Free Uptime Monitoring: Best Options in 2026 (Tested & Compared)

What to Look for in a Free Uptime Monitoring Tool

Not all "free" uptime monitoring tools are created equal. Some offer 50 free monitors but lock everything useful behind a paywall. Others have generous free tiers but no SMS alerts. Before comparing tools, here's what actually matters in a free offering:

• Number of monitors: How many URLs/APIs can you track?
• Check interval: How often does it check? 5 minutes vs. 1 minute makes a huge difference in detection speed
• Alert channels: Email only, or also SMS/Slack/webhook?
• Status page: Can you share a public status page with your users?
• Data retention: How much history can you view?
• SSL monitoring: Does it alert you before your certificate expires?
• Card at sign-up: Do you have to hand over payment details just to start?

1. UptimeRobot — Best Free Monitor Count

UptimeRobot free tier: 50 monitors, 5-minute checks, 1 status page, no SMS or voice call alerts included

UptimeRobot has been around since 2010 and offers the most generous free monitor count. 50 monitors is more than most small teams will ever need. However, SMS and voice call alerts are not included on UptimeRobot's free tier (they can be bought as credit packs), and paid plans include only a limited number of SMS/voice credits. UptimeRobot's free tier includes one public status page.

What's great:

• 50 free monitors — UptimeRobot has the best free tier by volume
• Long established, reliable service
• Integrations with Slack, Telegram, webhooks on UptimeRobot's free tier

Limitations:

• Only 1 status page on UptimeRobot's free tier
• No SSL monitoring on UptimeRobot's free tier
• UptimeRobot's SMS and voice call alerts run on credits — none on its free tier, a limited allowance on paid plans, packs cost extra
• Interface feels dated

Best for: Personal projects and developers who need to monitor many URLs but don't need SMS or phone call alerts.

What about Freshping? Freshping used to be a popular free option, but Freshworks shut it down on 6 March 2026: free accounts were disabled and plans are no longer renewed. It is no longer an option.

2. StatusCake — Best All-Around Free Tier

StatusCake free tier: 10 uptime monitors, 5-minute checks, 1 SSL monitor, 1 page speed monitor, 1 domain monitor, email/Slack alerts

StatusCake offers a balanced free tier with a clean interface. The UK-based tool has been reliable for years. StatusCake's free tier is decent but not standout — 10 uptime monitors plus a single SSL, page speed and domain monitor. More of those, and faster checks, require paid plans.

What's great:

• Clean, modern interface
• Good API for programmatic monitor management
• Slack integration on StatusCake's free tier

Limitations:

• Only 1 SSL monitor on StatusCake's free tier
• 5-minute checks only — 1-minute checks need a paid plan
• Smaller feature set than competitors at the free tier

Best for: Teams who want a clean interface and don't need checks more often than every 5 minutes.

3. HetrixTools — Best for Technical Users

HetrixTools free tier: uptime and blacklist monitoring, email alerts

HetrixTools targets developers and system administrators with a technically rich feature set. The HetrixTools free tier includes uptime and blacklist monitoring. The interface is more technical than the others, which is a pro for experienced users.

What's great:

• Blacklist monitoring included free
• Good API
• Server monitoring (VPS/dedicated) available

Limitations:

• Interface less polished than competitors
• Smaller community and fewer integrations

Best for: Technical users who also need server and blacklist monitoring.

When Free Isn't Enough: AlertSleep

AlertSleep is not a free monitoring tool — it is the low-cost paid option. What it gives away for free is a set of free tools that need no account: an uptime checker, SSL checker, DNS and MX lookup, port checker, response time test, domain expiry check and more. They answer "is it up right now?" in seconds.

For 24/7 monitoring, AlertSleep's Studio plan costs $59 a year — under $5 a month — and Business $99 a year. Both come with a 14-day trial, no card required.

What you get on every plan:

• 1-minute checks
• SMS and phone call alerts included in the plan price (a monthly allowance) — no credit packs to buy
• Public status pages
• SSL certificate monitoring
• Failures confirmed from a second location before you are alerted

Best for: Anyone who has outgrown email-only alerts and wants SMS, calls and a status page for less than most tools charge per month.

Free Uptime Monitoring Comparison Table

Here's a side-by-side of the three free tiers:

• UptimeRobot: 50 monitors / 5-min / Email, Slack / Status page ✓ (1) / SSL ✗ / No CC needed
• StatusCake: 10 monitors / 5-min / Email, Slack / SSL ✓ (1 monitor) / No CC needed
• HetrixTools: Uptime and blacklist monitoring / Email / No CC needed

Which Free Uptime Monitoring Tool Should You Choose?

• Need 50+ free monitors? → UptimeRobot
• Need a one-off check without an account? → AlertSleep's free tools
• Need a status page, SMS or phone call alerts? → AlertSleep ($59 a year, all included, no add-on fees)

Try AlertSleep Free for 14 Days

Start with AlertSleep's free tools — no account needed. When you want 24/7 monitoring, every plan includes 1-minute checks, SSL monitoring, second-location confirmation of failures, a public status page, and SMS and phone call alerts included in the plan price.

Plans start at $59 a year — under $5 a month — and both come with a 14-day trial, no card required.

Start your 14-day trial today.