SitesRadar vs UptimeRobot for Client Sites

UptimeRobot is the tool most freelancers reach for first, and for good reason: it is mature, reliable, and its free tier is famously generous. SitesRadar exists because uptime is only one of the ways a client site quietly breaks. This comparison lays out what each tool actually checks, what each costs for a client roster, and — honestly — when UptimeRobot is the better choice.

The short version

UptimeRobot answers one question very well: is the site responding? SitesRadar answers a broader one: is the site healthy? A site can return HTTP 200 all day while a migration left forty broken links, the SSL certificate is a week from expiring, the domain registration lapses next month, or the contact form’s email domain just landed on a blacklist. None of those page you if all you monitor is uptime.

What each tool checks

Check	UptimeRobot	SitesRadar
Uptime / HTTP status	Yes — its core strength	Yes
Uptime check interval	5 min free, 30–60 s on paid tiers	Hourly free, 5 min paid
SSL certificate expiry	On paid plans	Yes, on every plan
Domain registration expiry	On paid plans	Yes
Broken links	No full-site link crawl	Checks links on crawled pages, subject to limits
DNS monitoring	Paid plans	Yes
Email authentication records (SPF/DKIM/DMARC)	Not listed as a dedicated check	Yes, for supported records
Blacklist monitoring	No	Yes
SEO & metadata regressions	No	Yes
Status pages	Yes	No
Alert channels	Email, SMS / voice and integrations vary by plan	Email on Free; paid plans add Slack, Teams and webhooks

Two things worth stating plainly. First, UptimeRobot’s sub-minute check intervals are faster than SitesRadar’s for pure downtime detection; if your contract includes a hard SLA measured in minutes, that matters. Second, UptimeRobot offers public status pages and SitesRadar does not.

Pricing for a client roster

UptimeRobot’s free plan permits commercial and client use, subject to fair use, and includes 50 monitors with five-minute checks. Paid tiers add features such as faster checks and SSL and DNS monitoring; consult its current pricing for the right monitor count and billing period.

SitesRadar is a flat $19/month for up to 10 client sites, or $39/month for 30, with every check included on every plan. If you promise clients an uptime figure, the uptime calculator shows what each SLA level allows in minutes. There is no per-monitor math: one “site” covers its uptime, links, SSL, DNS, domain expiry, deliverability, and blacklist checks together.

For a solo freelancer with eight client sites, UptimeRobot’s free plan may cover basic uptime checks. SitesRadar’s paid plan adds a broader set of checks for that roster; whether it is worth the cost depends on which problems you need to catch.

When UptimeRobot is the right choice

• You need basic uptime checks for your own or client sites and the free tier fits your needs.
• Your only contractual obligation is uptime, and you need sub-minute detection.
• You need a public status page.
• You already have separate processes for SSL renewals, link checking, and DNS.

There is no point paying for checks you genuinely do not need. UptimeRobot does its one job extremely well.

When SitesRadar fits better

Agencies also need to watch for quiet regressions: a website update that breaks internal links, an ACME renewal that fails silently, or a DNS change made by another vendor. Email authentication issues can affect delivery, though a DNS check cannot confirm that a particular form submission reaches its inbox. The client notices before you do, and the relationship damage is done regardless of whose fault it was.

If you maintain sites for clients and your reputation rides on catching those before they do, that is the job SitesRadar was built for. The “what it catches” section lists the full sweep.

Try the difference on a real site

The fastest way to see what uptime-only monitoring misses is to run one of your client sites through SitesRadar’s free checker — no signup, and it reports selected link, SSL, DNS, and email-authentication signals from an independent check. It does not submit forms or verify inbox delivery. Review any findings against your care plan; a clean scan does not prove every page, file, or customer journey is healthy.

FAQ

Is UptimeRobot’s free plan still usable for client sites? Yes. UptimeRobot says its free plan can be used for client and commercial sites, subject to its fair-use policy. Paid tiers provide additional features and faster intervals.

Does UptimeRobot check SSL certificates and broken links? UptimeRobot offers SSL and DNS monitoring on paid plans. SitesRadar also checks broken links, email authentication records, blacklists, and metadata; compare each product’s current feature details for your use case.

Is SitesRadar cheaper than UptimeRobot? Not for uptime alone: UptimeRobot offers a free plan for client sites. SitesRadar’s paid plans combine several site-health checks per site; compare the current prices and the features your roster needs.

Which is faster at detecting downtime? UptimeRobot’s paid tiers offer 30- or 60-second intervals; SitesRadar checks uptime hourly on Free and every five minutes on paid plans. If your contract carries a hard SLA measured in minutes, that is a real difference.

Does SitesRadar have status pages? No. UptimeRobot does, and it is the one capability in this comparison that SitesRadar does not attempt to match. Public status pages serve a different audience than a freelancer maintaining client sites.

I only need uptime monitoring. Which should I buy? UptimeRobot, and this comparison is not arguing otherwise. There is no value in paying for checks you do not need. SitesRadar is for the quiet regressions — broken links after an update, a failed ACME renewal, a DNS change you did not make — that never trigger an uptime alert.

How do I find out what I am actually missing? Run one client site through the free checker. Review findings against your existing monitoring and check anything outside the scan’s coverage separately.