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Top 10 Uptime Monitoring Tools

The services that check your website, API or server around the clock and alert you the moment it goes down, ranked by how many users or customers each one says it has.

UptimeRobot3.5M+ users 2

StatusCake220,000+ customers 3

Site24x713,000+ paid customers

Quick answer

UptimeRobot is the most-used uptime monitoring tool, with 3.5M+ users and a free plan of 50 monitors checked every 5 minutes. StatusCake is second with more than 220,000 customers and checks from 30 countries, and Site24x7 is third with 13,000+ customers and checks from more than 130 cities. For testing logins and checkouts in a real browser, Dotcom-Monitor is the specialist.

How it's ranked: Users, customers or organizations each vendor says it serves, as published on its own website (read November 2026). Counts are each company's own claims and are measured differently (UptimeRobot counts users; Hyperping counts companies publishing status pages), so treat them as a guide to scale, not an audit. Checkly, HetrixTools, Oh Dear and Uptime.com publish no count; they are ranked last and listed alphabetically.

UptimeRobot

UptimeRobot · Website and endpoint uptime monitoring with status pages

3.5M+ users

The most-used uptime monitor, with the best free plan.

UptimeRobot says 3.5M+ users trust it, the largest number published by any tool on this list. Its free plan covers 50 monitors checked every 5 minutes, with no credit card and nothing to install. Paid plans speed checks up: Solo checks every 60 seconds and costs $9 a month billed annually for 10 monitors, Team checks every 30 seconds for 100 monitors at $35 a month, and Scale checks every 15 seconds for 200 monitors at $65 a month. Before it opens an incident, a failed check is re-verified from a different data center in the same region, and the site says that runs on every plan, including Free. It connects to 20+ integrations, and Enterprise plans for more than 500 monitors add SLA reporting and SOC 2. It fits freelancers, small teams and side projects that want alerts without a big bill.

Best forAnyone who wants a generous free plan and simple, fast setup

Skip it ifYou need deep real-browser transaction testing

Source: uptimerobot.com/

StatusCake

StatusCake (TrafficCake Limited) · Website, API, SSL, domain and server monitoring

220,000+ customers

The all-round pick for small and mid-size businesses.

StatusCake says it has more than 220,000 customers and has been monitoring teams since 2012. It covers websites, APIs, SSL certificates, domains, page speed and servers, and adds status pages for telling customers what is happening. Uptime checks run from 30 different countries, at 30-second check rates on the Business plan. The free plan includes 10 uptime monitors at 5-minute intervals plus one page speed, one domain and one SSL monitor. Superior moves to 1-minute intervals and 100 uptime monitors, and Business raises that to 300 uptime monitors at 30-second intervals, with a 7 day free trial on paid plans. It also offers Google single sign-on for all customers and a Terraform provider. It fits businesses that want one dashboard for every external check.

Best forSmall and mid-size businesses that want uptime, SSL, domain and page speed checks together

Skip it ifYou need checks faster than every 30 seconds

Source: www.statuscake.com/

Site24x7

Zoho Corporation (ManageEngine) · Website, server, cloud and application monitoring

13,000+ paid customers

Best when uptime is one part of a bigger monitoring job.

Site24x7 says it has more than 13,000 paid customers and runs 1.3 billion uptime checks per day. Its website monitoring checks HTTP and HTTPS over IPv4 and IPv6, and the same product adds ping monitoring and DNS monitoring of A, AAAA, CNAME, MX and TXT records. Website checks run from more than 130 cities and can be set as often as every 10 seconds on paid plans. Pricing starts at $0 with a free plan; Web Uptime costs $9 a month for 25 monitors at 1-minute checks, Web Perf is $36 a month for 40 monitors from 8 locations, and Enterprise Plus Web is $899 a month for 2,500 monitors with 30-second checks from 16 locations. Paid plans come with a 30-day free trial. It fits IT departments that want uptime alerts next to server and application data.

