Quick answer
UptimeRobot - UptimeRobot wins for most builders because its free tier covers far more monitors, more integrations, and faster growth into a broader team setup, while UptimeToolbox is better only if you want status pages and server monitoring in a smaller, simpler package.
How the free tiers compare
These two free tiers solve related but different problems. UptimeRobot is the better fit if you are monitoring lots of endpoints, APIs, or ports and want room to grow into a team workflow. Its free plan is broad on monitor types, includes API access, multi-location checks, and has a much higher ceiling at 50 monitors. The tradeoff is that the collaboration side is thin on free: no login seats, no notify seats, and only basic status pages and limited integrations. UptimeToolbox feels more opinionated and status-page oriented. Its free plan is smaller at 5 monitors, but it includes 1 status page, server monitoring, SSL monitoring, custom domains, white labeling, and some SMS/voice credit. Pick it if presentation and a small monitored surface matter more than scale.
UptimeRobot vs UptimeToolbox free tier, side by side
| UptimeRobotFTV 53 | UptimeToolboxFTV 56 | |
|---|---|---|
| Free monitorsUptimeRobot has a much higher free monitor cap. | Up to 50 | 5 |
| Monitoring interval on free tierUptimeToolbox checks more frequently on free. | 5 minutes | 3 minutes |
| Status pages on free tierUptimeToolbox is more usable for public status out of the box. | Basic status pages | 1 status page |
| Integrations on free tierOnly UptimeRobot gives a clear free integration cap in the input. | Up to 5 | Not stated |
| Data retention on free tierUptimeToolbox splits retention into historical and high-res windows. | 3 months | 3 months of historical data, plus 7 days high-resolution retention |
| Notify/login seats on free tierThe inputs explicitly show weaker collaboration on UptimeRobot’s free tier. | No notify seats, no login seats | Team members included |
| API access on free tierUptimeRobot explicitly includes API access. | Included | Not stated |
| Server monitoring on free tierUptimeToolbox clearly includes server monitoring. | Not stated | 1 server |
After you outgrow the free tier
Both products use flat monthly pricing for their first paid tier, so the decision is about which paid ceiling you run into first, not per-use overages. UptimeRobot starts at $8/mo for Solo, then $34/mo for Team and $64/mo and up for Enterprise. UptimeToolbox starts at $29/mo for Professional, then $99/mo for Business. For small-team usage, UptimeRobot is cheaper and scales more gradually. UptimeToolbox gets expensive sooner, but it bundles more status-page and server-oriented capacity in its first paid step.
Cost at real usage
| Usage | UptimeRobot | UptimeToolbox |
|---|---|---|
| Small solo project, 5 monitors, basic alertsBoth free tiers cover this size. | Free (within tier) | Free (within tier) |
| 10 monitors, one public status page, light alertingUptimeToolbox free tier tops out at 5 monitors. | Free (within tier) | ~$29/mo |
| 25 monitors with 1-minute or faster checksUptimeRobot free checks are 5 minutes; faster checks require paid, and UptimeToolbox’s first paid plan is 25 monitors with 1-minute checks. | ~$8/mo | ~$29/mo |
| 100 monitors, team access, several status pagesUptimeRobot’s Team plan reaches 100 monitors; UptimeToolbox needs Business for 100 monitors. | ~$34/mo | $99/mo |
Estimates, not quotes. Usage-based rates change - verify with the vendor's pricing page before committing.
When to pick each one
Pick UptimeRobot when…
- You need to watch more than 5 endpoints without paying right away.
- You monitor APIs, ports, ping targets, keywords, DNS, or SSL checks and want one free tool for all of them.
- You care about multi-location checks and API access from day one.
- You expect to grow into a team setup with login seats and notify seats later.
- You want the free tier to stay useful for a larger personal project or early-stage product.
Pick UptimeToolbox when…
- You only need a small set of monitors and want status pages included on the free tier.
- You want server monitoring alongside website checks in the same starter plan.
- You care about custom domains or white labeling even before paying.
- You want SMS or voice credit included at the free level.
- Your setup is a smaller web app or Linux server footprint and you do not need 50 monitors.
Bottom line
For the most common builder case, UptimeRobot is the better free-tier pick. It gives you far more headroom on monitor count, broader endpoint coverage, and an easier path into team usage without jumping straight to expensive plans. UptimeToolbox is the stronger choice if your free-tier priority is a small, polished status-page setup with server monitoring and included branding features. If you expect to monitor a growing product or many endpoints, start with UptimeRobot.
Read the full listings: UptimeRobot and UptimeToolbox. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.