Keymetrics develops Application Performance Monitoring services dedicated to NodeJS : 1- PM2 runtime, an open source software that ensures the availability of your Node.js application 24/7 and that has been downloaded 60M times 2 - PM2 Plus, a SaaS solution to monitor, optimize and debug in real time your production Node.js applications, currently used by more than 1000 customers 3 - PM2 Enterprise, a custom solution for Node.js needs at scale