When comparing Udemy vs Udacity, the Slant community recommends Udacity for most people. In the question“What are the best websites to learn to code?” Udacity is ranked 3rd while Udemy is ranked 9th.
Ranked in these QuestionsQuestion Ranking
Pro Wide range of courses
If one course doesn't meet your needs, there is a sea of other courses to choose from.
Pro Offers intermediate and advanced courses
Udemy offers plenty of courses for beginner programmers, but also has a large variety of more advanced courses to choose from.
Pro Some courses are free
Pro Friendly community
Both on site and on various social networks Udemy aims to create a community of friendly people that can help each other out.
Pro Courses available in over 80 languages
Pro Courses taught by industry professionals
Pro All courses are self-paced
Courses are always made available which means there is no waiting for the specific course you want to run. You can work through the courses as fast or as slow as you want.
Pro Offers Nanodegrees
Udacity offers a few different Nanodegrees which provide access to various different courses, project reviews and coaching support for $200/month.
Current options include Front End Web Developer, Data Analyst and Android Developer. See the full list here.
Pro Courses are easy to understand
Pro Actual feedback on coding projects
You get actual feedback from developers on your code, which is useful. Yes having your sites/apps do what it is supposed to do is important, but you need feedback to learn industry standards/best practices and other gotchas that are much harder to learn on your own.
Con Quality varies
The quality control for the content offered is fairly limited. As there are so many different instructors offering courses on Udemy, many of which lack formal training and teaching experience since anyone can be a teacher on Udemy, the quality varies quite a bit between the different courses.
Con Most courses are expensive
While Udemy does offer free courses, most of them are around $100.
Con Difficult to take multiple (10+) courses at the same time
The system becomes messy and hard to follow if you plan on using the site to learn more than a handful of things at once.
Con Nanodegrees are expensive
Udacity is quite expensive at $200/month if you want to do a nanodegree.