Chegg
“Chegg spent two decades becoming the indispensable study buddy for millions of students, building a $3 billion empire on the simple premise that homework is hard and textbooks are expensive. The problem is that ChatGPT now solves calculus problems in 0.3 seconds for free, while simultaneously explaining the underlying concepts better than any step-by-step solution Chegg ever commissioned — and it doesn't charge $19.95 a month for the privilege.”