EU Sovereignty Score
Self-hosted / open sourceCDN, DNS & DomainsHeadquarters: CZ

Knot Resolver: sovereignty score and 8 European alternatives

Knot Resolver is an open-source caching recursive DNS resolver. Its core is written in C and LuaJIT and kept small; additional features are optional modules that you can extend in C or Lua. The software supports DNSSEC validation and DNS privacy features and, according to its developers, scales from large resolver farms down to home routers. It is software you run yourself: you install it from a Linux distribution package or from source on your own servers, and it is not a hosted service.

Knot Resolver is developed by CZ.NIC, the Czech non-profit association based in Prague that operates the .cz domain registry. The source code is freely available under a GPL licence and can therefore be inspected. Because you run the resolver yourself, you decide where queries and cache data are processed; there is no vendor storing data in another jurisdiction. For a European organisation that wants to keep DNS resolution under its own control, this is an option with no foreign owner.

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Sovereignty score
94 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-2100
    Headquartered in the EU: European law applies
  • Data residency SOV-3100
    EU-only hosting
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-6100
    Source code auditable, forkable and self-hostable

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 4, 2026
HeadquartersCZ (EU)Verified by hand
Sovereignty modelOpen-source, distributedVerified by hand
Data hostingEUVerified by hand
Open-sourceYesVerified by hand
GDPR-compliantYesVendor-stated
CategoryCDN, DNS & Domains
TypeProduct
Websiteknot-resolver.cz ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Knot Resolver

The European alternatives to Knot Resolver come from our knowledge base of over 6,200 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

14 European CDN, DNS & Domains vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with Knot Resolver

Knot Resolver is headquartered in CZ and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data.

Data is hosted exclusively in the EU, so Knot Resolver scores best on data residency.

Knot Resolver is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Knot Resolver together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Knot Resolver?

It depends on your use case. Strong EU alternatives to Knot Resolver include Bunny.net, ClouDNS and deSEC. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Knot Resolver?

Yes. Open-source EU alternatives to Knot Resolver include deSEC and Knot DNS. These keep your data fully under your own control and let you self-host if you want to.

Is Knot Resolver GDPR-compliant and where is the data hosted?

Knot Resolver is headquartered in CZ (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Knot Resolver an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 4, 2026.

Sources

Public sources used in the latest check of this record.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in CDN, DNS & Domains

CDN, DNS & Domains: Content delivery networks, DNS services and domain registration. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

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8 European alternatives to Knot Resolver — GDPR-compliant & EU-hosted · EU Sovereignty Score