Scout is Ruby on Rails monitoring that helps you find the source of performance woes and the humans that know how to fix them, with ease.

When you integrate Scout with GitHub, your transaction traces captured by Scout are overlaid with data from GitHub. Map slow lines-of-code to the commit, author, and deploy behind them.

Zoom into performance woes

With the scout_apm gem installed in your app, Scout instruments all of your controller-actions and background jobs, breaking down the time spent in each layer (Middleware, ActiveRecord, Redis, etc).

When you see a performance issue, you can quickly zoom into Scout's GitHub-annotated transaction traces.

Track performance issues to code authors

Instrumenting what's slow is half the performance battle: Scout annotates transaction traces collected from your app's controller-actions and background jobs with data from GitHub. See the critical context behind your app's bottlenecks: when did the code change? what developers contributed to the code? when was it deployed?

Profiles your custom Ruby classes and methods

Scout's profiler gives complete visibility to your app's performance: in addition to instrumenting popular Ruby libraries, your custom hand-written Ruby classes and methods are profiled with no configuration on your part.

This custom code, which is often complex, is annotated with data from GitHub as well. With Scout+GitHub, you'll have unparalleled visibility into the flow of complex app code and the developers that know most about it.

Rails Development Profiler

Once the scout_apm gem is installed, you'll have access to our free development profiler, DevTrace. Prevent performance issues from even reaching production.

Get started for free

Get going with either a free plan (limited data retention) or a full-featured paid Scout plan. Either way, enjoy a credit-card free 14-day trial of Scout. Start monitoring your Rails app at scoutapp.com.