| What it does | Real-time monitoring for website performance, reliability and uptime
| Know the second your site goes down
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| Stage | Not given
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| Founded | Not given
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| Based in | PL
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| Pricing model | Freemium
| Freemium
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| Pricing | Not given
| Free: 50 monitors, all 9 monitor types, 5-minute checks, email/webhook/Slack/Discord alerts, no credit card required. Add-ons: $25/month for 5 additional notification contacts, $50/month for 50 additional monitors, $25/month for Server Monitoring (disk, CPU, memory). Pro plan in development with 1-m
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| Key features | - Lighthouse audits from desktop and mobile with side-by-side scoring
- Uptime monitoring with 99.999% SLA
- Core Web Vitals tracking including LCP, CLS, FCP, INP
- Deploy regression detection comparing before and after release metrics
- Multi-region monitoring from 12 regions across every major continent
- Per-region response time analysis with P90, P95, P99 percentiles
- Frontend error tracking grouped by release and browser
- SSL and domain expiry monitoring with 30-day advance warning
- Flexible alerting rules combining status code, response time, body content and SSL expiry
- Multi-channel alerts via email, Slack, Discord, Telegram and webhooks
| - HTTP and HTTPS monitoring with status codes and response time tracking
- Keyword monitoring to detect content changes or missing text
- Ping monitoring for server reachability
- Port monitoring for TCP services and custom ports
- Heartbeat monitoring for cron jobs and background workers
- SSL certificate expiry warnings before HTTPS breaks
- DNS record monitoring for hijacking and changes
- Content change detection with line-by-line diffs
- Alerts via email, Slack, Discord and webhook
- REST API and MCP server for programmatic access
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| What makes it different | - Automatically surfaces regressions within minutes of deployment rather than discovering them through support tickets
- Breaks down page weight by transfer size to show exactly which images are slowing load times
- Automatically surfaces noisy details like console errors and unhealthy JS libraries
- Checks from multiple regions so you catch outages before users do
- First alert in under 60 seconds from monitor creation
| - 9 monitor types on free plan including HTTP, keyword, ping, port, heartbeat, SSL, domain, DNS and content change detection
- 50 free monitors with no credit card required
- Two-failure confirmation prevents false alarms from single blips
- Maintenance windows to pause checks during planned deploys
- Response time tracking and incident timeline for every outage
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▲ +1 (up) since last check | 23 ▲ +7 (up) since last check |
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| Trust Flow (Majestic) | 3 | 1 |
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| Citation Flow (Majestic) | 20 | 18 |
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| Referring domains (Majestic) | 9 | 3 |
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PulseCare