Why consider EU-hosted uptime monitoring

Your monitoring database contains sensitive information about your infrastructure. Where it lives affects GDPR compliance, data sovereignty and operational risk.

What's in a monitoring database

Uptime monitoring holds sensitive data that people rarely think about:

A list of all your critical URLs and IP addresses.
Timestamps of outages with details of server responses.
Check configuration (custom headers, expected keywords, SSL details).
Escalation contacts - on-call phone numbers, Telegram chat IDs, webhook URLs.
Response logs - status code dumps, error strings, server IPs.

For an attacker this is a recon map of your infrastructure. For you it's a list of things you must not lose or unintentionally exfiltrate.

Schrems II and US services

Since 2020 (the Schrems II ruling of the Court of Justice of the EU), the transfer of personal data to the US is not covered by the standard EU-US Privacy Shield agreement. For GDPR-compliant operation this means using a US monitoring service requires:

A proper analysis of why you are transferring data to a third country.
Standard Contractual Clauses (SCCs) with the US provider.
Supplementary measures - typically encryption at rest and in transit.
DPIA (Data Protection Impact Assessment) for sensitive data.

In practice no one does this. Most European companies use UptimeRobot or Pingdom despite the fact that their monitoring contains URLs of production systems and contacts for on-call engineers. It becomes visible at the first serious GDPR audit.

Second reason: US CLOUD Act

Regardless of GDPR, the US has a valid CLOUD Act from 2018. It allows US authorities to request data from US companies without the data owner's knowledge and regardless of whether the data is stored in the US or another region (including EU datacenters of US companies).

This means even Pingdom EU region is equivalent to a US region from the CLOUD Act perspective if it's a US company. Jurisdiction follows company ownership, not the physical server location.

Third reason: operational risk

US services charge in USD. With a strong dollar you pay more, with a weak one less - the exchange rate matters to you every month. EU providers charge in EUR.

Plus: when you have a problem, support speaks English with a 6-9 hour time difference. EU providers can respond in Slovak, Czech or German within business hours.

ePulz.io in a nutshell

ePulz.io is uptime monitoring hosted in Slovakia. Specifically what it supports today:

Monitor types: - HTTP / HTTPS (with timing breakdown - DNS, connect, TLS, TTFB, download) - SSL certificates (expiry, issuer, chain) - TCP port - ICMP ping - DNS records (A, AAAA, MX, TXT, CNAME, NS) - Domain expiry (WHOIS) - Heartbeat (for cron jobs and background processes) - Visual regression (screenshot diff) - LAN monitors (via pull-agent in your network)

Notifications: - Email (via SMTP) - Telegram (per-user linking, plus admin channel) - Webhook (global and per-monitor override)

Other features: - Public status pages - Multi-region consensus voting (architecture in code, threshold configurable) - Worker bundle generator for self-hosting additional region checkers - 14-language UI (sk, cs, en, de, pl, hu, fr, es, it, pt, nl, ru, uk, tr) - 7 free public tools (SSL, headers, DNS, WHOIS, IP geo, DNS propagation, my-IP)

Pricing (verified 06/2026): - Trial: 7 days, 3 monitors, free, no credit card - Štandard: 4 €/mo, 15 monitors, 5-min interval, 30 days history - Profi: 9 €/mo, 25 monitors, 2-min interval, 90 days history - Business: 27 €/mo, 100 monitors, 1-min interval, 365 days history, visual regression

Hosted in Slovakia, data does not leave the EU.

When a US service is fine

Let's be honest - GDPR has nuances. If you monitor:

Static websites without personal data (blog, marketing).
APIs that don't have customer data in URLs or headers.
Internal team tools where the whole team runs in the US.

A US service is fine - GDPR doesn't apply.

If you monitor:

Healthcare, financial or government systems.
B2B SaaS with European customers.
E-commerce with European clientele.
Any application where the monitoring contains endpoints with personal data (or even IDs that can be linked to personal data).

In these cases an EU-hosted service makes practical sense.

Migration

If you decide to switch from UptimeRobot or Pingdom to an EU service, the process is straightforward:

Export the list of monitors (URLs, intervals, expected status codes).
Import into the new service (most support CSV).
Set up notifications in the new channels.
Run in parallel for 1-2 weeks and compare results.
After stability turn off the old provider.

For 20-30 monitors this takes 2-4 hours.