Best Application Performance Monitoring (APM) Software for Linux

New Relic Application Performance Monitoring simplifies application performance management with a unified platform that delivers real-time insights across your entire tech stack. Designed for enterprise needs, it empowers leaders to monitor app performance, improve reliability, and enhance end-user satisfaction. With fully-integrated features like code-level visibility, AI-powered alerts and DEM, and new innovations like AI Monitoring and Transaction 360, teams can proactively identify and resolve issues before they impact users. Streamline performance tracking, consolidate tools and optimize resources, to confidently accelerate digital transformation. Upgrade to New Relic APM today and stay ahead of application challenges.

Grafana Labs provides an open and composable observability stack built around Grafana, the leading open source technology for dashboards and visualization. Recognized as a 2025 Gartner® Magic Quadrant™ Leader for Observability Platforms and positioned furthest to the right for Completeness of Vision, Grafana Labs supports over 25M users and 5,000+ customers—including Bloomberg, Citigroup, Dell Technologies, Salesforce, and TomTom. The LGTM Stack combines Grafana for visualization, Mimir for metrics, Loki for logs, and Tempo for traces. Grafana Cloud, the fully managed offering, accelerates time to value with turnkey solutions for Kubernetes monitoring, incident response, load testing, and more. It features Adaptive Metrics for cost-efficient data aggregation and native OpenTelemetry support. Built on open standards, Grafana empowers teams to visualize and correlate data from any source—without vendor lock-in—whether self-managed or in the cloud. Grafana Cloud scales with you, securely.

Datadog is the monitoring, security and analytics platform for developers, IT operations teams, security engineers and business users in the cloud age. Our SaaS platform integrates and automates infrastructure monitoring, application performance monitoring and log management to provide unified, real-time observability of our customers' entire technology stack. Datadog is used by organizations of all sizes and across a wide range of industries to enable digital transformation and cloud migration, drive collaboration among development, operations, security and business teams, accelerate time to market for applications, reduce time to problem resolution, secure applications and infrastructure, understand user behavior and track key business metrics.

Splunk AppDynamics delivers full-stack observability for hybrid and on-prem environments, linking technical performance directly to business outcomes. It enables teams to detect anomalies, diagnose root causes, and prioritize issues based on their real business impact. With capabilities ranging from network performance correlation to SAP system optimization, the platform offers deep insights across applications, APIs, and infrastructure. Its runtime security features safeguard applications by detecting vulnerabilities, blocking attacks, and highlighting potential risks. AppDynamics also enhances digital experiences with web, mobile, and synthetic monitoring to understand user journeys. By unifying performance, security, and business analytics, Splunk AppDynamics helps enterprises reduce costs, prevent outages, and deliver seamless customer experiences.

Leading innovation in the Quality of Experience (QoE) industry, Witbe offers an award-winning approach to monitor the QoE delivered to users of any interactive service (telephony, video, Web), on any device (PC, smartphone, STB), and through any network (fixed, mobile, OTT). Since its foundation in 2000, Witbe has continually grown and is now trusted by more than 300 clients in 50 different countries. Broadcasters, Operators, Content Providers & App Developers, all rely on Witbe Robots to ensure flawless services. Witbe is a public company listed on Euronext Growth (ALTWIT.PA) and has offices all around the world, including locations in Paris, New York, San Jose, Denver, Montreal, London, and Singapore.