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Networking · head to head

Nebula vs ngrok

Nebula logo

Nebula

Networking

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

From
Free
Rated
-
Full reviewWebsite
ngrok logo

ngrok

Networking

Reverse tunnel service that gives a local or private service a public URL without opening a firewall

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.; ngrok free HTTP endpoints show a browser interstitial before the page loads, which breaks first impressions in demos and confuses anyone you send the link to.
  • They diverge on capability: Nebula covers Certificate carried identity, ngrok covers Outbound agent tunnels.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Nebula and ngrok actually diverge.

Attributes where Nebula and ngrok differ
AttributeNebulangrok
Pricing modelOpen source, no licence feePer user per month
PlatformsLinux, macOS, Windows, iOS, Android, FreeBSDLinux, macOS, Windows, Docker, Kubernetes

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 Nebula

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

Only in ngrok

  • Outbound agent tunnels
  • Static domains
  • Traffic policy
  • Request inspection
  • Kubernetes ingress
  • TCP and TLS endpoints

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 ngrok
  • Very large fleets where a central policy service on the connection path is unacceptablenot ngrok
  • Environments that already run an internal certificate authority and want the network to use itnot ngrok
  • Replacing per host iptables rules with policy written against roles that follow the hostnot ngrok

ngrok

  • Receiving webhooks from a payment or messaging provider on a laptop during developmentnot Nebula
  • Demonstrating a work in progress application to someone outside the network without deploying itnot Nebula
  • Publishing a service inside a private network or Kubernetes cluster without a public load balancernot Nebula
  • Giving a partner a temporary authenticated endpoint into an internal APInot 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.

ngrok

  • Free HTTP endpoints show a browser interstitial before the page loads, which breaks first impressions in demos and confuses anyone you send the link to.
  • All traffic passes through ngrok infrastructure, so you inherit its latency and an ngrok incident takes every published endpoint down at once with no local failover.
  • Pricing is per user seat plus allowances, so a platform team publishing many endpoints ends up buying seats for people who never open the dashboard.
  • Bandwidth is metered on paid tiers, so a workload that quietly grows into serving real traffic produces overage rather than a flat bill.
  • Traffic policy configuration is specific to ngrok, so the authentication and routing logic you accumulate at the edge has to be rebuilt if you later move to a conventional ingress.

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

ngrok

Free
  • FreeFree
    • One static domain
    • HTTP endpoints with a browser interstitial
    • Limited simultaneous connections
  • Personal$undefined/month
    • Removes the interstitial warning page
    • Additional reserved domains
    • TCP endpoints
  • Pro$undefined/month
    • Per user billing with team accounts
    • Traffic policy rules and edge authentication
    • Higher bandwidth allowances
  • Enterprise$undefined/year
    • Custom terms and volume pricing
    • Dedicated capacity options
    • Compliance and audit requirements

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 ngrok if

  • You need outbound agent tunnels.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker, Kubernetes.
  • You also want static domains.
ngrok review

Questions people ask

Is Nebula or ngrok better?
Neither clearly leads. Nebula starts at Free and ngrok at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nebula or ngrok?
Nebula starts at Free and ngrok at Free.
Does Nebula or ngrok run on more platforms?
Nebula runs on Linux, macOS, Windows, iOS, Android, FreeBSD. ngrok runs on Linux, macOS, Windows, Docker, Kubernetes.
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 ngrok is typically brought in for.
What can Nebula do that ngrok cannot?
Nebula covers Certificate carried identity, Group based host firewall, Lighthouse discovery, Noise protocol encryption. ngrok covers Outbound agent tunnels, Static domains, Traffic policy, Request inspection.

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.

ngrok: Can I use it in production?

It is sold for that now, with static domains, policy rules and a Kubernetes operator. The question is whether you accept a third party on the traffic path for every request.

Nebula: Can I run it without Defined Networking?

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

ngrok: Why does my free URL show a warning page?

Free HTTP endpoints carry an interstitial. Removing it requires a paid plan, and it is the most common reason people upgrade.

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.

ngrok: Does it work for SSH or a database?

Yes through TCP endpoints, which are a paid feature.

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.

ngrok: What is the self hosted alternative?

A reverse proxy on a server you own with a tunnel back to the service, or one of the self hosted tunnel projects. All of them cost more setup time than the thing they replace.

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