# website monitoring
Domain Monitor vs Datadog
Comparing Domain Monitor and Datadog is a bit like comparing a specialist to a hospital — one is built with a specific job in mind, the other is a comprehensive platform covering many jobs. Datadog is an enterprise observability platform used by large engineering teams for infrastructure monitoring, APM, distributed tracing, log management, and security monitoring. Domain Monitor is a focused tool for monitoring domain health: SSL certificates, domain expiry, DNS records, and uptime.
Most teams who use Datadog also need something like Domain Monitor. Here's why.
What Datadog Is Built For
Datadog is one of the most widely-used observability platforms in the industry. It covers:
- Infrastructure monitoring — Server metrics, containers, Kubernetes, cloud services
- Application performance monitoring (APM) — Distributed tracing, service maps, code-level performance
- Log management — Centralised log ingestion, search, and alerting
- Synthetic monitoring — Browser tests, API tests, multi-step transactions
- Real user monitoring — Actual visitor performance data
- Security monitoring — CSPM, SIEM, application security
- Uptime monitoring — HTTP checks as part of Synthetic Monitoring
- SSL monitoring — Certificate expiry as part of Synthetic checks
Datadog is built for engineering organisations that need deep visibility into complex, distributed systems. It's priced accordingly — typically several hundred to several thousand dollars per month for meaningful use.
The Domain Monitoring Gap in Datadog
Datadog's Synthetic Monitoring can check whether a URL is responding and can alert on SSL certificate expiry as part of those checks. But it doesn't cover the domain ownership layer:
- Domain expiry monitoring — Datadog won't alert you that your domain renews in 45 days
- DNS record change monitoring — Datadog won't alert you that your MX record was removed or your nameservers changed
- WHOIS monitoring — Datadog won't alert you that your domain's registration data changed
- Nameserver change alerts — The most critical domain security signal isn't something Datadog tracks
These omissions make sense: Datadog is built for application and infrastructure observability, not domain asset management.
What This Means in Practice
Engineering teams using Datadog often experience domain-related outages that their Datadog setup didn't catch early:
- A domain expires because auto-renewal failed — Datadog catches this when the site stops responding, not 60 days out
- Nameservers are changed during an infrastructure migration — Datadog doesn't alert on the DNS-layer change, only on application response failures
- An SSL certificate is renewed at the server level but a subdomain is missed — discovered when users start seeing certificate errors
Domain Monitor provides the leading indicators that catch these failures before they cause outages.
Feature Comparison
| Feature | Domain Monitor | Datadog |
|---|---|---|
| HTTP uptime monitoring | Yes | Yes (Synthetics) |
| SSL expiry alerts | Yes | Yes (Synthetics) |
| Domain expiry monitoring | Yes | No |
| DNS record change alerts | Yes | No |
| Nameserver change alerts | Yes | No |
| WHOIS monitoring | Yes | No |
| Infrastructure monitoring | No | Yes |
| APM / distributed tracing | No | Yes |
| Log management | No | Yes |
| Security monitoring | No | Yes |
| Status pages | Yes | Yes (Status Page product) |
Who Uses Both
The most common pattern: engineering teams use Datadog for infrastructure, APM, and logs. The same organisation uses Domain Monitor to track domain expiry, SSL certificates, and DNS health across their domain portfolio — including domains that aren't attached to monitored infrastructure (marketing sites, parked domains, client-managed domains).
The cost difference also matters. Datadog's pricing makes it practical only for significant infrastructure. Domain Monitor's focused domain monitoring is accessible at a much lower price point for the specific domain health use case.
When Datadog Is Sufficient
If your Datadog Synthetics setup already covers SSL expiry alerts and you manually track domain renewals through your registrar — and you're comfortable that DNS changes will be caught by application failures — you may not need a separate domain monitoring tool.
For most teams, however, the gap between "Datadog shows green" and "domain expiry is approaching" is a risk worth closing.
Get Started
Domain Monitor adds domain expiry, DNS change monitoring, WHOIS alerts, and SSL monitoring alongside Datadog. Create a free account.
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