Teuida
| Developer(s) | TEUIDA Corp. |
|---|---|
| Initial release | June 2020 |
| Engine | |
| Operating system | iOS, Android |
| Website | www |
Search Teuida on Amazon.
Teuida (Hangul: 트이다, lit. to open up or "to become fluent") is a language learning mobile application developed by TEUIDA Corp. (주식회사 트이다), headquartered in Gangnam-gu, Seoul. The application employs first-person video simulations in conjunction with AI-powered speech recognition to facilitate speaking practice in Korean, Japanese, Spanish, and French.[1][2]
The company was established in 2019 by Jang Ji Woong, a University of California, Berkeley graduate, and released its first product in June 2020 as a Korean-language speaking service for non-native speakers.[1][2] Rather than employing text-based drills or gamification, the application places emphasis on spoken output through simulated conversations with native speakers, with an AI engine providing real-time pronunciation feedback.[3] The primary user base consists largely of Hallyu (Korean Wave) enthusiasts in North America and Europe.[2]
As of October 2025, the application has been downloaded over five million times.[4] In November 2025, the company raised ₩2 billion (approximately US$1.5 million) in a Series A funding round led by JB Investment. Jeong Hee-cheol, a senior examiner at JB Investment, stated that "Teuida demonstrated its potential for sustainable growth by achieving a doubling of revenue and maintaining profitability in 2024."[5]
History
Founding
TEUIDA Corp. was established in Seoul, South Korea, by Jang Ji Woong (장지웅), a graduate of the University of California, Berkeley, where he studied political science.[1] The company was incorporated on February 13, 2019.[1] Jang has stated that his experience studying abroad motivated him to develop a platform enabling users to improve their foreign language speaking skills without the physical and economic constraints of living overseas.[2] The name "teuida" (트이다) derives from a Korean verb meaning "to open up" or "to become fluent."[3]
The application was launched in June 2020 as a Korean-language speaking practice service for non-native speakers.[2]
Growth and milestones
The application reached one million downloads within its first year of operation, by June 2021.[6] By August 2022, it had surpassed two million downloads, with users having completed approximately 216 million speaking practice sessions.[2] As of January 2025, the company reported four million cumulative downloads and approximately 370,000 monthly active users.[5] The application surpassed five million downloads in October 2025.[4]
In September 2022, the company presented its product at the Korea–US Startup Summit held at Pier 17 in New York City, demonstrating its interactive simulation-based learning methodology.[2]
Funding
TEUIDA received early-stage investments from Lotte Ventures and Blue Point Partners for initial technology development.[5]
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Pre-Series A | July 2021 | ₩700 million (~US$600,000) | Big Basin Capital, Seoul Industry Promotion Agency | [6] |
| TIPS Program | September 2021 | ~₩500 million (govt R&D grant, 2 years) | Korean government (recommended by Big Basin Capital) | [7] |
| Series A | March 2025 | ₩2 billion (~US$1.5 million) | JB Investment | [5] |
According to multiple South Korean financial outlets, the company's annual revenue more than doubled year-over-year in 2024, and the company achieved profitability for two consecutive years.[5][4]
Product
Learning methodology
Teuida's core pedagogy centres on what the company terms "interactive simulations"—first-person video sequences in which the user assumes the role of one participant in a Korean-language conversation.[2][4] During each lesson, the user watches a short video featuring a native Korean speaker, then responds verbally to prompts within the conversation. The application's speech recognition engine analyses the user's pronunciation and provides a real-time accuracy score along with corrective feedback.[1][3]
In an interview with AVING News at the 2022 Korea–US Startup Summit, CEO Jang Ji Woong described the methodology as designed to replicate the experience of "talking with native speakers" without the need for a physical language exchange partner.[2] According to Study International, the approach prioritises spoken output and listening comprehension from the outset, rather than vocabulary memorisation or grammar drills.[1]
Content and courses
Lessons are structured around everyday conversational scenarios, including ordering food at a restaurant, shopping, requesting directions, navigating public transport, and conducting workplace interactions.[2][4] The application also incorporates content drawn from Korean popular culture, including scenarios inspired by Korean television dramas (K-dramas), which the company positions as a means of teaching colloquial expressions and cultural context simultaneously.[3]
The application features bilingual Korean-American tutors, referred to as "Teuitors," who appear in lesson videos and provide contextual cultural guidance—such as appropriate levels of formality and honorific usage—alongside language instruction.[3] In July 2020, Momoland member Nancy McDonie was appointed as a brand ambassador and appeared in dedicated in-app lesson content.[8]
