| What it does | Find what is slowing your website down to the file, then prove the fix worked
| Real-time monitoring for website performance, reliability and uptime
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| PL
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| Pricing model | Not given
| Freemium
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| Pricing | Free: score, slow file, and a few problems; three checks daily. $5 for 20 credits (lab checks, verify fixes, file lookup, image download, code to paste). Pro Watch $19/mo includes 20 pages monitored, alerts, certificate warnings, 60 monthly credits. Agency $12 per site/month for up to 25 sites.
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| Key features | - Three-run performance measurement to distinguish real gains from score variance
- Identifies specific slow file causing performance issues
- Ranks fixes by potential performance point impact
- SSL certificate and domain expiry warnings
- CLI, MCP, and API access
- Headless Chrome testing on simulated slow 4G connection
- Scheduled daily or hourly performance checks with score history
| - 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
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| What makes it different | - Names the specific file causing slowness instead of generic checklists
- Three runs measure real performance gains vs random score movement
- Works from web, terminal, Cursor editor, or API without switching tools
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 26 ▼ −1 (down) since last check | 2 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 6 | 3 |
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| Citation Flow (Majestic) | 28 | 20 |
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| Referring domains (Majestic) | 19 | 9 |
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PafCore
PulseCare