A comparison of ROI between homegrown and pre-built solutions for high-growth startups reveals a staggering difference. The total cost of ownership, revenue impact, and ROI are analyzed over a three-year timeline. Infrastructure development, feature expansion, maintenance, and onboarding costs are calculated for both build and buy scenarios. The results show that the ROI for a homegrown solution is 9%, while it's 1,954% for a pre-built one (WorkOS). This indicates that using WorkOS can lead to faster time to market, immediate scalability, and proven reliability, allowing organizations to focus on their core products.