An honest comparison from people who build one.
We make UptimeSignal, so we're biased. But we've used most of these tools ourselves,
and we'll tell you where each one is strong and where it falls short.
| Tool | Free tier | Paid from | Min interval | Status pages | Error tracking | Best for |
|---|---|---|---|---|---|---|
| UptimeRobot | 50 monitors | $7/mo | 5 min (free), 1 min (paid) | Yes | — | Maximum free monitors |
| Pingdom | None | $15/mo | 1 min | Yes | — | Enterprise teams |
| Better Stack | 10 monitors | $29/mo | 3 min (free), 30s (paid) | Yes | Logs (paid) | Incident management |
| StatusCake | 10 monitors | €20/mo | 5 min (free), 1 min (paid) | Paid only | — | Page speed testing |
| Datadog | None | $23/mo per host | 1 min | No | Full APM | Full observability stack |
| UptimeSignal | 25 monitors | $10/mo | 5 min (free), 1 min (paid) | Unlimited (free) | Yes (built-in) | Developers, AI-built apps |
Pricing as of April 2026. Check each provider for current details.
Almost every tool here answers one question: is it up? But when something breaks, the next question is what's actually erroring? And that usually means bolting an error tracker like Sentry onto your uptime tool.
Two tools in this list close that gap. Datadog does it with full APM, powerful, but heavy and priced per host. UptimeSignal does it lightly: synthetic uptime checks plus a simple application error/event stream (one POST /events, no SDK), in one dashboard.
The other piece is MCP: if you build with AI coding agents, a native MCP server lets the agent set up monitors and triage the errors they surface, uptime and errors, investigated by your agent, in one place.
The most popular free uptime monitor. UptimeRobot has been around since 2010 and has the largest free tier at 50 monitors with 5-minute checks. If you just need a lot of monitors and don't want to pay anything, it's hard to beat.
The paid plan starts at $7/mo for 50 monitors with 1-minute checks. Additional monitors cost extra. The dashboard is functional but dated. Multi-region checks are available on paid plans.
Owned by SolarWinds. Pingdom has been around forever and is one of the most recognized names in monitoring. It has no free tier. Plans start at $15/mo for 10 synthetic monitors.
The main selling point is real user monitoring (RUM), which tracks actual visitor performance in addition to synthetic checks. If you need both synthetic and RUM in one tool, Pingdom is worth looking at. For synthetic-only monitoring, the price is steep for what you get.
Better Stack combines uptime monitoring with incident management, on-call scheduling, and status pages. The free tier gives you 10 monitors with 3-minute checks. Paid plans start at $29/mo.
The incident management features are where Better Stack differentiates. If your team needs on-call rotations, escalation policies, and post-mortem tools alongside uptime monitoring, it's a good fit. The paid plans can get expensive with add-ons for logs and tracing.
A UK-based monitoring tool that includes uptime, page speed, domain, and SSL monitoring. The free tier gives you 10 monitors with 5-minute checks. Paid plans start at €20/mo.
StatusCake is a solid all-rounder. The page speed testing is a nice extra that most competitors charge for separately. The free tier doesn't include status pages, so you'll need to upgrade if you want a public status page.
That's us. We built UptimeSignal for developers who want straightforward monitoring without a complex pricing page. The free tier gives you 25 monitors with 5-minute checks, every alert channel (email, Slack, Discord, Telegram, webhooks), and unlimited status pages. Pro is $10/mo billed annually (or $15/mo monthly) for unlimited monitors with 1-minute checks.
What's different: UptimeSignal does uptime and lightweight application error/event tracking in one tool, answer "is it up?" and "what's erroring?" from one dashboard, instead of stitching an uptime tool to Sentry. It's also MCP-native: the uptimesignal-mcp server lets AI coding agents like Claude Code and Cursor create monitors and triage error events directly. We don't have multi-region checks or RUM, and we're a newer, smaller team than UptimeRobot or Pingdom.
Looking specifically to switch from UptimeRobot? See our UptimeRobot alternative breakdown.
If you want the most free monitors: UptimeRobot (50 monitors). Note that their free plan prohibits commercial use.
If you need incident management and on-call: Better Stack. It bundles monitoring with incident workflows, which saves you from running separate tools.
If you need real user monitoring (RUM): Pingdom. It's the only tool here that tracks actual user page load performance alongside synthetic checks.
If you're already in the Datadog ecosystem: Just add Synthetic Monitoring to your existing Datadog setup. No point in running a separate tool.
If you're a developer who wants free monitoring with status pages: UptimeSignal. Our free tier is the only one here that includes unlimited status pages and allows commercial use.
If you build with AI coding agents, or want uptime + error tracking in one: UptimeSignal. It's MCP-native (so Claude Code / Cursor can manage monitors and triage errors) and bundles lightweight error/event tracking, no second tool to stitch in.
It depends on what you need. UptimeRobot has the largest free tier (50 monitors) but prohibits commercial use. Better Stack is best for built-in incident management and on-call. Pingdom adds real user monitoring. Datadog fits teams already in its observability stack. UptimeSignal is best for developers who want a free tier with unlimited status pages, commercial use allowed, plus built-in error/event tracking and a native MCP server.
Most uptime tools only answer "is it up?". The exceptions: Datadog does full APM error tracking (powerful but heavy and priced per host), and UptimeSignal includes lightweight application error/event tracking alongside uptime monitoring, one dashboard for both "is it up?" and "what's erroring?".
UptimeSignal ships a native MCP server (uptimesignal-mcp) so agents like Claude Code and Cursor can create monitors, check status, and triage error events directly. Some competitors have community MCP servers, but UptimeSignal pairs an official MCP with combined uptime + error data.
UptimeSignal is the closest free alternative that also allows commercial use (UptimeRobot's free tier does not) and includes unlimited status pages on the free plan.
25 monitors. Unlimited status pages. No credit card.
We'll send you a magic link. No password to forget.
Also see: Free Uptime Monitoring · API Monitoring