Best forIT teams that want uptime checks inside a wider monitoring platform

Skip it ifYou only need a handful of simple website checks

Source: www.site24x7.com/website-monitoring.html

Dotcom-Monitor

Dotcom-Monitor · Website, real-browser and API monitoring

10,000+ organizations

Best for testing full user journeys.

Dotcom-Monitor says it is trusted by 10,000+ organizations worldwide and calls itself a website monitoring leader since 1998, the longest track record on this list. It goes beyond basic ping checks, testing logins, carts, checkouts and APIs in real Chrome and Edge browsers with multi-step scripted transactions and an EveryStep Recorder that captures user actions. Checks run from 30+ monitoring locations across North America, Europe, Asia-Pacific and South America, and its own guidance is to check revenue-critical flows every 1 to 5 minutes. Alerts go to Slack, Teams, PagerDuty, ServiceNow, SMS and email, private agents cover internal systems, and a Secure Vault stores test credentials encrypted. There is a 30-day free trial. It fits e-commerce and SaaS teams that need to know a checkout works, not just that a page loads.

Best forOnline stores and apps where logins, carts and checkouts must keep working

Skip it ifYou want a free plan

Source: www.dotcom-monitor.com/

Hyperping

Hyperping · Uptime monitoring, status pages and on-call

1,000+ companies (status pages)

Best all-in-one for status pages and on-call.

Hyperping says Pitch, Slite, Beatport and 1,000+ more companies publish their status pages on it; that is the only customer figure it gives, so it counts status-page users rather than every account. It combines uptime monitoring, status pages and on-call, checks from 18 monitoring locations worldwide, and double-checks every alert from at least two other locations before it fires. The free tier covers 20 monitors with no credit card, paid plans start at $29 a month, and Business costs $299 a month for 1,000 monitors, 10 status pages, 20 team members and 20-second checks. It also offers a REST API, a Terraform provider and an MCP server. It fits software companies that would otherwise pay for separate monitoring, status page and paging tools.

Best forSaaS teams that want monitoring, status pages and on-call in one tool

Skip it ifYou only need a single basic check

Source: hyperping.com/

Odown

Odown · Uptime monitoring, alerts and status pages

500+ customers

The budget all-in-one.

Odown says it has 500+ customers, 2000+ monitors and runs 600k checks per day. It pitches itself as complete uptime monitoring made simple: one dashboard for uptime monitoring, alerts and status pages. Checks run from 17 data centers worldwide. Its pricing pitch is straightforward: Odown lists $12 a month against a competitor stack it prices at $169 a month, made up of Pingdom, PagerDuty and StatusPage, and says you can save up to 14x. There is no free plan, but there is a 14 day free trial with no credit card required. It is a much smaller company than the leaders here, which can mean a simpler product. It fits startups and small agencies that want monitoring and a status page without paying for three tools.

Best forSmall teams that want monitoring and status pages for one low price

Skip it ifYou want a permanent free plan

Source: odown.com/

Checkly

Checkly · Synthetic and uptime monitoring as code with Playwright

No count published

Best monitoring-as-code tool for developers.

Checkly does not publish a customer count, so it is ranked with the tools that give no number. It is built for developers: you write, test and version monitors as JS/TS, Terraform or Pulumi, and use Playwright to simulate real user actions across web apps and APIs. Every page your tests visit is also scored on Web Vitals such as LCP, INP and CLS. Monitors deploy to 20+ locations worldwide. The free Hobby plan includes 10 uptime monitors at up to 2-minute frequency from 6 locations, plus 10,000 API check runs and 1,000 browser check runs a month. Starter costs $24 a month and Team $64 a month. It fits engineering teams that already use Playwright for testing and want the same scripts watching production.

Best forDeveloper teams that want monitors written and versioned like code

Skip it ifYou want point-and-click setup with no coding

Source: www.checklyhq.com/pricing/

HetrixTools

HetrixTools · Uptime, server and blacklist monitoring

No count published

Best for servers plus email reputation.

