With the experience of building dozens of major web applications, we started building TrackJS. Our company was bootstrapped, built with our sweat, tears, and belief that we could make the web better. Our first innovation was the Telemetry Timeline: the idea that network, console, and user events that happened before the error were incredibly valuable to developers for debugging.
Years later, and we've built TrackJS into a stable error monitoring system used by some of the biggest sites on the internet. Our system has focused on simplicity in its design, and simplicity in its use, because every web developer should be able to understand their bugs.