Sourcetrail is described as 'Software developers spend up to 70 percent of their time figuring out how existing source code works, but common code editing tools offer little help for this task. Sourcetrail helps software engineers explore and navigate unknown source code quickly and thoroughly by combining' and is an app in the development category. There are nine alternatives to Sourcetrail for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and Web-based apps. The best Sourcetrail alternative is Woboq Code Browser, which is free. Other great apps like Sourcetrail are Source Insight, Understand, Blink grep and CodeCompass.
Understand has nearly same functionality, but supports much more languages (Python, JS, Pascal, Assembly, PHP & more).