Best Uptime Monitoring Tools in 2026 (Free and Paid, Compared)

Disclosure: PingRobot is our product. It is included in this list and clearly marked. Every other tool's plan details below come from our comparison pages, which were checked against each vendor's official pricing or product pages on October 16, 2026. Prices are in US dollars before tax and change often, so confirm on the vendor's site before you buy.

The best uptime monitoring tool depends on what you need to watch and how you respond to problems. As of October 2026: UptimeRobot has the largest free plan by monitor count; HetrixTools has one-minute checks for free; Better Stack and Pingdom suit teams that need phone escalation, on-call or transaction checks; StatusCake adds page speed and server monitoring; Checkly is for engineering teams writing scripted browser and API tests; Cronitor is strongest for cron jobs with fast checks from many regions; Uptime Kuma is free if you host it yourself; and PingRobot (ours) focuses on low-cost uptime, API, DNS, certificate and domain monitoring.

Quick comparison

How to choose

Before comparing tools, answer four questions:

1. What do you need to watch? Websites only, or also APIs, cron jobs, DNS records, TCP ports, certificates and domains? See what URLs you should monitor.
2. How fast must you know? A five-minute free plan is fine for a brochure site; checkout or a public API may justify one-minute checks.
3. Who gets alerted, and how? Email for one person is easy. Phone escalation and on-call rotations for a team point to a different class of tool.
4. Do customers need a status page? If so, check whether it can use your own domain and whether subscribers cost extra.

The tools

UptimeRobot

The best-known uptime monitor, with the largest free plan here: 50 monitors checked every 5 minutes, with HTTP, keyword, port and ping monitors. On the free plan, SSL and domain expiry, heartbeats, DNS and API monitors and maintenance windows are reserved for Solo and up, and webhooks for Team and up. Solo is $10 a month, or $108 a year, for 10 monitors checked every 60 seconds. Higher plans add 30-second (Team) and 15-second (Scale) checks, and it offers SMS and voice credits, mobile apps and a public API.

Choose it if you have many simple sites to watch for free, or need ping or UDP monitors. PingRobot vs UptimeRobot.

Better Stack

A full incident-management platform (formerly Better Uptime). The free tier has 10 monitors and 10 heartbeats checked every 3 minutes, with email and Slack alerts and one status page. Paid uptime access starts with a Responder license at $34 a month, or $29 billed annually, which includes 10 monitors; 50 more cost $25 a month. It adds on-call scheduling, unlimited phone and text-message escalation, mobile apps, 30-second checks, Playwright browser checks, and logs and traces in the same product.

Choose it if you need on-call rotations and phone escalation in one tool. PingRobot vs Better Stack.

Pingdom

Part of SolarWinds. There is no free plan, only a 30-day trial. The pricing calculator starts at $18 a month, or $16.50 billed annually, for 10 uptime checks, 1 advanced (transaction) check and 50 text messages; 50 uptime checks cost $78 a month ($71.50 annually). Its strengths are multi-step transaction checks, page speed and real user monitoring, more than 100 probe servers and unlimited users.

Choose it if you need transaction checks or real user monitoring, or already use SolarWinds. PingRobot vs Pingdom.

StatusCake

The free plan has 10 uptime monitors every 5 minutes, plus 1 SSL monitor, 1 domain monitor and 1 page speed monitor. Superior costs $24.49 a month, or $20.41 billed annually, for 100 uptime monitors checked every minute, with 50 SSL and 50 domain monitors and 75 SMS credits a month. It also offers server monitoring, domain blacklist checks, white-label reports and 30-second checks on its Business plan. Status pages are sold as a separate product.

Choose it if you want page speed, server and blacklist monitoring alongside uptime. PingRobot vs StatusCake.

HetrixTools

One of the most generous free plans: 15 uptime monitors checked every minute from 4 of its 12 locations, with the condition that you log in at least once every 90 days. Professional costs $9.95 a month or $99.95 a year for 30 monitors, with 25 SMS or phone credits a month. It has 19 alert channels, including Telegram, Microsoft Teams and PagerDuty, plus ping, SMTP and server monitoring with an optional agent.

Choose it if you want one-minute checks without paying, or server monitoring with the same tool. PingRobot vs HetrixTools.

Cronitor

Built around cron job and heartbeat monitoring, with website and API checks as well. The free Hacker plan has 5 monitors checked at most every 5 minutes, with email, Slack, Discord, Teams and webhook alerts and a basic status page. Business is priced per monitor ($2 a month) plus per user ($5 a month), so 50 monitors and one user come to $105 a month at listed rates. It offers 30-second checks from up to 12 regions you choose, on-call integrations, browser checks and real user monitoring.

Choose it if you run many scheduled jobs and want fast checks from regions you pick. PingRobot vs Cronitor.

Uptime Kuma

Free, open-source software under the MIT license that you install on your own server with Docker or Node.js. There are no plan limits; you pay for the server and handle updates, backups and email setup. It supports HTTP, keyword, JSON query, TCP, ping, DNS, WebSocket, Docker and game server monitors, intervals down to 20 seconds, more than 90 notification services and multiple status pages on your own domains. Checks run from wherever you install it, so a monitor on the same network as your site can fail with it.

Choose it if you enjoy self-hosting or need to watch services on a private network. PingRobot vs Uptime Kuma.

Checkly

A synthetic monitoring platform for engineering teams. The free Hobby plan has 10 uptime monitors checked every 2 minutes from 6 locations, plus 10,000 API and 1,000 browser check runs a month. Starter is $24 a month billed annually for 50 uptime monitors at one-minute frequency; status pages are a separate Communicate plan from $9 a month billed annually. Its strength is Playwright browser checks and scripted API checks managed as code with a CLI, Terraform or Pulumi.

Choose it if your team wants end-to-end tests running in production, managed like code. PingRobot vs Checkly.

PingRobot (our product)

PingRobot is a hosted uptime monitor that runs on Cloudflare's network. The Free plan has 10 monitors checked every 5 minutes: HTTP(S), keyword, API monitors (one request with JSON rules on the response), DNS record, TCP port and heartbeat monitors. Failures are re-checked from a second region before alerting, and alerts go out by email and signed webhooks. SSL certificate and domain expiry reminders, maintenance windows, custom requests, slow-response alerts and a status page on a pingrobot.io subdomain are included on Free. Pro is $9 a month or $90 a year for 50 monitors checked every minute, adds Slack and Discord alerts, and includes 5 status pages on your own domain with email subscribers.

It does not offer ping (ICMP) or UDP monitors, browser checks, team accounts or a choice of monitoring regions, and the fastest interval is one minute. Choose it if you want uptime, API, DNS, certificate, domain and cron monitoring with webhooks on the free plan, and an inexpensive first paid step.

Also worth knowing: Healthchecks.io

If you only monitor cron jobs, Healthchecks.io is a focused, open-source option. As of October 2026 its free Hobbyist plan covers 20 jobs and Business is $20 a month for 100 jobs, with more than 25 integrations. It does not check websites. PingRobot vs Healthchecks.io.

Picking by situation

The fairest test is to run two candidates side by side on the same URLs for a week and compare which one alerted, how fast, and how often it was wrong. For setting up the monitors themselves, see how to monitor website uptime for free, and for all head-to-head pages, the comparison index.

Start monitoring free — 10 monitors, no credit card.