Download the MWC App

Close

Hailey Yoon

CEO & Founder, BlueSignum

Speaker Bio

Jeonghyun (Hailey) Yoon is the CEO and Founder of BlueSignum, a mental health tech startup with a vision to be the first choice for people seeking support during difficult times.


BlueSignum’s flagship product, DailyBean, is the No.1 mood-tracking app in the U.S., Canada, and the U.K., with over 10 million downloads worldwide. Now available in 150+ countries, DailyBean generates 90% of its revenue from the global market, reflecting its widespread impact.


To further its mission, BlueSignum recently launched Lime AI, an AI-powered stress management and therapeutic support platform. Using voice-based interactions, Lime AI delivers personalized care, integrating the latest research in cognitive-behavioral therapy and emotional regulation. By providing professional-grade stress management tools, Lime AI makes evidence-based mental health care more accessible than ever—marking a significant step in redefining mental health accessibility through AI.


Since its founding in 2020, BlueSignum has raised $2 million in funding, including government grants, to scale its services and accelerate global expansion. Recognized for its innovation and impact, the company was selected for Google for Startups Korea and has been featured in Google Play’s Best Apps of the Year for three consecutive years, solidifying its position as a leader in digital mental health solutions.