vendors’ own pages

Eclipse Mosquitto: Can Mosquitto be clustered?

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

Tailscale: Is Tailscale free?

Tailscale Personal tier is free forever for up to 6 users. Standard (£8/month per user) adds team features, Premium (£18/month per user) adds security controls, and Enterprise tiers are custom priced.

Source
Eclipse Mosquitto: What licence is it?

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

Tailscale: Does Tailscale route all traffic through a central gateway?

No. Tailscale creates direct encrypted connections between devices using WireGuard. It only proxies traffic when direct peer connections are not possible (some restrictive NAT scenarios). This reduces latency and eliminates VPN gateway bottlenecks.

Source
Eclipse Mosquitto: How many clients can it handle?

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

Tailscale: Can I host Tailscale on-premises?

No. Tailscale provides a hosted control plane only. For fully self-hosted mesh networking, consider WireGuard with manual key management or Netmaker. Tailscale Enterprise can provide custom deployments for specific requirements.

Source
Eclipse Mosquitto: Does it support MQTT 5?

Yes, along with 3.1.1 and 3.1.

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