10 Best Free Uptime Monitoring Tools in 2026 (Compared)

By Engineering Team | 2026-06-06 | Comparisons

Every website needs uptime monitoring. But not every team needs to pay $20-50/month for basic checks.

We tested 10 uptime monitoring tools, focusing on their free tiers. Here's what we found.

How We Tested

We evaluated each tool on number of free monitors, check frequency, alert channels available, status page support on free tier, and ease of setup.

1. UptimeSaaS — Best Overall Free Tier

Free monitors: 25

Check interval: 5 minutes

Status pages: 1 free with custom domain

Alerts: Email, WhatsApp, Slack, Discord, Webhooks

UptimeSaaS's free tier stands out because WhatsApp alerts are included and the free plan includes a custom domain status page.

Verdict: Best value for individuals and small teams. No credit card required.

2. UptimeRobot — Established Player

Free monitors: 50

Check interval: 5 minutes

Status pages: 1 free (subdomain only)

Alerts: Email, SMS (paid), Slack, Telegram

UptimeRobot has been around forever. Their 50-monitor free tier is generous, but their interface feels dated and SMS alerts cost extra.

Verdict: Good for basic needs. Limited alert options on free tier.

3. BetterStack — Modern Alternative

Free monitors: 3

Check interval: 1 minute

Status pages: 1 free

Alerts: Email, Slack, PagerDuty

BetterStack has a beautiful interface, but 3 free monitors is very limited.

Verdict: Beautiful UI, but free tier is too restrictive.

4. Pingdom — Enterprise Standard

Free monitors: 0 (14-day trial only)

Status pages: Not on trial

Pingdom doesn't have a free tier. Cheapest plan starts at $15/month.

Verdict: No free option. Good for enterprises with budget.

5. Site24x7 — Feature-Rich

Free monitors: 10

Check interval: 5 minutes

Status pages: Not on free tier

Alerts: Email, SMS (paid)

Site24x7 offers 10 free monitors but limits key features to paid plans.

Verdict: Decent free tier but aggressive upsells.

Free Tier Comparison

|------|--------------|----------------|-------------|-----------------|

| UptimeRobot | 50 | 5 min | Subdomain only | No |

| BetterStack | 3 | 1 min | Yes | No |

| Pingdom | Trial only | — | No | No |

| Site24x7 | 10 | 5 min | No | No |

The Bottom Line

If you want generous free limits and WhatsApp alerts, UptimeSaaS is the clear winner. If you need 50+ free monitors and don't care about modern features, UptimeRobot works.

Start monitoring free — 25 monitors with WhatsApp alerts included.

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