Sites and apps similar to Sentinel | Uptime Monitoring include Uptime Kuma, which is free and open source. Other options are UptimeRobot, Pingdom, StatusCake and Pulsetic. You can choose from more than 10 Uptime Monitor Services like Sentinel | Uptime Monitoring for Android, iPhone, iPad, self-hosting and Linux.
Self-hosted monitoring tool to track uptime via HTTP(s), TCP, Ping, and more with reactive design. Offers 20-second interval checks, notifications through various channels like Webhook, Telegram, supports multiple languages, includes status page and ping charts, aiding small to medium enterprises effectively.
Hong Kong SAR China
Free real-time monitoring for 50 sites every 5 minutes. Custom alerts through email, SMS, calls, and apps like Slack, PagerDuty, and more. Use status pages and mobile apps for easy management.
Slovakia
EU
Tracks uptime, downtime, and page speed with synthetic and real user monitoring, simulates critical flows, analyzes visitor data by location, device, and browser, sends instant alerts, and provides analytics and reporting to troubleshoot and optimize sites.
United States
Provides uptime, performance, and page speed monitoring for up to 10 websites. Offers customizable alerts by email, SMS, or third-party apps, root cause analysis, mobile support, server and SSL checks, plus a free plan with detailed reports for diagnostics.
United Kingdom
Receive detailed website downtime alerts by phone, SMS, email, or Slack, monitor uptime and performance in real time from global data centers, avoid false positives, create customizable status pages, generate incident management and performance reports.
Ukraine
Real-time monitoring with checks every minute from over 30 global locations, alerts for outages or slowdowns, detailed uptime and response time reports, customizable alerts, public status pages, SSL and domain monitoring, and REST API for automation.
United States
Open-source observability platform providing uptime monitoring, alerts, incident management, status pages for transparency, log and error tracking, performance and security monitoring, automated API testing, on-call rotation, and integrated root-cause analysis for operations teams.
India
India
UpTimeLine checks that your websites are online and notifies you in case of downtime. Get up to 20 monitors checked every 5 minutes for free. All HTTP methods, custom body and headers, regex check on response body, SSL certificate monitoring and more.
All-in-one server monitoring, service monitoring, database monitoring, uptime monitoring, app metric monitoring and alerting. Fast setup. Easy to use.
United States
UptimePal offers an affordable website monitoring service. For only $1/month per URL, you get 1-minute uptime monitoring, alerting software, & performance test tools - all from a robust worldwide monitoring network.
FlareWarden is uptime monitoring built for small businesses, freelancers, and agencies who need reliable alerts without the complexity of enterprise observability platforms.
United States
