People unlock their language skills when they start engaging with content they genuinely love — every single day. With AI-powered learning built on top of YouTube and Netflix, we get people excited to spend 10 minutes a day learning English through the videos they're already watching.
H I S T O R Y
Aug. 2025
LangFlix ranked #2 on the Education chart in the South Korea App Store.
Jan. 2024
Theta One signs a joint R&D deal with YBM, towards building Korea's best AI Speech Recognition technology for Koreans' English speech across all generations & proficiency.
Jan. 2024
Metabuddy reaches 1.8K MAU / 10K Daily Messages
Dec. 2023
YBM Phone & Video Tutoring launches Metabuddy as its AI practice tool as a preview/review system to its learning material
Dec. 2023
DYB Choisun x Theta One MOU for jointly developing "Generative AI for English Classrooms" programs
Dec. 2023
YBM x Theta One MOU for jointly developing Generative AI-based English learning services
Oct. 2023
Metabuddy is released as an AI practice tool to Day1Company's English book brands, WannaSpeak and ShinyEnglish
Jun. 2023
Pre-Seed from TheVentures, Co. Ltd.
Feb. 2023
Theta One Korea, Inc. Incorporated
Nov. 2022
Angel Investments from John Wu (First CTO of Alibaba), Erik Sebesta (Co-founder of Cloud Technology Partners),
Aug. 2022
#1 Place in Orange Planet's Startup Acceleration Program
Jan. 2022
Co-founders meet while serving in the Republic of Korea Air Force