# scouter-project/scouter

Scouter is an open source APM (Application Performance Management) tool.

Repository: https://github.com/scouter-project/scouter
Canonical: https://ross.abutalabs.com/products/scouter
Language: Java
License: NOASSERTION
License Family: other
Topics: scouter, apm, java-application, monitoring, performance, performance-monitoring, asm, bytecode, bci, performance-metrics, agent, metrics, scouter-series, tomcat
Last push: 2026-03-01T23:36:55+00:00

## Health v2 (maintenance only)
Score: 72/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 70, release rhythm 59, longevity 100
- inputs: {"age_days": 4109, "days_push": 185, "days_rel": 199, "gap_med": 35.0, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2180, forks 571 (observed 2026-08-28T04:06:23.161300+00:00)

## What it is
Scouter is an open-source Application Performance Management (APM) tool similar to New Relic or AppDynamics, using a Java agent to instrument web applications and a host agent for OS metrics. It collects user, service, and resource metrics and visualizes them via dashboards, XLog scatter charts, and alert plugins.

## Use cases
- monitor tomcat application performance
- open source alternative to new relic
- track response time and TPS of java services
- profile sql and method calls in production
- monitor server cpu memory and heap usage
- visualize distributed traces in a scatter chart
- set up custom performance alerts

## When to choose
- you run Java web applications on Tomcat, JBoss, or Resin and need APM without licensing costs
- you want self-hosted monitoring with Telegraf integration for Redis, nginx, Kafka, MySQL, and more
- you need Zipkin-compatible tracing data shown in scatter charts

## When to avoid
- your stack is primarily non-JVM and you don't use Telegraf or Zipkin instrumentation
- you prefer a fully managed SaaS APM with minimal setup
- you need first-class support for modern runtimes like Node.js, Python, or .NET agents

## Facets
- artifact type: application
- maturity: active
- function: monitoring, alerting, tracing, benchmarking
- domain: monitoring, performance, backend
- platform: jvm, windows, self-hosted, cross-platform
- tags: apm, java-agent, bytecode-instrumentation, tomcat, telegraf, zipkin, performance-metrics, xlog-scatter-chart, devops, linux

## Member repositories
- scouter-project/scouter (main) score 72

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:23.161300+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:48:44.382335+00:00, confidence not recorded.
  - readme: https://github.com/scouter-project/scouter (fetched 2026-08-28T04:06:23.161300+00:00, sha 473739705d80)
- Data as of 2026-08-30T08:39:29.467469+00:00.