Uptime Monitoring Tool from multiple regions.
Multi-region website and API uptime monitoring with SSL and domain-expiry alerts. We check your site from data centers around the world and only wake you when several regions agree it is really down. When they do, the Defenso Alerts phone app rings a call-style alarm through silent mode and Do Not Disturb, so a 3am outage reaches you first, not your customers.
- Checks from every region
- No single-region false alarms
- SSL & domain expiry alerts
- Phone-app alarm through Do Not Disturb
We watch from everywhere, so a bad hop never fools us.
A single failed check from one location is not an outage. We confirm from several regions before we alert you, so you get woken for real downtime and nothing else. And we watch the things that quietly expire, too.
Real uptime and response time from each location. If one data center blips but the rest can reach you, we hold the alert instead of waking you for a false alarm.
We watch your TLS certificate and your domain registration and warn you in time to renew both, so visitors never hit a security error and your domain never lapses out from under you.
Email, Slack, Discord, Telegram, webhook, and the Defenso Alerts phone app that can ring like a call through Do Not Disturb, so a 3am outage actually wakes you.
Turn any monitor into a branded status page.
Show your customers you are on it. Every uptime monitor can power a public status page with your logo, colors and custom domain, plus email subscribers and a live badge for your own site.
More than a ping: every monitor type.
A 200 status code is not the same as a working site. Pick the check that actually proves your service is healthy, and mix them per monitor.
HTTP / HTTPS & status code
Confirm the page loads and returns the status you expect. Follows redirects, and you can require a specific code so a stray 302 or 403 never reads as healthy.
Keyword & content match
A page can return 200 while showing an error. Require a word or phrase to be present (or absent) so a broken deploy or a maintenance screen is caught as down.
SSL certificate & domain expiry
We watch your TLS certificate and your domain registration and warn you well before either lapses, so the padlock never turns red and your domain never expires out from under you.
Port & TCP service
Not just the website: check a database, mail or custom TCP port answers, so a backend that stops accepting connections pages you before customers notice.
Response-time & slow alerts
Track latency from each region and get warned when your site is technically up but crawling, the early sign of an incident before it becomes a hard outage.
Cron & heartbeat checks
Expect a scheduled job to check in. If your backup, queue or cron goes silent past its window, you hear about it instead of finding out later.
Why multi-region checks beat a single prober.
A monitor that checks from one location cannot tell the difference between your site being down and its own network having a bad minute. Ours checks from many.
When a check fails, we do not page you on the first miss. We re-probe from several data centers in different regions, and only record a real outage when multiple vantage points agree your site is unreachable. A single blipping network path, a regional route flap, or one prober being rate-limited never turns into a 3am false alarm.
That same spread makes your status page honest: response time is measured from each region, so you can see whether a slowdown is global or just one part of the world, and prove your real availability to customers with per-region history.
Checks run as often as every 30 seconds on higher plans, so the gap between "it went down" and "you know" is measured in seconds, not the 5 minutes most free monitors give you.
Frequently asked questions.
Everything people ask before they start. Still unsure? We are one message away.
A single prober cannot tell its own network problem apart from your site being down, so it pages you on false alarms. We check from multiple regions and only alert when several agree the site is really unreachable, and we measure response time per region so a slowdown is easy to localize.
HTTP/HTTPS with a required status code, a keyword or content match, SSL certificate expiry, domain-registration expiry, TCP ports and backend services, response-time/slow alerts, and cron/heartbeat check-ins. You can mix types per monitor.
As often as every 30 seconds on higher plans, and we confirm across regions before alerting. Alerts reach you by email, Slack, Discord, Telegram, webhook, and the Defenso Alerts phone app, which can ring like a call through Do Not Disturb.
Yes. We watch your TLS certificate and your domain registration and warn you in time to renew both, so visitors never hit a security error and your domain never lapses.
Yes. Any monitor can power a public, branded status page with your logo, colors and custom domain, plus email subscribers and a live badge for your own site.
Yes. Free includes uptime monitoring with SSL and domain expiry alerts, no card required. Higher plans add faster check intervals, more monitors and more regions.
Know before your customers do, for free.
No card, no install. Add a site and multi-region monitoring starts in under a minute, with SSL and domain alerts on the channel you already use.