I was planning to attend a couple of online courses on multiple subjects (including academic contents, Artificial intelligence and Programming) and currently, online courses are more reasonable to take. I have heard of a couple of providers like Leakedin Learning (Lynda), Coursera, Pluralsight, etc. I would like to know which of these providers are more valid in the case of certification and offers better content? Also, I would appreciate it if someone suggests a better option. Thank you all