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Open Source Performance Monitoring (APM) Tools using Testing Library

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

Grafana

Unified observability for metrics, logs, traces, and more

  • Stars

    77,581

  • Last commit

    7 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:

DataDog

Sentry

Real-time error tracking and performance monitoring

  • Stars

    45,682

  • Last commit

    7 hours ago

  • License

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

Open Source Alternative to:

DataDog

SigNoz

Open-source observability platform for cloud-native apps

  • Stars

    32,480

  • Last commit

    10 hours ago

  • License

    MIT
Comprehensive monitoring and troubleshooting solution for microservices architectures, offering metrics, traces, and logs in a single pane.

Open Source Alternative to:

DataDog

HyperDX

Full-stack observability without the enterprise price tag

  • Stars

    9,979

  • Last commit

    13 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:

DataDog

Highlight

Real-time observability for modern web applications

  • Stars

    9,385

  • Last commit

    7 days 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:

DataDog

OneUptime

Comprehensive monitoring and incident management platform

  • Stars

    7,771

  • Last commit

    7 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:

DataDog

Maple

OpenTelemetry observability with traces, logs, and metrics

  • Stars

    Stars growing over the last 30 days1,926

  • Last commit

    7 hours ago

  • License

    Unknown
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.

Open Source Alternative to:

DataDog
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