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Cybersecurity · head to head

Metasploit vs Nebula

Metasploit logo

Metasploit

Cybersecurity

The world's most used penetration testing framework

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: Metasploit the free Framework edition is command line only; the web interface is Pro only; 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: Metasploit covers Exploit database, Nebula covers Certificate carried identity.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Metasploit and Nebula actually diverge.

Attributes where Metasploit and Nebula differ
AttributeMetasploitNebula
Pricing modelfreemiumOpen source, no licence fee
PlatformsDesktop, CliLinux, macOS, Windows, iOS, Android, FreeBSD
CategoryCybersecurityNetworking
Founded2000Unknown

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 Metasploit

  • Exploit database
  • Payload generation
  • Post-exploitation
  • Evasion modules
  • Auxiliary scanners
  • Social engineering
  • Credential harvesting
  • Session management

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.

Metasploit

  • Penetration testing and exploit development against known vulnerabilitiesnot Nebula
  • Validating whether a reported vulnerability is actually exploitablenot Nebula
  • Running phishing and credential attack simulations on the Pro editionnot Nebula

Nebula

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

Where each one falls short

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

Metasploit

  • The free Framework edition is command line only; the web interface is Pro only
  • Automated exploitation, automated credential attacks and antivirus evading dynamic payloads are restricted to Metasploit Pro
  • Reporting, audit wizards, task chains and closed loop vulnerability validation are Pro only
  • Rapid7 publishes no price for Metasploit Pro and routes buyers to contact sales

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

Metasploit

Free
  • Metasploit Framework (OSS)Free
    • Open source
    • 1500+ exploits
    • Command line
  • Metasploit ProFree
    • Web interface
    • Automated testing
    • Phishing campaigns

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 Metasploit if

  • You need exploit database.
  • You want to start without paying.
  • You work on Desktop, Cli.
  • You also want payload generation.
Metasploit 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 Metasploit or Nebula better?
Neither clearly leads. Metasploit 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, Metasploit or Nebula?
Metasploit starts at Free and Nebula at Free.
Does Metasploit or Nebula run on more platforms?
Metasploit runs on Desktop, Cli. Nebula runs on Linux, macOS, Windows, iOS, Android, FreeBSD.
Can I use Metasploit for free?
Both have a free tier, so you can try either at no cost before committing.
What is Metasploit best used for?
Metasploit is most often used for penetration testing and exploit development against known vulnerabilities, validating whether a reported vulnerability is actually exploitable, running phishing and credential attack simulations on the pro edition. Of those, penetration testing and exploit development against known vulnerabilities and validating whether a reported vulnerability is actually exploitable are not what Nebula is typically brought in for.
What can Metasploit do that Nebula cannot?
Metasploit covers Exploit database, Payload generation, Post-exploitation, Evasion modules. Nebula covers Certificate carried identity, Group based host firewall, Lighthouse discovery, Noise protocol encryption.

Answered from the vendors’ own pages

Metasploit: Is Metasploit Framework free to use?

Yes, Metasploit Framework is available as free open-source software with source code accessible via GitHub. Community support is provided through Slack, GitHub, Twitter, and email.

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.

Metasploit: What is the difference between Metasploit Framework and Metasploit Pro?

Metasploit Framework is the free open-source version. Metasploit Pro is a commercial offering with customer support from Rapid7, though specific pricing and features are not detailed on the download page.

Source
Nebula: Can I run it without Defined Networking?

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

Metasploit: What support is available for the free Framework version?

Community-based support for Metasploit Framework is available through Slack, GitHub, Twitter, and email ([email protected]). Commercial customers using Metasploit Pro receive customer support from Rapid7.

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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