Side by side
DownNotifier.com vs Perfmatters
Both stand on website monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIWeb
DownNotifier.com combines website availability checks with content, SSL, and email-record validation. Its plans specify different site limits and monitoring intervals, and users should note how monitor URL passwords are handled.
Visit DownNotifier.com Paid Self-hosted
Perfmatters provides detailed WordPress performance controls across scripts, databases, media, and CSS. Review the yearly renewal terms and the absence of monitoring features alongside the optimisation toolkit.
Visit PerfmattersThe facts
| DownNotifier.com | Perfmatters | |
|---|---|---|
| Free plan | Yes | No |
| Open source | Not published | Not published |
| Runs on | API, Web | Self-hosted |
| Lowest paid plan | PREMIUM: $14.95 a year | 1 Site – Personal: $29.95 a year |
| Plans published | 3 | 3 |
| Maker | Not published | Not published |
| Website | downnotifier.com | perfmatters.io |
| On website monitoring software | #8 of 55 | #51 of 55 |
DownNotifier.com: what it does well
- Alerts on connection errors and specified HTTP status codes.
- Can check for missing text on monitored pages.
- SSL checks run once per hour.
- Free tier covers five websites with 10-minute checks.
- API documentation is linked from the site.
What to know first
- Free-tier SMS alerts require credits.
- Free monitoring checks every 10 minutes.
- Passwords in monitor URLs are visible when editing monitors.
- DKIM validation requires sending a test email.
Perfmatters: what it does well
- Per-page and device script controls
- Scheduled database cleanup
- Lazy loads multiple media types
- Supports WebP and AVIF
- Includes developer support and documentation
What to know first
- Paid self-hosted WordPress plugin
- Licenses renew yearly
- Auto-renew is enabled by default
- No SSL or latency monitoring
Alternatives to DownNotifier.com Alternatives to Perfmatters The whole list