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Networking · head to head

Nebula vs Node-RED

Nebula logo

Nebula

Networking

Certificate based overlay network from Slack, with identity and firewall rules carried in the certificate

From
Free
Rated
-
Full reviewWebsite
Node-RED logo

Node-RED

Smart Home

Flow-based programming tool for IoT and home automation

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Nebula the open source project has no user interface, no enrolment workflow and no revocation service, so certificate issuing, distribution and expiry become scripts you write and then have to keep working.; Node-RED the Node-RED editor ships unsecured: anyone who can reach its IP address can open the editor and deploy changes until adminAuth is configured
  • They diverge on capability: Nebula covers Certificate carried identity, Node-RED covers Visual Editor.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Nebula and Node-RED actually diverge.

Attributes where Nebula and Node-RED differ
AttributeNebulaNode-RED
Pricing modelOpen source, no licence feeopen-source
PlatformsLinux, macOS, Windows, iOS, Android, FreeBSDNode.js, Docker, Cloud, Edge devices
CategoryNetworkingSmart Home
FoundedUnknown2013

Identical on both: starting price (Free), 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 Nebula

  • Certificate carried identity
  • Group based host firewall
  • Lighthouse discovery
  • Noise protocol encryption
  • Unsafe routes
  • Managed option

Only in Node-RED

  • Visual Editor
  • Flow-Based Programming
  • Extensible
  • HTTP Integration
  • MQTT
  • REST API
  • WebSocket
  • Database

What people use each for

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

Nebula

  • Flattening a network across several clouds and datacentres without VPC peering or route tablesnot Node-RED
  • Very large fleets where a central policy service on the connection path is unacceptablenot Node-RED
  • Environments that already run an internal certificate authority and want the network to use itnot Node-RED
  • Replacing per host iptables rules with policy written against roles that follow the hostnot Node-RED

Node-RED

  • Low-code event-driven application developmentnot Nebula
  • IoT and device integration workflowsnot Nebula
  • Visual programming for server-side integrationsnot Nebula

Where each one falls short

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

Nebula

  • The open source project has no user interface, no enrolment workflow and no revocation service, so certificate issuing, distribution and expiry become scripts you write and then have to keep working.
  • Revoking a compromised host means distributing a blocklist entry to every other host and reloading them, which is a fleet wide operation rather than a click, and easy to get wrong under pressure.
  • Changing a host group membership means reissuing and redeploying its certificate, so policy changes are a deployment rather than a configuration edit.
  • There is no identity provider integration or single sign on in the open source version, so it maps well to servers and badly to a fleet of user laptops.
  • NAT traversal is best effort and hosts behind symmetric NAT need a relay configured deliberately, so connectivity failures show up as intermittent rather than immediate and are awkward to diagnose.

Node-RED

  • The Node-RED editor ships unsecured: anyone who can reach its IP address can open the editor and deploy changes until adminAuth is configured
  • HTTPS is off by default and must be enabled through the https setting
  • HTTP endpoints and dashboards exposed by flows are unauthenticated unless httpNodeAuth is configured separately
  • All three security layers are optional additions the administrator must implement by editing the settings file

Pricing, plan by plan

Nebula

Free
  • NebulaFree
    • Full functionality under the MIT licence
    • No host limit
    • You operate the certificate authority and lighthouses
  • Defined Networking$undefined/month
    • Hosted control plane and enrolment
    • Managed certificate lifecycle and revocation
    • Policy and DNS interface

Node-RED

Free
  • Community EditionFree
    • Visual editor
    • Extensible
    • REST API

Which should you pick?

Choose Nebula if

  • You need certificate carried identity.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, iOS, Android, FreeBSD.
  • You also want group based host firewall.
Nebula review

Choose Node-RED if

  • You need visual editor.
  • You want to start without paying.
  • You work on Node.js, Docker, Cloud, Edge devices.
  • You also want flow-based programming.
Node-RED review

Questions people ask

Is Nebula or Node-RED better?
Neither clearly leads. Nebula starts at Free and Node-RED at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nebula or Node-RED?
Nebula starts at Free and Node-RED at Free.
Does Nebula or Node-RED run on more platforms?
Nebula runs on Linux, macOS, Windows, iOS, Android, FreeBSD. Node-RED runs on Node.js, Docker, Cloud, Edge devices.
Can I use Nebula for free?
Both have a free tier, so you can try either at no cost before committing.
What is Nebula best used for?
Nebula is most often used for flattening a network across several clouds and datacentres without vpc peering or route tables, very large fleets where a central policy service on the connection path is unacceptable, environments that already run an internal certificate authority and want the network to use it, replacing per host iptables rules with policy written against roles that follow the host. Of those, flattening a network across several clouds and datacentres without vpc peering or route tables and very large fleets where a central policy service on the connection path is unacceptable are not what Node-RED is typically brought in for.
What can Nebula do that Node-RED cannot?
Nebula covers Certificate carried identity, Group based host firewall, Lighthouse discovery, Noise protocol encryption. Node-RED covers Visual Editor, Flow-Based Programming, Extensible, HTTP Integration.

Answered from the vendors’ own pages

Nebula: Does it use WireGuard?

No. Nebula predates the common WireGuard mesh tools and uses the Noise protocol framework with its own certificate format.

Node-RED: Is Node-RED free?

Yes, Node-RED is completely free and open source. It is available under the MIT License through GitHub and npm package manager. The project is maintained by the OpenJS Foundation.

Source
Nebula: Can I run it without Defined Networking?

Yes, entirely. Defined Networking sells the control plane conveniences, not the network itself.

Node-RED: Does Node-RED offer commercial support?

Node-RED itself is free and community-supported. FlowFuse, Inc. was founded in 2021 as a separate commercial entity offering enterprise support and a professional platform for Node-RED deployment, but FlowFuse is not Node-RED.

Source
Nebula: How do I revoke a host?

Add its certificate fingerprint to the blocklist in the configuration of the other hosts and reload them. There is no online revocation check.

Node-RED: What is Node-RED pricing model?

Node-RED has no pricing model. It is completely free open source software. Commercial support and hosting options may be available separately through third-party providers like FlowFuse, but the core software is not sold.

Source
Nebula: Is it a good fit for laptops?

Less so than the identity provider based tools. There is no single sign on, so every laptop needs a certificate issued and renewed by whatever process you build.

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