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Ansible vs Nebula

Ansible logo

Ansible

Developer Tools

Simple, agentless IT automation

From
Free
Rated
-
Full reviewWebsite
Nebula logo

Nebula

Networking

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Ansible the open source project gives the engine and the language; the automation controller, automation mesh, automation hub, analytics and governance all belong to the paid Red Hat Ansible Automation Platform; 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.
  • They diverge on capability: Ansible covers Playbooks, Nebula covers Certificate carried identity.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Ansible and Nebula actually diverge.

Attributes where Ansible and Nebula differ
AttributeAnsibleNebula
Pricing modelopen-sourceOpen source, no licence fee
PlatformsLinux, Windows, Mac, ApiLinux, macOS, Windows, iOS, Android, FreeBSD
CategoryDeveloper ToolsNetworking
Founded2012Unknown

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 Ansible

  • Playbooks
  • Inventory management
  • Module library
  • Variables and templating
  • Handlers
  • Roles
  • Async tasks
  • Plugins

Only in Nebula

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

What people use each for

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

Ansible

  • Configuration managementnot Nebula
  • Server provisioningnot Nebula
  • Application deploymentnot Nebula
  • Multi-node managementnot Nebula
  • Orchestrationnot Nebula

Nebula

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

Where each one falls short

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

Ansible

  • The open source project gives the engine and the language; the automation controller, automation mesh, automation hub, analytics and governance all belong to the paid Red Hat Ansible Automation Platform
  • Event-Driven Ansible and the AI coding assistant are platform features rather than open source ones
  • Red Hat does not publish platform pricing
  • Running open source Ansible at scale means building the control plane the platform otherwise provides

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.

Pricing, plan by plan

Ansible

Free
  • Open SourceFree
    • Community edition
    • Unlimited nodes
    • Full functionality
  • Ansible Automation Platform$5000/year
    • Enterprise support
    • Ansible Tower
    • Advanced features

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

Which should you pick?

Choose Ansible if

  • You need playbooks.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Api.
  • You also want inventory management.
Ansible review

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

Questions people ask

Is Ansible or Nebula better?
Neither clearly leads. Ansible starts at Free and Nebula at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Ansible or Nebula?
Ansible starts at Free and Nebula at Free.
Does Ansible or Nebula run on more platforms?
Ansible runs on Linux, Windows, Mac, Api. Nebula runs on Linux, macOS, Windows, iOS, Android, FreeBSD.
Can I use Ansible for free?
Both have a free tier, so you can try either at no cost before committing.
What is Ansible best used for?
Ansible is most often used for configuration management, server provisioning, application deployment, multi-node management. Of those, configuration management and server provisioning are not what Nebula is typically brought in for.
What can Ansible do that Nebula cannot?
Ansible covers Playbooks, Inventory management, Module library, Variables and templating. Nebula covers Certificate carried identity, Group based host firewall, Lighthouse discovery, Noise protocol encryption.

Answered from the vendors’ own pages

Ansible: Is Ansible free for commercial use?

Ansible Collaborative is open source. The page describes it as 'an open source IT automation engine' and does not impose restrictions on commercial use for the open source version.

Source
Nebula: Does it use WireGuard?

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

Ansible: What is the difference between open source Ansible and the commercial alternative?

The page references Red Hat Ansible Automation Platform as an enterprise alternative to Ansible Collaborative, but does not disclose specific differences, pricing, or feature comparisons between the two offerings.

Source
Nebula: Can I run it without Defined Networking?

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

Ansible: Is there paid support available for Ansible?

The page does not disclose whether paid support contracts are available for open source Ansible or whether Red Hat offers support plans for their enterprise Ansible Automation Platform.

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.

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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