OpsKitty - Uptime and speed monitoring for websites
OpsKitty runs HTTP and API checks from 29 regions, at intervals from 5 minutes on the free plan down to 15 seconds. Each site also gets scheduled Lighthouse audits with LCP, INP and CLS history, plus SSL expiry checks. Failures alert through email, Slack, Discord, PagerDuty, Teams or Telegram, and the Pro plan adds webhooks and escalation rules. Status pages are built in. 50+ free SEO tools, such as a redirect chain analyzer, need no account.