EU Sovereignty Score
Self-hosted / open sourceDNS Privacy & FilteringHeadquarters: DE

Blocky: sovereignty score and 8 European alternatives

Blocky is a DNS proxy and ad blocker for the local network, written in Go. It sits between client devices and upstream resolvers and filters queries using external ad and malware lists, with allowlists, regular expressions and per-group rules. It also offers custom answers for specific domains, conditional forwarding, caching with prefetching, DoH, DoT, DoQ and DoH3, its own DoH endpoint and DNSSEC validation of upstream resolvers. It provides Prometheus metrics, query logging to CSV or SQL, a REST API and a CLI. Configuration is in YAML; no database is needed.

Blocky is free open-source software under the Apache-2.0 licence and, according to the project page, is maintained in the developer's spare time. You host it yourself, as a single binary, a Docker image or a community-supported Helm chart, including on a Raspberry Pi or OpenWrt router. DNS queries and logs therefore stay on your own infrastructure, while your chosen upstream resolvers determine where forwarded queries end up. According to the project, Blocky collects no telemetry. No commercial vendor stands behind it.

See the 8 European alternatives ↓Assess your stack with Blocky pre-selected
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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 1, 2026
HeadquartersDE (EU)Verified by hand
Sovereignty modelOpen-source, distributedVerified by hand
Data hostingEUVerified by hand
Open-sourceYesVerified by hand
GDPR-compliantYesVendor-stated
Hosting signalFASTLY - Fastly, Inc., US (US)Technically measured
CategoryDNS Privacy & Filtering
TypeProduct
Website0xerr0r.github.io ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Blocky

The European alternatives to Blocky 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

24 European DNS Privacy & Filtering 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 Blocky

Blocky is headquartered in DE 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 Blocky scores best on data residency.

Blocky 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 Blocky 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 Blocky?

It depends on your use case. Strong EU alternatives to Blocky include AdGuard DNS, AdGuard Home and Blokada. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Blocky?

Yes. Open-source EU alternatives to Blocky include AdGuard Home. These keep your data fully under your own control and let you self-host if you want to.

Is Blocky GDPR-compliant and where is the data hosted?

Blocky is headquartered in DE (EU) and hosts data in EU. It is also open-source, so you can self-host it. That makes Blocky 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 1, 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 DNS Privacy & Filtering

DNS Privacy & Filtering: Privacy-friendly DNS services, ad blocking and DNS filtering. 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 Blocky — GDPR-compliant & EU-hosted · EU Sovereignty Score