Plang
1 known investors
Plang is an AI-powered English conversation app for Korean learners that has users speak or type sentences, then analyzes them in real time to give personalized feedback on phrasing, pronunciation, and expression. It offers a customized curriculum, native-content video library, spaced-repetition review, and pronunciation training to help learners think and speak in English.
Also known as (주)í”Œëž Â· Plang: AI English Speaking · 플ëž
Investors · 1
Company profile
researched Aug 2026Plang is an English-speaking learning application built around the premise that fluency comes from practicing to think and speak directly in English rather than translating from a first language. Users produce English sentences by voice or keyboard, and the app's AI analyzes each sentence in real time, returning personalized feedback that identifies what worked, suggests more natural phrasing (for example, recommending "figure out" in place of a learner's original wording), and explains nuance differences between alternative expressions.
The product combines several components: free-form conversation practice with native-speaker scenarios covering situations such as travel abroad, business meetings and casual conversation with friends; an AI-designed personalized curriculum that assesses a learner's usable sentence length, difficult words, unnatural expressions and pronunciation and then proposes a learning path; shadowing practice against a library of more than 200,000 pieces of local video content including dramas, movies, vlogs and animations; an automated spaced review system that resurfaces studied sentences based on a tracked sentence-acquisition rate until they are retained; and real-time pronunciation analysis and correction at the phoneme level. The Google Play description positions the service at intermediate and advanced learners who can understand English material but struggle to express themselves in it.
Business model
Plang distributes a consumer mobile application through the Apple App Store and Google Play. The Google Play listing states the app contains in-app purchases, and the company's site promotes a free trial as the entry point to the service.
The app is offered with in-app purchases according to its Google Play listing, following a free trial promoted on the company's website.
Traction
The app has been installed more than 100,000 times on Google Play and holds a 4.7 rating on both stores, based on 1,106 App Store ratings and 2,590 Google Play ratings as reported on the company's website.
▸Full profile — market position, technology, go-to-market, geography
Market position
Plang competes in the AI language-learning app category; its Google Play listing appears alongside comparable apps including Tutor Lily, Langotalk, Innovative Language Learning, Learn English with Readle, BoldVoice and Santa - AI TOEFL.
Plang's stated approach centers on training learners to compose their own English sentences and then correcting them with real-time AI analysis, rather than presenting only preset drills. It pairs this with a proprietary learning method developed in-house, a large library of authentic native video used for shadowing, an AI-set target sentence length calibrated to the individual learner, and pronunciation training measured by accuracy on specific phonemes.
Technology
The app applies AI to analyze user-generated English sentences in real time, diagnosing sentence structure, unnatural expressions and word choice; it also profiles learner ability to set an appropriate sentence length, analyzes and corrects pronunciation in real time, and drives an automated review scheduler based on a per-sentence acquisition rate.
Go-to-market
The company markets directly to consumers through its website and app store listings, offering a free trial and featuring user testimonials from learners in occupations such as marketing, English teaching and dentistry. Support is handled by email and by in-app chat.
Intermediate and advanced English learners, primarily Korean speakers, who can comprehend English but have difficulty expressing themselves in speech; the app is rated for teen and older users.
Geography
The developer, (주)플ëž, is listed at an address in Bangbae-dong, Seocho-gu, Seoul, South Korea. The company operates a Korean-language site and a separate English-language site at plang.ai/us, and the app is distributed on Google Play in the United States storefront.
Compiled by commissioned research from 4 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
▸Research sources · 4
primary sources listed
- Plangplang.ai · web
4 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Plang do?
- Plang is a Korean AI English-speaking app that analyzes learners' spoken or typed sentences and returns personalized feedback.
- Who are Plang's investors?
- Plang's investors include Kakao Ventures.