Switching to a new real-time video API can be daunting for developers who already have an established user base and cannot afford downtime. Many are wary of the effort involved in migrating from existing providers like Vonage OpenTok, which may not offer features such as Daily's Global Mesh Network, automatic switching between peer-to-peer and server-routed video calls, or low-level control over encoding and networking parameters. However, Daily provides guides, demos, and videos to help developers transition smoothly, including two video walkthroughs on transitioning from OpenTok to Daily, a guide on using shim libraries as drop-in replacements for OpenTok, and an in-depth technical guide covering step-by-step code migration, real-life examples of changes made during migrations, and lessons learned.