Companies based in Pittsburgh

Duolingo, Inc. is an American educational technology company that produces learning apps and provides language certification. Duolingo offers courses on 42 languages, ranging from English, French, and Spanish to less commonly studied languages such as Welsh, Irish, and Navajo, and even constructed languages such as Esperanto and Klingon. It also offers courses on music, math, and chess. The learning method incorporates gamification to motivate users with points, rewards and interactive lessons featuring spaced repetition. The app promotes short, daily lessons for consistent, phased practice.

Alcoa Corporation (an acronym for "Aluminum Company of America") is an American industrial corporation that produces aluminum. According to industry rankings, it is among the largest producers globally. The company operates in 10 countries and is involved in mining, refining, smelting, fabricating, and recycling aluminum products.

1973-2001 aerospace manufacturer

former global oil company

North American bank

American clothing, shoes, and accessories retailer

Nutrition supplements business

American space robotics company

was one of the world's largest money management firms

record label

commercial internet chess server for play and discussion of chess

Ore-Ida (; ) is a brand of potato-based frozen foods owned by Kraft Heinz's H.J. Heinz Company Brands LLC, which is based in Pittsburgh, Pennsylvania.

defunct U.S. airline (1952–1979)

software company

holding company

American industrial company

'''Kaufmann's''' was a department store that originated in Pittsburgh, Pennsylvania.