Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Sorry App - Turn outages into opportunities
Downtime Bot for Telegram - Get alerts when your site gives errors via a Telegram Bot 🤖
Freshworks - Delight your customers, from wherever you are
Monkey Test It - Primate powered algorithms that scan your site for common bugs and SEO mistakes.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.