AI and speech recognition
The application integrates an AI-powered pronunciation evaluation engine that assesses the user's spoken Korean (or other target language) against native speaker reference data. Upon completing each spoken prompt, the user receives a numerical pronunciation score and visual indicators highlighting areas requiring improvement.[1][3] This feedback mechanism is intended to allow self-directed practice without the need for a human tutor for pronunciation correction.[2]
Languages
Teuida initially launched with Korean language courses in June 2020.[2] The company subsequently expanded its offering to include Japanese, Spanish, and French with the stated objective of establishing a multilingual conversation practice platform.[5][9] As of 2022, the application was available in English, Portuguese, and Japanese interface languages for learners.[3]
User demographics
As of September 2022, the company reported that approximately 92 percent of its subscribers were women in their twenties and thirties, with over 70 percent of users residing in North America and Europe. The application's primary target demographic comprises members of Hallyu (Korean Wave) fan communities with an interest in learning Korean.[2]
Business model
Teuida operates on a freemium model offering limited free daily usage alongside a premium subscription tier.[5] The company has also pursued business-to-business (B2B) opportunities, securing advertisement contracts with the Gyeongsangbuk-do Provincial Tourism Office and Korean cosmetics companies.[2] In 2025, TEUIDA announced plans to develop a B2B solution for educational institutions, with a particular focus on Southeast Asian markets, where demand for Korean language instruction has been increasing.[5]
Reception
App store ratings and awards
As of 2025, the application maintains a rating of 4.9 out of 5 on the Apple App Store, based on over 48,000 user reviews, and a rating of 4.6 out of 5 on Google Play.[10] According to South Korean financial daily E-Daily, the application is ranked first among Korean language education apps and eighth among Japanese language education apps on major app stores.[4]
In September 2022, the application received a prize at the 7th e-Learning EdTech Business Model Contest held in South Korea.[2]
Image and brand
Hallyu association
Teuida has actively positioned itself within the Hallyu (Korean Wave) cultural ecosystem. In July 2020, the company appointed Nancy McDonie of the South Korean girl group Momoland as a brand ambassador, with McDonie appearing in dedicated in-app lesson content made available to users in the Philippines, the United States, Canada, and other English-speaking countries.[8] As of September 2022, the company reported that approximately 92 percent of its subscribers were women in their twenties and thirties, with over 70 percent of users residing in North America and Europe—demographics closely aligned with the global K-pop fan community.[2]
The application also incorporates content drawn from Korean television dramas (K-dramas), which the company positions as a means of teaching colloquial expressions and cultural context simultaneously.[3]
Company
TEUIDA Corp. is headquartered at 165 Yeoksam-ro, 5th floor, Gangnam-gu, Seoul, South Korea.[5] The company was selected for the third cohort of Google Korea's Changgu (창구) startup support program in September 2024.[11] The company holds seven registered patents.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Nicole Chin (2025-05-26). "Korean language learning app Teuida". Study International. Retrieved 2026-03-23.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 Joseph Choe (2022-09-30). "Teuida Reveals Korean Language Speaking Service at Korea-US Startup Summit". AVING News. Retrieved 2026-03-23.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "Teuida Can Make You Talk in Korean Easily Through Its First-Person Virtual Conversations". KoreaTechDesk. 2022-02-10. Retrieved 2026-03-23.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Song Jae-min (2025-03-24). "에듀테크 '트이다', 시리즈A 투자 유치…매출 전년 대비 2배↑" (in 한국어). E-Daily. Retrieved 2026-03-23.
- ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 Choi Mi-ri (2025-04-02). "한국어 교육 앱 '트이다', 20억 원 시리즈A 투자 유치" (in 한국어). InvestNews. Retrieved 2026-03-23.
- ↑ 6.0 6.1 "한국어 회화연습 앱 '트이다', 7억 투자유치" (in 한국어). VentureSquare. 2021-07-24. Retrieved 2026-03-23.
- ↑ Kim Jin-ah (2021-10-26). "한국어 회화 교육 스타트업 '트이다', 팁스 선정" (in 한국어). VentureSquare. Retrieved 2026-03-23.
- ↑ 8.0 8.1 Christine Fernandez (2020-07-17). "MOMOLAND's Nancy Can Now Be Your Own Personal Korean Tutor". Koreaboo. Retrieved 2026-03-23.
- ↑ Choi Tae-beom (2025-03-24). "가상 연인과 외국어 공부…트이다, 시리즈A 투자유치" (in 한국어). Money Today. Retrieved 2026-03-23.
- ↑ "Teuida, a Korean EdTech Startup, Secures Series A Funding from JB Investment". WOWTALE. 2025-03-24. Retrieved 2026-03-23.
- ↑ "창구 Inside: 트이다". Google Korea Blog. 2024-09. Retrieved 2026-03-23. Check date values in:
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External links
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