EU sovereignNetwork & MonitoringHeadquarters: BE

Oh Dear: sovereignty score and 8 European alternatives

Oh Dear is a website monitoring service. It checks uptime from multiple locations, monitors SSL certificates and domains, detects broken links and mixed content, supervises cron jobs, and runs performance and Lighthouse-based SEO checks. It also includes a port scanner, branded status pages and automated client reports. Alerts are delivered by email, Slack, Microsoft Teams, PagerDuty, Opsgenie or webhook. Oh Dear is delivered as SaaS.

Oh Dear started in 2018 and is built and maintained by Freek Van der Herten and Mattias Geniar. According to its security page, primary hosting is with Combell in Belgium. Performance metrics are stored in ClickHouse Cloud, Cloudflare provides CDN and protection, and monitoring nodes run on AWS, DigitalOcean and Vultr; locations are not stated for these providers. Oh Dear offers a GDPR data processing agreement with EU standard contractual clauses and publishes a list of subprocessors. The service is not described as open source. European organisations should review the subprocessor list, because several of the named providers do not state their locations.

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Sovereignty score

71 / 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-360
Key management with a European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-655
Closed source, runtime with the vendor

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 September 8, 2026

Headquarters	BE (EU)Verified by hand
Sovereignty model	Vendor-hosted (EU)Verified by hand
Data hosting	EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Compliance documents	4 published, see belowVendor-stated
Hosting signal	CLOUDFLARENET - Cloudflare, Inc., US (US)Technically measured
Category	Network & Monitoring
Type	Product
Website	ohdear.app ↗

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 Oh Dear

The European alternatives to Oh Dear come from our knowledge base of over 6,800 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

41 European Network & Monitoring 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 Oh Dear

Oh Dear is headquartered in BE 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 Oh Dear scores best on data residency.

Oh Dear is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Oh Dear 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 Oh Dear?

It depends on your use case. Strong EU alternatives to Oh Dear include Centreon, Checkmk and collectd. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Oh Dear?

Yes. Open-source EU alternatives to Oh Dear include Centreon, Checkmk, collectd and Healthchecks.io. These keep your data fully under your own control and let you self-host if you want to.

Is Oh Dear GDPR-compliant and where is the data hosted?

Oh Dear is headquartered in BE (EU) and hosts data in EU. That makes Oh Dear 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 September 8, 2026.

Sources

This record was checked via the vendor's website and legal notice when it was added on September 8, 2026. Source links have been recorded per record since 20 September 2026.

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".

Data Processing Agreement (DPA): ohdear.app/privacy
Subprocessor list: ohdear.app/privacy
Security page / trust center: ohdear.app/security
EU hosting documented: ohdear.app/security

Provenance of the links above:Vendor-stated

Links checked on September 22, 2026.

Digital sovereignty in Network & Monitoring

Network & Monitoring: Network monitoring, infrastructure monitoring, log management and observability. 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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