Sanity, a company specializing in composable content, has leveraged Vercel to improve the efficiency of their developer team and enhance user experience. By utilizing Vercel's Edge Middleware for stress-free experimentation, Sanity can run A/B tests without disrupting the client experience. The company also credits Vercel's ease of integration with tools like Checkly for end-to-end testing, which has saved them several times. With a seamless transition from Google Cloud Platform to Vercel, Sanity's developers can now focus on building unique features rather than managing operational overhead. This partnership has improved both the developer experience and user experience, allowing users to get the most out of Sanity while their developers continue to experiment and innovate.