Is Udemy legit?
Yes, Udemy is a legitimate, established platform: payments are safe and you get a 30-day money-back guarantee. Do watch the varying quality between courses, since anyone can teach there. Always read the recent reviews before you buy.
Udemy has been around since 2010, is publicly traded, and serves tens of millions of learners. As a company it is entirely trustworthy: your payment is safe, purchased courses stay accessible for life, and the 30-day money-back guarantee is honored without drama.
The caveat is the model: Udemy is an open marketplace where any instructor can publish. Next to excellent courses by practitioners sits outdated or shallow material. You vet quality yourself: check the number of ratings, the recent reviews, and the date of the last course update; with technical topics, that last one is crucial.
One more tip: never pay full price. Udemy runs near-permanent sales where courses listed at $90-plus go for the price of lunch. If you see a course at full price, wait a few days or search for the promo.