The best Rails static analysis tools

Coverity

Synopsys Coverity supports 20 languages and over 70 frameworks including Ruby on rails, Scala, PHP, Python, JavaScript, TypeScript, Java, Fortran, C, C++, C#, VB.NET.

c
cpp
csharp
fortran
java
javascript
php
python
rails
scala
typescript
vbnet

dawnscanner

A static analysis security scanner for ruby written web applications. It supports Sinatra, Padrino and Ruby on Rails frameworks.

ruby
rails