Duolingo

Duolingo
Headquarters	Pittsburgh, Pennsylvania
Founder(s)	Luis von Ahn, Severin Hacker
CEO	Luis von Ahn
Industry	Online education, Professional certification, Translation, Crowdsourcing
Services	Language courses, Duolingo Test Center, Duolingo for Schools
Slogan(s)	Free language education for the world
Website	duolingo.com
Alexa rank	869 (January 2017)
Advertising	yes
Registration	yes
Available in	Multilingual Arabic ; Bengali ; Chinese ; Czech ; Dutch ; English ; French ; German ; Greek ; Hindi ; Hungarian ; Indonesian ; Italian ; Japanese ; Korean ; Polish ; Portuguese ; Romanian ; Russian ; Spanish ; Swedish ; Tagalog ; Tamil ; Telugu ; Thai ; Turkish ; Ukrainian ; Vietnamese ;
Current status	Online

Duolingo is a free language-learning program.^[2] Its website and mobile apps can be used on iOS, Android, Windows 8 and 10 operating systems. Duolingo allows people to learn over 106 different language courses in 43 languages.^[3]^[4]

History

The project was started by Professor Luis von Ahn and graduate student Severin Hacker. The main development language used was Python.

Products and services

Courses

Language courses

Duolingo has 184 language courses teaching 42 languages.^[5]

Duolingo languages
For speakers of	Language course
Arabic	English, French, German, Italian, Spanish, Swedish
Bengali	English, French, German, Italian, Spanish
Chinese (Mandarin)	Chinese (Cantonese), English, French, German, Italian, Japanese, Korean, Spanish
Czech	English, French, German, Italian, Spanish
Dutch	English, French, German, Italian, Spanish
English	Arabic, Chinese (Mandarin), Czech, Danish, Dutch, English (Intermediate), Esperanto, Finnish, French, German, Greek, Haitian Creole, Hawaiian, Hebrew, High Valyrian, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Klingon, Korean, Latin, Navajo, Norwegian, Polish, Portuguese, Romanian, Russian, Scottish Gaelic, Spanish, Swahili, Swedish, Turkish, Ukrainian, Vietnamese, Welsh, Yiddish, Zulu
French	English, German, Italian, Portuguese, Spanish
German	English, French, Italian, Spanish
Greek	English, French, German, Italian, Spanish
Hindi	English, French, German, Italian, Spanish
Hungarian	English, French, German, Italian, Spanish
Indonesian	English, French, German, Italian, Spanish
Italian	English, French, German, Spanish
Japanese	Chinese (Mandarin), English, French, German, Italian, Korean, Spanish
Korean	English, French, German, Italian, Spanish
Polish	English, French, German, Italian, Spanish
Portuguese	English, French, German, Italian, Spanish
Romanian	English, French, German, Italian, Spanish
Russian	English, French, German, Italian, Spanish
Spanish	Catalan, English, French, German, Italian, Portuguese, Russian, Swedish
Swedish	English, French, German, Italian, Spanish
Tagalog	English, French, German, Italian, Spanish
Tamil	English, French, German, Italian, Spanish
Telugu	English, French, German, Italian, Spanish
Thai	English, French, German, Italian, Spanish
Turkish	English, French, German, Italian, Russian, Spanish
Ukrainian	English, French, German, Italian, Spanish
Vietnamese	Chinese (Mandarin), English, French, German, Italian, Spanish

Offices and workforce

Duolingo is headquartered in Pittsburgh, Pennsylvania, and has offices in Seattle, New York,^[6] Detroit,^[7] Beijing, and Berlin.^[8] Duolingo employs around 830 people.^[9]^[10]

References

↑ "Duolingo". Ranking. Alexa Internet. Archived from the original on January 9, 2019. Retrieved January 23, 2017.
↑ Jill Duffy (August 6, 2015). "Duolingo". PC Magazine. Retrieved December 21, 2015.
↑ "100M users strong, Duolingo raises $45M led by Google at a $470M valuation to grow language-learning platform". Venture beat. Retrieved June 21, 2015.
↑ "Duolingo – Learn Languages for Free". Windows phone. Microsoft. Archived from the original on July 2, 2015. Retrieved November 21, 2014.
↑ Matt (February 20, 2023). "The Complete List Of EVERY Duolingo Language". Duoplanet. Archived from the original on September 21, 2022. Retrieved March 4, 2025.
↑ Budds, Diana (September 5, 2024). "Inside Duolingo's stunning new NYC office, where employees get to choose where and how they work". Fast Company. Retrieved September 5, 2024.
↑ Perez, Sarah (July 9, 2024). "Duolingo acquires Detroit-based design studio Hobbes". TechCrunch. Retrieved July 22, 2024.
↑ "Duolingo Careers". careers.duolingo.com. Retrieved November 3, 2024.
↑ SeanColombo (September 27, 2024). "I'm not sure, we don…". r/duolingo. Retrieved September 28, 2024.
↑ Patel, Nilay (October 14, 2024). "Duolingo CEO Luis von Ahn thinks AI has a lot to teach us". The Verge. Retrieved November 2, 2024.

Other websites

Official website

[alexa-1] "Duolingo". Ranking. Alexa Internet. Archived from the original on January 9, 2019. Retrieved January 23, 2017.

[2] Jill Duffy (August 6, 2015). "Duolingo". PC Magazine. Retrieved December 21, 2015.

[3] "100M users strong, Duolingo raises $45M led by Google at a $470M valuation to grow language-learning platform". Venture beat. Retrieved June 21, 2015.

[4] "Duolingo – Learn Languages for Free". Windows phone. Microsoft. Archived from the original on July 2, 2015. Retrieved November 21, 2014.

[:32-5] Matt (February 20, 2023). "The Complete List Of EVERY Duolingo Language". Duoplanet. Archived from the original on September 21, 2022. Retrieved March 4, 2025.

[fc-5sep2024-6] Budds, Diana (September 5, 2024). "Inside Duolingo's stunning new NYC office, where employees get to choose where and how they work". Fast Company. Retrieved September 5, 2024.

[7] Perez, Sarah (July 9, 2024). "Duolingo acquires Detroit-based design studio Hobbes". TechCrunch. Retrieved July 22, 2024.

[8] "Duolingo Careers". careers.duolingo.com. Retrieved November 3, 2024.

[9] SeanColombo (September 27, 2024). "I'm not sure, we don…". r/duolingo. Retrieved September 28, 2024.

[10] Patel, Nilay (October 14, 2024). "Duolingo CEO Luis von Ahn thinks AI has a lot to teach us". The Verge. Retrieved November 2, 2024.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]