Site24x7 checks your websites around the clock and emails you when one goes down or its SSL certificate is about to expire. It's for founders and small teams with lots of sites, such as agencies or anyone running several projects. The free plan is "free forever — not a trial" and needs no card. Paid plans start "from just $9/month".
What it can do for you
The free plan watches up to 50 websites every 5 minutes. It runs HTTP and HTTPS checks, validates your SSL certificate and warns you before it expires, and pings your server. You get email alerts, one public status page, and uptime reports to show clients or your team how reliable a site has been.
It works with any website URL. The free page doesn't say whether API monitoring is included, and mobile apps aren't mentioned.
Why it stands out
It's one of only two hosted free plans we compared on 26 Oct 2026 with 50 monitors, and the only one of those with SSL certificate checks.
The honest downsides
- Basic checks only. Free lists HTTP, HTTPS, SSL and ping. Ports, keyword and cron checks aren't listed.
- Email alerts only. No chat or text alerts are listed on Free.
- No domain expiry alerts listed.
- 5-minute checks. A short outage can be over before you hear.
Skip it if
- you need to watch cron jobs, ports or APIs
- you want alerts in a team chat app
Alternatives
- Better pick for faster checks and domain alerts: HetrixTools. It's free for 15 sites at 1-minute checks, with SSL, domain and nameserver alerts, plus port and cron checks. The catch: you must log in every 90 days.
- UptimeRobot covers 50 monitors free, including ports, keywords and cron jobs, with chat integrations, but has no SSL checks on Free.
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