Founded in 2016 in Boston, Massachusetts, LogRocket is a frontend monitoring and session replay platform for web developers that captures console logs, network requests, Redux/Vuex state, and performance metrics, with 1,000 recorded sessions free per month.
UptimeRobot, founded in 2010 and headquartered in Istanbul, Turkey, is one of the most widely used free website uptime monitoring platforms globally. The free tier monitors 50 sites with HTTP/Ping/Port/SSL checks, trusted by over 2 million users.
Sentry, founded in 2008 and headquartered in San Francisco, is the leading open-source error tracking and performance monitoring platform serving 100,000+ teams. It supports 40+ language SDKs, APM distributed tracing, and Session Replay, with both SaaS and self-hosted deployment.
Pingdom is a SolarWinds-owned website monitoring service founded in 2007 in Stockholm, Sweden, offering 100+ global node availability checks and page speed analysis for operations teams.
Site24x7 is Zoho's all-in-one website and application monitoring platform, offering website, server, application, cloud, and real-user monitoring with AI alerting and multi-location global monitoring nodes to help teams ensure availability and performance.
Raygun, founded in 2013 and headquartered in Wellington, New Zealand, is an application performance platform combining crash reporting, APM, and real user monitoring in a unified solution with SDKs for iOS, Android, and Web.
Founded in 2020, Highlight is an MIT-licensed open-source full-stack observability platform combining session replay, error tracking, log management, and performance monitoring. With 8,000+ GitHub Stars and self-hosted deployment, it is ideal for frontend and full-stack web teams.
StatusCake is a UK-based website monitoring service founded in 2014, offering free uptime monitoring, SSL expiry alerts, domain expiry tracking, and status pages for personal site owners and small businesses.