People searching for free uptime monitoring usually need one of three things: many basic checks, faster detection, or a free status page with alerts their team will notice. No free plan leads on all three. This guide uses official pricing pages checked on August 10, 2026 and separates permanent free plans from trials.
Quick shortlist
| Tool | Current free offer | Best fit | Main limit |
|---|---|---|---|
| Webalert | 3 monitors, 10-minute checks, email + Slack, 1 status page | Small projects that value multiple check types and team-visible alerts | Small monitor allowance and slower checks |
| UptimeRobot | 50 monitors, 5-minute checks, 1 basic status page | Many low-stakes endpoints | Faster checks and broader integrations require paid plans |
| Better Stack | 10 monitors, 10 heartbeats, 3-minute checks, 1 status page | Small teams evaluating integrated incident response | Responder and extra-capacity pricing is modular |
| StatusCake | 10 uptime monitors at 5 minutes, plus small page-speed, domain, and SSL allowances | Website-health checks beyond uptime | Category quotas and faster checks depend on tier |
| Site24x7 | 5 monitors with 1-minute checks | Fast free detection with a small estate | Broad suite can be more than a simple user needs |
| Dotcom-Monitor | Up to 25 targets, 5-minute checks, 2 locations, 7-day retention | Free targets plus a path to deeper synthetic tests | Short free retention and limited locations |
| Instatus | 15 monitors, 2-minute checks, public status page, 200 subscribers | Status communication first | Subscriber, team, and page-type limits |
Free limits change. Confirm them on the vendor links below before depending on them.
Best for many free checks: UptimeRobot
UptimeRobot’s official pricing lists 50 free monitors at five-minute intervals. That is the largest simple monitor allowance in this shortlist. Choose it for hobby sites, portfolios, and low-stakes endpoints where a possible five-minute detection delay is acceptable. Its free page is basic, and paid tiers add faster checks, seats, integrations, DNS, and broader status-page features.
Best for a small multi-type setup: Webalert
Webalert’s free uptime plan includes 3 monitors at 10-minute intervals, multi-region confirmation, HTTP/HTTPS, TCP, DNS, ping, and heartbeat types, SSL alerts, email + Slack, and one status page. It is not the winner on monitor count or interval. It fits a small setup where a site, DNS record, and cron heartbeat are more useful than dozens of URL pings.
Best free incident-response preview: Better Stack
Better Stack Uptime lists 10 monitors, 10 heartbeats, one status page, and three-minute checks free. Its broader platform includes on-call and telemetry, but official pricing shows responder licenses and extra monitor packs as separate paid components. It is a strong evaluation path if logs and incident response may later belong in the same platform.
Best website-health bundle: StatusCake
StatusCake pricing lists 10 uptime monitors at five minutes, one page-speed monitor, one domain monitor, and one SSL monitor on Free. That mix suits a small marketing site. Read each category’s interval separately: a free page-speed test does not run as frequently as a free uptime check.
Best fast small free tier: Site24x7
Site24x7’s website monitoring page lists five free monitors, three locations, and one-minute checks. It is useful when speed matters more than monitor count. Site24x7 also spans APM, servers, networks, RUM, logs, and cloud monitoring, so evaluate whether that breadth helps or distracts.
Best free target allowance for synthetic expansion: Dotcom-Monitor
Dotcom-Monitor pricing lists up to 25 free targets, five-minute frequency, two locations, and seven days of retention. Its paid product adds browser, API, private-agent, and specialized protocol depth. Use it when you expect simple checks to grow into synthetic workflows.
Best status-page-led free plan: Instatus
Instatus pricing lists 15 monitors at two-minute intervals, one public status page, five team members, two on-call members, and 200 subscribers on Starter. It is the status-communication pick, but confirm whether subscriber and page-type limits match your audience.
How to choose without getting trapped
- List critical endpoints, including APIs, DNS, certificates, ports, and heartbeats.
- Set an acceptable detection delay. A five-minute interval can discover an outage almost five minutes after it begins.
- Test the actual alert channel. Email in a quiet inbox is not an incident workflow.
- Check what happens at the limit. Some tools pause executions; others require an upgrade or charge overages.
- Price the first paid tier now. Migration during an outage is a bad upgrade strategy.
For deeper criteria, use the monitoring buyer’s guide.
Bottom line
Choose UptimeRobot for free monitor count, Better Stack for a path into integrated incident response, StatusCake for mixed website-health checks, Site24x7 for fast checks on a small estate, Dotcom-Monitor for synthetic expansion, Instatus for status communication, or Webalert for a small multi-type setup with Slack and a status page. The best free uptime monitor is the one whose limits still cover the failure you cannot afford to miss.