M3 stands out as the ideal selection for Cloud Native enterprises that aim to enhance their Prometheus-based monitoring frameworks. Serving as a Prometheus Remote Storage solution, M3 boasts complete compatibility with PromQL, ensuring seamless integration. Initially created at Uber, M3 was designed to offer comprehensive insights into the company's operations, microservices, and infrastructure. Its remarkable capability to scale horizontally allows M3 to function as a unified storage solution for diverse monitoring scenarios. The system maintains data integrity through three replicas and employs quorum reads and writes for consistency. M3 has demonstrated its effectiveness in production environments, managing to ingest over one billion data points every second and facilitating more than two billion data point reads in the same timeframe. Additionally, it is open-sourced under the Apache 2 license and is supported by a vibrant and engaged community, which contributes to its ongoing development and improvement. This makes M3 not just a robust solution, but also a collaborative effort that continues to evolve.