AlertSleep - uptime monitoring
24/7 uptime monitoring with instant SMS, call, email, and Slack alerts
Freemium - Free forever with up to 5 monitors. Paid plans available for more monitors, advanced checks and higher frequency; no credit card required to start.
About AlertSleep - uptime monitoring
AlertSleep monitors websites, APIs and infrastructure 24/7 and notifies you within ~60 seconds via SMS, phone call, email or Slack. Features include global uptime checks, API health checks, page speed & Core Web Vitals tracking, SSL expiry monitoring, response-time metrics and incident reporting. Security includes 256‑bit encryption. Free plan includes 5 monitors forever; paid tiers scale for higher volume and advanced features. Trusted by thousands with 10M+ checks/month.
Key Features
- Instant alerts via SMS, phone call, email and Slack within ~60 seconds
- Website and API monitoring with global checks and response-time metrics
- Page speed & Core Web Vitals monitoring
- SSL certificate expiration tracking
- Free plan: 5 monitors forever; scalable paid plans
Who is this for?
Developers, DevOps, SREs, and businesses who need continuous uptime and performance monitoring.
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FreemiumFree forever with up to 5 monitors. Paid plans available for more monitors, advanced checks and higher frequency; no credit card required to start.
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