Beyond Menu is a popular food delivery service in the US that connects restaurants and diners. Their Next.js app is deployed on Vercel and serves millions of hungry visitors every month. To scale their development, they decided to adopt feature flags for gradual rollouts, instant rollbacks, A/B testing, trunk-based development and easier collaboration both internally and with beta users. They knew they needed to evaluate feature flags and A/B tests on both the server and the client.

And since they used the App Router, the solution needed to work with React Server Components, Client Components and different rendering modes like static, dynamic and partial prerendering. At Beyond Menu, every millisecond impacts conversion, so they turned to Vercel's Edge Config and Hypertune for seamless feature flag management without layout shifts. Read more