Looking for the best course to learn data structures and algorithms? I’ve compiled the best DSA courses to become a better coder or prepare for interviews.

Duolingo’s side business, Duo’s Taquería, has doubled its revenue to $1.3M in 2024

In January each year, Class Central publishes a list of the most popular online courses released by major course providers in the previous 12 months. The most popular course in the latest list turned out to be Google AI Essentials, launched by Coursera in April, 2024. More than 900,000 learners have enrolled, more than the combined total of all new courses launched on edX, FutureLearn, and Swayam in the same year. What’s even more surprising is that (unlike the vast majority of Coursera course

TL;DR Duolingo reported Q4 2025 revenue of $282.9 million (+35% YoY), closing its first billion-dollar year, breaking estimates again. The stock dropped 22.5% anyway. Again. The company plans to slow down monetization to grow to 100 million DAUs until 2028, by focusing on teaching quality, giving more to free users, and growing non-language courses. Duolingo’s Q4 2025 results confirmed something we highlighted in its 2025 review: growth is slowing. The company crossed a billion dollars in r

What if I told you that one man’s frustration with an elevator breakdown led to the creation of the fastest-growing and most-beloved programming languages today? Seventeen years ago, Graydon Hoare’s ordinary evening turned pivotal when an out-of-order elevator at his apartment building forced him to trek up 21 stories. A Mozilla software engineer, Hoare’s frustration wasn’t just with the climb, but with the fact that the tools of his trade couldn’t even make an elevator that works without cras

Google offers many online courses with free certificates and badges. We’ve put together a full list.