Gravity has a way of exposing truth without saying a word. You don’t notice it at first, then suddenly you realize everything has been pulling you in the same direction the whole time. That feels like the right place to start with GravityLabs. Founded in July 2022 by Woonyeon Kim, also known as Jacob Kim, this company did not come out of Seoul chasing noise or attention. It showed up with mass. Quiet confidence. The kind that bends behavior instead of begging for it.
MoneyWalk is where that gravity shows up in motion. An AI-powered healthcare platform that turns walking, sleep, nutrition, mental health, body composition, and blood pressure into something people actually stick with. Not out of guilt. Not out of fear. Out of incentive and understanding. This is behavior change tech, not step-counter theater. Built by a founder who took leave from Yonsei University College of Medicine, after already shipping one digital therapeutics company, because survival rates were not enough. Healthspan was the real metric.
The data reads like a controlled burn. About 1.3M monthly active users. 5M cumulative users across 111 countries. Roughly 40% of MAU coming from outside Korea with minimal localized marketing. Ranked 8 in Japan’s healthcare app category. ARR approaching $25M with a 20-person team. 10x growth over two years and a revenue trajectory pushing 20x annually. That is not growth hacking. That is product gravity doing its job.
December 2025 marked the second close of GravityLabs’ Series A, bringing the round to $17M and total funding to $25M. Goodwater Capital and SBVA led this close, joining Atinum Investment, DSC Investment, Valon Capital, and returning believers Bass Ventures, Schmidt, Seoul Techno Holdings, HGI, Tail Ventures, and NAVER D2SF. Bass Ventures backing the company across seed, pre-Series A, and Series A is not loyalty. It is conviction reinforced by execution.
The real tension sits in what comes next. A San Francisco footprint. North American product builds. Insurance partnerships. B2B integrations. A shift from walk-to-earn into a full health-to-earn ecosystem. MoneyWalk already integrates with South Korea’s National Health Insurance Service database, blending consumer engagement with institutional credibility. AI personalization. Health camera biometrics. Rewards that actually reinforce intrinsic motivation instead of burning it out.
Woonyeon Kim says the next healthcare leader will emerge where customer experience meets AI. GravityLabs is not trying to fight gravity or escape it. They are shaping it, using data, discipline, and incentives to pull millions of people toward better habits without ever raising their voice. That is how real systems change.
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