For quick brainstorming and sketching ideas in a low-fidelity format, Excalidraw is the better choice. It's free, open-source, and perfect for developers sketching architecture or facilitating light discussions. However, if you need polished visuals or a comprehensive design tool, Excalidraw falls short.
On the other hand, if your focus is on transforming a codebase into a structured knowledge graph for deeper insights, choose Graphify. It’s ideal for developers managing large codebases and can operate entirely on-device, ensuring data privacy. Keep in mind, though, if you want a user-friendly GUI or require extensive integrations with other tools, Graphify might not meet your needs.