Security Analysis
Lightbend has partnered with Micro Focus to create a product to scan your code for security issues - the Fortify Scala plugin. You can check out the documentation on the Lightbend Tech Hub. The Fortify Scala plugin is included as part of your subscription but a separate license for Fortify itself is needed to effectively use the plugin, should you have any questions or need assistance Lightbend Support would be happy to help.
Other than the above for security analysis, Lightbend does not recommend a specific static or dynamic analysis tools, but here are some we've seen in the community.
Code Quality
Test Coverage
Code formatters