1. Collaboration Features: Gitpod offers robust collaboration features that allow multiple users to work on the same project simultaneously. It supports real-time collaboration with features like shared terminals, code reviews, and in-editor comments. On the other hand, StackBlitz does not have extensive collaboration features, making it more suitable for individual development or smaller teams.

2. Integrated Development Environment (IDE) Features: Gitpod is built on Visual Studio Code (VS Code) and provides a full-fledged IDE experience with a wide range of features such as syntax highlighting, code completion, debugging, and integrated terminals. StackBlitz, on the other hand, has a web-based IDE with limited functionality compared to Gitpod's VS Code-based IDE.

3. Workspaces Persistence: Gitpod allows users to save their workspaces, providing the ability to resume their work from exactly where they left off. This feature is beneficial for developers who want to maintain their coding environment across multiple sessions. StackBlitz, on the other hand, does not have persistent workspaces, and users have to start from scratch each time they access it.

4. Browser Compatibility: Gitpod is compatible with a wide range of popular browsers, including Chrome, Firefox, Safari, and Microsoft Edge. StackBlitz, on the other hand, has limited browser compatibility and may not work optimally on all browsers.

5. Scalability and Performance: Gitpod is built to be highly scalable and can handle larger projects with ease. It provides efficient resource utilization and performs well even with complex applications. StackBlitz, while capable of handling small to medium-sized projects, may face performance limitations with more extensive or resource-intensive applications.

6. Pricing and Licensing: Gitpod offers both free and paid plans, catering to individual developers, teams, and enterprise customers. It provides flexible pricing options based on usage and team size. StackBlitz, on the other hand, primarily focuses on providing a free and open-source platform, with limited premium features and licensing options available.

In Summary, Gitpod provides extensive collaboration features, a full-fledged IDE built on VS Code, persistent workspaces, broad browser compatibility, scalability, and flexible pricing options. StackBlitz, on the other hand, has a limited collaboration capability, a web-based IDE, no workspace persistence, limited browser compatibility, potential performance constraints, and a focus on free and open-source usage.