UptimeRobot is a widely used uptime-monitoring tool founded in 2010 by Daniel Rimille and Umut Muhaddisoglu, best known for offering one of the most generous free tiers in the category (up to 50 monitors at 5-minute intervals). It was acquired by Itrinity, a Czech/Slovak SaaS holding group led by CEO Michal Aftanas, in late 2019, and now operates alongside sibling products like Mangools and GeoTargetly. UptimeRobot does not publicly disclose revenue and operates as a lean team (reported around 16 employees in 2026) focused on converting a very large free-tier user base into paid Solo/Team/Enterprise subscribers.