TS vs DUOL Comparison

Tenaris is one of the largest global producers of oil country tubular goods, which are used primarily in the construction of oil and gas wells. Its production facilities are located primarily in the US, Argentina, Mexico, and Italy. Tenaris' premium OCTG products are among the most trusted by oil companies for use in the most challenging applications, including deep-water offshore wells and horizontal shale wells.

Duolingo Inc is a technology company that develops a mobile learning platform to learn languages and is the top-grossing app in the Education category on both Google Play and the Apple App Store. Its products are powered by sophisticated data analytics and artificial intelligence and delivered with class art, animation, and design to make it easier for learners to stay motivated master new material, and achieve their learning goals. Its solutions include the Duolingo Language Learning App, Super Duolingo, Duolingo English Test: AI-Driven Language Assessment, Duolingo For Schools, Duolingo ABC, and Duolingo Math. It has four predominant sources of revenue; time-based subscriptions, in-app advertising placement by third parties, and the Duolingo English Test, and In-App Purchases.