Pleenx vs UptimeRobot
The OG free uptime monitor. Massive free tier, simple HTTP/port checks every 5 minutes.
Cheapest tier · Free (50 monitors · 5-min interval) ↔ Pleenx Solo · $29/mo
Where UptimeRobot shines
- /strength · 01
Truly free tier — 50 monitors with 5-minute checks, no credit card. Hard to beat at zero dollars.
- /strength · 02
Extremely simple to set up — paste URL, get pinged when it 4xx/5xx.
- /strength · 03
Status page generator included even on free tier.
Where Pleenx differs
- /angle · 01
UptimeRobot is just uptime + port checks. Pleenx covers SSL, WHOIS, DNS, SEO, email auth, security headers — eight probe types vs one.
- /angle · 02
Pleenx is white-label-ready (branded PDF reports, branded subdomain). UptimeRobot's status page shows their brand, no white-label.
- /angle · 03
If you only need 'is it up?' alerts — UptimeRobot's free tier is unbeatable. If you sell monitoring as a service to clients, Pleenx is the only fit.
Side-by-side
All values from public pricing/docs at the time of writing. Refresh quarterly. If something here is wrong or has changed, tell us — we'll fix it.
| Feature | Pleenx | UptimeRobot |
|---|---|---|
| HTTP uptime monitoring | yes (daily/hourly/15min) | yes (5/3/1 min) |
| SSL + chain validation | yes | partial (expiry only) |
| WHOIS / domain expiry | yes | yes (paid) |
| DNS record snapshot + diff | yes | no |
| SEO health probes | yes | no |
| SPF / DKIM / DMARC | yes | no |
| Security headers + mixed content | yes | no |
| Core Web Vitals | yes | no |
| Status page | yes (Studio, branded) | yes (their brand) |
| White-label PDF reports | yes (Agency+) | no |
| Public REST API | yes (Studio) | yes |
| Free tier | 14-day trial | yes (50 monitors) |
| Cheapest paid | $29/mo · 25 domains | $8/mo · 50 monitors |
Which one to pick
- Truly free tier — 50 monitors with 5-minute checks, no credit card. Hard to beat at zero dollars.
- Extremely simple to set up — paste URL, get pinged when it 4xx/5xx.
- Status page generator included even on free tier.
- You bill clients monthly for site care and want a white-label tool.
- You want zero-credential external probes (no plugins or agents).
- You'd rather have agency-tuned alert defaults than configure thresholds yourself.
- You want SSL + WHOIS + DNS + SEO + email-auth + security-headers in one report.