PRODUCT
RTZR STT
COMPANY
We bring practical AI to the world
We bring practical AI to the worldReturnZero is a pragmatic AI startup

We bring the latest AI technology from the lab to the real world, shaping the future transformed by AI.

Founded In

2018

Total Voice Data Processed

15 million hours+
(approximately 1,712 years)

Total User Count

1 million+

Total Investment Received

$14m
(Series B)

Team

Arc (Chamsol Lee)

CEO
Bachelor of Computer Science, KAIST
Kakao AD Business Unit
Founder / CEO of Lotiple (Acquired by Kakao)

Homura (Juyoung Jung)

CEO & CTO
KAIST Computer Science
Kakao KakaoTalk PC Team, Messaging Team
Lotiple CTO / Co-founder
ACM-ICPC World Finals 17th Place

Rene (Hyunjong Lee)

CPO
Bachelor of Computer Science, Master of Electronics, KAIST
Worked in Kakao's KakaoTalk and Kakao Taxi teams
CPO and Co-founder of Lotiple
Worked in LG Electronics' New Business Development team

Kay (Hyosin Kim)

COO
Bachelor of IT Management, KAIST
Certified Public Accountant (KICPA)
Continental AG APAC Compliance
CFO at Bank Salad

JK (Jeongkyu Roh)

Head of Research
Bachelor and Master of Computer Science, KAIST
IDeCka CTO Research/Development Lead
GoYoung Technology Solution Lead
Sommers, Moses Research/Development

Arthur (Dongwoo Kim)

Head of ML Engineering
Bachelor of Computer Science, Master of ML, KAIST
ReturnZero (Speech-to-text, Speaker Diarization, MLOps)
KakaoBrain (NLP, Vision)
Kakao (iOS, SDK, Data Science)

Dan (Joonwon Lee)

Lead ML Engineer
Bachelor and Master of Industrial Engineering, Seoul National University
SK Telecom Machine Learning Engineer (AD-Tech, RecS)
Kakao Data Scientist (AD-Tech)

Link (Hangil Kim)

Researcher
Bachelor of Computer Science, KAIST
Master of Education, Seoul National University
National Lifelong Learning Promotion Institute K-MOOC Operation Center

David (Hojun Yu)

Researcher
MangoPlate Research and Development
Jitell Global Chief Researcher
Kyung Hee Sports Fanatic CTO
Escore Special Research Officer

Pierce (Sanghong Ahn)

ML Engineer
Ph.D. in Electrical and Computer Engineering, KAIST
Senior Researcher in the Cloud Network Systems division at Samsung Electronics Network Business

Sean (Changho Park)

Lead Product Designer
Senior Designer at Kakao (Early Member)
Design Lead for Kakao Gifts
Head of Design Team at 11th Avenue in Malaysia
Master of Visual Design, Sungkyunkwan University

Michael (Seungho Choi)

Head of Business
Atlas Labs (Head of Business, secured a voice recognition contract worth 2.5 billion KRW)
Haden Korea (Co-founder)
Bachelor of Materials Science and Engineering, Sejong University

Investors

Kakao Ventures
Company K Partners
Atinum
Bass Investment
Woori Venture Partners
Hana Ventures

News

Stay updated with
ReturnZero's important news

2024.11.20 07:00:00

쑥쑥 크는 음성인식 시장, 존재감 과시하는 韓 기업들

2024.11.20 07:00:00

[테크월드뉴스=양승갑 기자] 인공지능(AI) 시장 확대와 함께 일부 기업들이 음성인식을 경쟁력으로 내세웠다. 이들 기업은 고도화된 기술력, 고품질 언어 데이터, 다국어 번역 등을 통해 점차 존재감을 높여가는 분위기다.

2024.10.24 00:47:55

‘일잘러’ 되기 위한 슬기로운 AI생활 - 매일경제

2024.10.24 00:47:55

AI 서비스가 물밀듯이 몰려오는 시대에 살고 있다. 생산성 향상을 무기로 다양한 AI서비스가 경쟁하고 있는 이때, 잘 활용하는 비즈니스맨들은 ‘일잘러’의 타이틀과 함께 보다 많은 물리적 자유까지 챙길 수 있는 것이 현실이다.

2024.09.17 10:42:25

리턴제로 “sLM 개발로 음성 인식 넘어 기업 생산성 도구로 스케일업”

2024.09.17 10:42:25

"회의록 정리 STT(음성 텍스트 변환) 서비스를 넘어, 기업 생산성 도구로 '콜라보'를 업그레이드 중입니다. 이를 위해 자체 소형언어모델(sLM)을 개발했습니다. 모델 성능도 최상급으로 결과가 나왔습니다."리턴제로(대표 이참솔)는 회의록 작성 인공지능(AI) 서비스 '콜라보'와 통화 녹음을 문자로 변환하는 앱 '비토' 등으로 잘 알려진 음성인식 AI 기업이다.그동안 축적한 한국어 데이터를 기반으로 목소리를 분석해 화자를 분리하는 엔진과 통화 음성을 실시간 텍스트 변환하는 엔진 등을 통해 정확한 음성인식 기술을 선보였다.

Blog

Learn more about our technology and culture in our blog!

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