Every tool on this list will tell you when your home page returns 500. The differences are in everything else — and everything else is what you will actually be paged about.
An uptime monitoring tool requests your site or API from outside on a schedule and alerts you when it fails. All of the mainstream options — UptimeRobot, Better Stack, Pingdom, StatusCake, Checkly, Uptime Kuma if you self-host, and all-in-one workspaces like Merik — do that competently. The decision for a team of two to twenty without an operations person turns on eight other things: how often it checks and from where; whether it checks only reachability or also content, response time and certificates; whether it confirms before alerting; whether it sees the errors users hit while the site is up; whether it can structure monitors per client; what the status page and SLA report look like; what the free tier actually includes; and whether the alert goes to one accountable person once. This guide is the comparison framework with an honest placement of each tool, written by a vendor on the list — judge the framework on whether it is the one you would have written. Facts checked 14 October 2026; pricing and limits change, so verify on each vendor's page.
| UptimeRobot | The default first tool. Generous free tier at a 5-minute interval, paid tiers down to 1 minute, keyword and port checks, SSL expiry, basic status pages. No frontend error capture, flat monitor list, limited per-client reporting. Best for: a single product, first monitoring, zero budget. |
|---|---|
| Better Stack | Uptime plus incident management, on-call scheduling, log management and polished status pages; short intervals and multi-region on paid plans. Strong for engineering teams that want paging and logs together. More than a non-technical owner needs. |
| Pingdom | Long-established; uptime, transaction checks, real-user monitoring as a separate product; enterprise-flavoured pricing. Best for: teams already in the SolarWinds ecosystem. |
| StatusCake | Uptime, page speed, SSL and domain checks with a usable free tier; multi-location on paid plans. A close UptimeRobot alternative with a stronger SSL/domain story. |
| Checkly | Monitoring as code: scripted browser and API checks written in Playwright, run from many regions. The best option for engineers who want multi-step flow checks under version control; needs an engineer. |
| Uptime Kuma | Open-source, self-hosted, free, pleasant UI, many check types and notification channels. You host it, update it and make sure it is up. Best for: technical owners with a server already. |
| Merik | Monitoring inside the company workspace: external checks every few minutes with 14-day baselines and early warnings, a one-tag browser SDK for frontend errors, deploy webhooks, vendor status feeds, per-client assets with monthly SLA reports and token status pages, one owner alerted once with quiet hours. No SSL expiry checks yet, no scripted browser checks, no log management, no on-call rotations. Best for: small businesses and agencies that want monitoring next to employees, tasks and clients, free. |
Whatever you choose, apply the SaaS monitoring checklist to it: if the tool cannot cover a row, name the second tool that will.
Free tiers differ in interval (5 minutes is typical; 1 minute is usually paid), monitor count, locations, retention, status-page branding and alert channels. The question is not "is it free" but "is the free tier the product or a trial" — check whether the limit you will hit first (monitors, interval, SMS alerts, team members) is one you can live with. Merik's free workspace includes Digital Operations with the rest of the modules; the pricing page states what it includes and what guided setup costs.
| Criteria | Interval and locations; scope; confirmation; frontend errors; SSL/domain; per-client structure; status page and reports; alerting model |
|---|---|
| Dedicated uptime tools | UptimeRobot, StatusCake, Pingdom — strong on checks, weak on frontend errors and per-client reporting |
| Monitoring as code | Checkly — scripted browser and API checks; needs an engineer |
| Engineering suites | Better Stack — uptime, on-call, logs, status pages |
| Self-hosted | Uptime Kuma — free, capable, you run it |
| Workspace-integrated | Merik — checks, baselines, browser SDK, deploys, vendor feeds, per-client reports and status pages, with the team's modules |
| Verify | Intervals, limits and prices on each vendor's page; they change |
It depends on whether you have an engineer and whether you need to see frontend errors and per-client reports. For a single product with no budget, UptimeRobot or StatusCake. For engineers wanting scripted checks, Checkly or Better Stack. For a small business or agency wanting uptime, frontend errors, deploy correlation and per-client reports inside the workspace they already run the team from, Merik. Compare on interval, scope, confirmation, error visibility, SSL, structure, reports and alerting.
For knowing when a single site stops responding, yes — its free tier at a 5-minute interval is the standard first tool. It will not show you JavaScript errors or failed third-party requests that users hit while the site is up, and its flat list and reporting are limited for agencies with many client sites, so plan for a second tool or a different one as you grow.
Almost always. Most problems users experience — a broken button, a failed payment request, a form that will not submit — happen while the server is up and the uptime check is green. A browser SDK that captures JavaScript errors, unhandled rejections and failed requests is the only way to see them. Some tools include it; most dedicated uptime tools do not.
One to five minutes from more than one location. Five minutes is fine for a marketing site; one to two minutes for an app users depend on. Confirmation from a second check or location before alerting matters more than the raw interval.
Yes, with Uptime Kuma or similar. It is capable and free, but you must host, update and secure it, and something external must monitor it — a self-hosted monitor on the same infrastructure as the app goes down with the app.
Merik's monitoring is part of a company workspace that also runs employees, attendance, tasks, clients and invoicing, and it combines external checks with baselines and early warnings, a browser SDK for frontend errors, deploy webhooks, vendor status feeds, per-client SLA reports and status pages. It does not offer SSL expiry checks, scripted browser checks, log management or on-call rotations, which dedicated engineering tools do.
Against the eight criteria: Merik checks each registered website, web app or API from the outside every few minutes for availability, response time and HTTP status, with a 14-day baseline per monitor so drift raises an early warning (risk score, confidence score, evidence) before a hard failure; confirmed failures open an incident assigned to the asset's owner and alert once, by email or Slack, with quiet hours. The browser SDK is one script tag — no cookies, query strings stripped, server-side redaction — and groups JavaScript errors, unhandled rejections and failed requests by fingerprint per hour. SSL expiry is not checked yet. GitHub and Vercel webhooks put deploys on the timeline; vendor feeds for Stripe, Supabase, GitHub, Vercel, Cloudflare, Twilio and OpenAI explain upstream incidents. Assets sit per client, each with a monthly SLA report and a token-URL status page, and health scores are SLO error budgets against the declared tier.
Merik does not run scripted multi-step browser checks, store logs, or manage on-call rotations. If you need those, pair it with a tool that does. See Digital Operations and the free workspace.
Free, set up for you, every module included — see what the free workspace includes
The complete checklist — uptime, APIs, frontend errors, certificates, dependencies, deploys.
Per-client structure, what to check, who gets the alert, and pricing the retainer around it.
Five causes, six rules, and the two numbers that say whether your alerts are worth reading.
Request your free company workspace and bring employees, attendance, leave, payroll and tasks together.