License

Free at home. A key for more.

kudurru is source-available under the PolyForm Noncommercial License 1.0.0. Personal use is free: a homelab, a house, study, a hobby, a charity or a school. A business needs an agreement, including for the parts that need no key.

DNS never depends on a key. Queries are answered the same with a key, with none and with an expired one. A key only changes the number of nodes, the number of policies and the features listed below.
A node without a key is a supported way to run. One node, the default policy, the resolver, the blocking engine, zones, the block page and the dashboard.
Keys are checked on the node. A signature check, no license server, no phone home. An expired key keeps working for 30 days.

What each license includes

The free personal key covers up to 3 nodes for non-commercial use.
What	No key	Personal key (free)	Business key
DNS answering, blocking, zones, the block page, the dashboard, short-term statistics	Yes	Yes	Yes
Nodes in one cluster	1	Up to 3	As agreed
Policies	1, the default policy	Unlimited	Unlimited
Roles beyond the built-in administrator, zone-scoped roles, Kubernetes RBAC	No	Yes	Yes
OIDC single sign-on	No	Yes	Yes
The audit trail and its export	No	Yes	Yes
Long-term statistics (anything older than 24 hours)	No	Yes	Yes
Unblock requests from the block page	No	Yes	Yes
The dnsdist and keepalived edge	No	Yes	Yes
Integrations, such as the external-dns webhook	No	Yes	Yes
Use by a business	No	No	Yes

Request a key

What is it for? Personal or non-commercial: a home, a homelab, study, a hobby, a charity or a school. Free, up to 3 nodes. A business, or anything else. We reply by email.

Your name Email address

What do you run kudurru for? I agree and certify this key will only be used for personal, non-commercial use in accordance with the license (PolyForm Noncommercial License 1.0.0).

A personal request goes to our license server, which emails you a link to confirm your address. After you confirm, we review the request and email your key once it is approved. A business request is not sent anywhere: it opens an email to hello@kudurru.io with the subject Business License and your details filled in.

Get a key

The form needs JavaScript. Without it, write to us:

A free personal key. Write to hello@kudurru.io with the name to put on it and what you run it for. It covers up to 3 nodes and is for non-commercial use only.

A business. Write to hello@kudurru.io with the company, the number of nodes and the features you need. A business key comes with a commercial agreement.

Read the license

The license is the PolyForm Noncommercial License 1.0.0; the full text is on this site. The rules for people, what a key unlocks and what a missing key changes, are in the licensing page of the docs, and the docs carry the license text too. The source is in the repository (LICENSE and LICENSING.md).