DebugBear

DebugBear is a web performance monitoring service focused on page speed and Core Web Vitals. It combines synthetic tests run on a schedule, Google CrUX data and real user monitoring (RUM) collected from site visitors, with analysis and recommendations for each page.

Synthetic tests record lab metrics and can be used to compare page versions through experiments. Uptime monitoring with alerts is also included, as well as an API and integrations such as Looker Studio.

DebugBear is a commercial service sold by monthly subscription, based on the number of synthetic tests and RUM page views, with a free trial. An enterprise plan adds single sign-on and custom data retention.