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Open Source Performance Monitoring (APM) Tools using CSS

A curated collection of the best open source application Performance Monitoring tools for tracking application behavior. using CSS.

Unified observability for metrics, logs, traces, and more
  • Stars


    76,328
  • Last commit


    9 hours ago
  • License


    AGPL-3.0
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.

Open Source Alternative to:

Real-time monitoring for systems and applications
  • Stars


    80,242
  • Last commit


    9 hours ago
  • License


    GPL-3.0
Powerful, efficient, and user-friendly monitoring solution for servers, containers, and applications with instant insights and alerts.

Open Source Alternative to:

Real-time error tracking and performance monitoring
  • Stars


    44,581
  • Last commit


    9 hours ago
  • License


    Unknown
Detect, diagnose, and resolve software issues quickly with powerful error tracking, performance monitoring, and release management.

Open Source Alternative to:

Petabyte-scale observability, without the massive bill.
  • Stars


    21,354
  • Last commit


    10 hours ago
  • License


    AGPL-3.0
Monitor logs, metrics, and traces with an open-source observability platform. Achieve petabyte scale with 140x lower storage costs and high performance.

Open Source Alternative to:

Beautiful open-source monitoring for modern infrastructure
  • Stars


    10,638
  • Last commit


    11 hours ago
  • License


    AGPL-3.0
Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.

Open Source Alternative to:

Self-hosted session replay with complete data control
  • Stars


    12,531
  • Last commit


    18 hours ago
  • License


    AGPL-3.0
Open-source session replay and product analytics platform you can self-host for complete control over data security, privacy, and compliance.

Open Source Alternative to:

Full-stack observability without the enterprise price tag
  • Stars


    9,846
  • Last commit


    10 hours ago
  • License


    MIT
Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.

Open Source Alternative to:

Real-time observability for modern web applications
  • Stars


    9,366
  • Last commit


    1 day ago
  • License


    Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.

Open Source Alternative to:

Full-stack observability without code changes
  • Stars


    7,881
  • Last commit


    2 days ago
  • License


    Apache-2.0
Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.

Open Source Alternative to:

Comprehensive monitoring and incident management platform
  • Stars


    7,487
  • Last commit


    10 hours ago
  • License


    Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly

Open Source Alternative to:

Powerful observability made simple for developers
  • Stars


    4,430
  • Last commit


    10 hours ago
  • License


    MIT
Logfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.

Open Source Alternative to:

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