EU uptime monitoring tools

What to look for when choosing an uptime monitoring service that keeps your data in Europe.

Most uptime monitoring services were built in the US and run on US infrastructure. That's fine for many teams, but for companies operating under GDPR — or with internal data residency requirements — it creates a compliance burden. Your monitoring data contains endpoint URLs, response bodies, and request timings that can be sensitive.

This page explains what "EU-hosted monitoring" actually means in practice and what to verify before committing to a tool.

What EU-hosted actually means

"EU-hosted" can mean different things depending on the vendor. Before trusting a claim, it's worth asking more specific questions:

Where is your data stored? The database holding your monitor configuration, check results, and incident history should sit in the EU — not just the web server.
Where do checks originate? HTTP checks are sent from specific server locations. If checks come from US datacentres, your endpoint is being contacted by US infrastructure on a recurring schedule.
Which cloud provider is used? A tool claiming "EU hosting" but running on AWS us-east-1 behind the scenes doesn't meet most data residency requirements. Look for specific EU regions (eu-central-1, eu-west-1, etc.) and confirm the provider isn't subject to US CLOUD Act jurisdiction in a way that affects your data.
Where is the company incorporated? A US-incorporated company operating EU servers can still be compelled to hand over data under US law. An EU-incorporated company operating EU infrastructure gives you stronger guarantees.
Who are the subprocessors? Even an EU-based tool may use US services for email delivery, analytics, or support. A published subprocessor list is the sign of a vendor that takes data residency seriously.

Key features to compare

Beyond data residency, uptime monitoring tools differ significantly in what they can monitor and how they alert. When evaluating options:

Uptime monitoring HTTP/HTTPS checks at configurable intervals. Look for confirmation logic — tools that alert on the first failure produce too much noise.

Cron monitoring Heartbeat-based monitoring for scheduled jobs. Not all uptime tools offer this — it's a separate product category for some vendors.

SSL monitoring Alerts before certificates expire. Should be included in uptime checks automatically, not a paid add-on.

Check locations EU-based tools should check from EU locations. Multi-region checks reduce false positives caused by regional network issues.

Alert channels Slack, email, and webhooks at minimum. More channels means the tool fits into your existing workflow rather than requiring you to adapt.

Status pages Public incident pages let you communicate outages to customers without manual updates. Look for pages that reflect the real monitor status automatically.

DPA availability A Data Processing Agreement should be available without contacting sales. This is a basic requirement for GDPR compliance.

Red flags to watch for

"GDPR compliant" without a subprocessor list — compliance claims without transparency are meaningless
EU checks as a paid upgrade — check location shouldn't be a premium feature for EU teams
No DPA, or DPA only available on enterprise plans
US company with EU servers but no SCCs or adequacy mechanism documented
Vague data residency guarantees in marketing copy with no technical specifics

How WatchCat approaches this

WatchCat is built specifically for teams that need monitoring data to stay in Europe. Checks originate from EU locations, data is stored on EU infrastructure, and the company is EU-incorporated. The subprocessor list is public and a DPA is available to all customers without a sales call.

Both uptime and cron monitoring are included in every plan. SSL monitoring is part of every uptime check. Status pages, Slack, Discord, Telegram, Google Chat, email, and webhook integrations are available on all plans. See the security page for the full list of security measures and technical controls.

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