HetrixTools does not publish a customer count, so it is ranked with the tools that give no number. Its uptime monitor checks websites and servers every minute from up to 12 locations around the world, and outages are confirmed by several locations before an alert is sent, with ping and MTR diagnostics included. The free plan is generous: 15 uptime monitors free forever and 32 blacklist monitors free forever, and a free open-source server agent comes with every uptime monitor. Alerts go out by email, SMS, phone call and webhook plus 21 integrations, and every channel is available on every plan, including Free. Its blacklist monitor covers all major blacklists and Microsoft SNDS, which matters if you send email from your own servers. It fits web hosts and server admins.

Best forHosting providers and sysadmins who also care about email blacklists

Skip it ifYou need real-browser transaction tests

Source: hetrixtools.com/

Oh Dear

Oh Dear · Website monitoring for uptime, SSL, broken links and cron

No count published

Best for agencies with many client sites.

Oh Dear does not publish a customer count, so it is ranked with the tools that give no number; it does say it has run 72 billion checks and sent 43 million alerts. It watches every page of every site you manage, covering uptime, SSL, DNS, cron jobs, broken links, performance and status pages. Uptime is checked every minute from multiple locations, while broken-link crawls and Lighthouse checks run daily. Alerts can be routed to specific people through Slack, Teams, PagerDuty, Opsgenie or webhooks, and clients can get branded status pages and automated monthly reports. Pricing starts at $17 a month for up to 2 sites and servers with all features included and no per-client fees, and there is a 10-day free trial with no credit card. It is EU-hosted. It fits agencies running many client sites.

Best forAgencies and freelancers who look after many client sites

Skip it ifYou need monitoring from a large global network

Source: ohdear.app/

Uptime.com

Uptime.com · Website, API, synthetic and real user monitoring

No count published

Best for breadth of check types.

Uptime.com does not publish a customer count, saying only that it is trusted by thousands, so it is ranked with the tools that give no number. It monitors websites and APIs from 80+ global monitoring points of presence and covers synthetic real-browser checks, real user monitoring, private location monitors behind a firewall, heartbeat (cron) checks and third-party cloud status. Every plan includes basic checks such as SSL, DNS, ping, SMTP, SSH and domain WHOIS, plus 20+ integrations including Slack, Jira, Teams, SMS and phone. It offers public and private status pages, a mobile app, SLA reporting and 24/7/365 support, and reports a completed SOC 2 Type II audit. It fits operations teams that want one vendor for every kind of external check.

Best forLarger teams that want many check types and strong support

Skip it ifYou want the cheapest possible option

Source: uptime.com/

Questions people ask

What is the best uptime monitoring tool?

UptimeRobot is the most used, with 3.5M+ users, 50 free monitors and paid checks as often as every 15 seconds. StatusCake, with more than 220,000 customers, is a strong all-round alternative.

Which uptime monitor has the best free plan?

UptimeRobot gives 50 monitors free at 5-minute intervals. Hyperping offers 20 free monitors, HetrixTools 15 uptime monitors free forever with 1-minute checks, and StatusCake and Checkly 10 each.

Which tool checks most often?

Site24x7 can check as often as every 10 seconds on paid plans, UptimeRobot every 15 seconds on its Scale plan, and Hyperping every 20 seconds on Business.

Can uptime tools test logins and checkouts?

Yes. Dotcom-Monitor runs multi-step scripted transactions in real Chrome and Edge browsers, and Checkly uses Playwright scripts to simulate real user actions.

How were these tools ranked?

By the number of users, customers or organizations each vendor publishes on its own website. These are the companies' own claims; tools that publish no count are listed last.

How we ranked

Users, customers or organizations each vendor says it serves, as published on its own website (read November 2026). Counts are each company's own claims and are measured differently (UptimeRobot counts users; Hyperping counts companies publishing status pages), so treat them as a guide to scale, not an audit. Checkly, HetrixTools, Oh Dear and Uptime.com publish no count; they are ranked last and listed alphabetically. Every number on this page comes from the source linked under each pick, and every photo shows the actual product. Brands can't pay to be on this list.

List source: uptimerobot.com/ · Updated 2026-11-14