Sentry, an open-source error monitoring platform, has raised $40 million in Series C funding to accelerate product development and marketing efforts. The company aims to rethink application performance monitoring (APM) by addressing the growing need for monitoring software that runs on customer devices, such as mobile apps and IoT devices. With the rise of JavaScript-based Single Page Applications (SPAs), Sentry plans to push innovation in the application space, providing holistic application monitoring and actionable insights to developers. The company's vision is to empower developers to debug native applications faster with alerts, context, and root-cause analysis, while emphasizing its focus on making developers' lives easier. With this funding, Sentry will continue to grow its team and expand its product offerings, aiming to become the market-leading error monitoring platform for developers building better software, faster.