Domain Locker vs Checkly

All-in-one tool for keeping track of your domain name portfolio

Track all your domain names in one place. Monitor expiry dates, DNS records, SSL certificates, WHOIS data, and hosting info. Get alerts before domains expire. Self-hosted, privacy-first, and built for developers and businesses managing multiple domains who are tired of checking registrar dashboards one by one.

Monitoring for the modern DevOps stack

Checkly lets you monitor your APIs and web apps at scale. Synthetic monitoring, API checks, and browser checks with Playwright — from code.