1. Scalability: One key difference between Backendless and Firebase is their scalability. Backendless offers automatic scaling of applications, meaning that as the app usage increases, the backend infrastructure automatically adjusts to handle the load. It can handle high traffic and large data sets without requiring manual intervention. On the other hand, Firebase also supports automatic scaling, but it has some limitations when it comes to handling large data sets or high traffic applications. It may require additional configuration or manual intervention to handle scalability issues.

2. Backend Development: Another difference between Backendless and Firebase is the level of control in backend development. Backendless allows developers to write server-side code in various programming languages, giving them more flexibility and control over the backend logic. It also provides features like custom business logic, API services, and event-driven serverless functions. In contrast, Firebase mainly focuses on serverless architecture, where developers write client-side code and use Firebase's pre-built services for backend functionality. It provides limited options for server-side customization and requires reliance on Firebase's backend services for most functionalities.

3. Real-time Database: Firebase offers a real-time database as one of its core features. The real-time database allows developers to sync data in real-time across multiple clients and devices without writing complex server-side logic. It uses WebSockets to achieve real-time synchronization, providing instant updates and immediate responses to changes in data. In comparison, Backendless does not have a built-in real-time database feature. However, it supports real-time data integration through external APIs or services, which can be integrated into the app's backend logic.

4. Data Storage: Backendless and Firebase have different approaches to data storage. Backendless provides a unified data storage solution that seamlessly handles structured data, unstructured data, and files. It includes features like data import/export, search capabilities, and fine-grained data permissions. Firebase, on the other hand, offers a NoSQL cloud database for storing and syncing structured data. It provides automatic offline synchronization and supports security rules for data access control. However, Firebase does not have native support for file storage and requires integration with other services for file storage functionality.

5. Authentication and User Management: Backendless and Firebase have different approaches to authentication and user management. Backendless provides a comprehensive authentication system that supports multiple authentication methods like email/password, OAuth, and custom authentication providers. It includes features like user registration, login, password recovery, and roles/permissions management. Firebase also offers authentication services, but it primarily focuses on providing seamless authentication using popular social login providers like Google, Facebook, or Twitter. Firebase simplifies the authentication process but may have fewer customization options compared to Backendless.

6. Analytics and Reporting: Firebase provides robust analytics and reporting capabilities as part of its platform. It allows developers to track user behavior, app usage, and conversion events. Firebase analytics provides real-time insights, user segmentation, and funnel analysis for understanding app performance. Backendless also offers analytics and reporting features, but it may have fewer advanced capabilities compared to Firebase. Backendless focuses more on providing backend services and developer tools rather than extensive analytics and reporting functionalities.

In Summary, Backendless offers automatic scalability, flexible backend development options, and a unified data storage solution, while Firebase focuses on serverless architecture, provides a real-time database, and specializes in authentication and user management. Backendless provides more control and customization options, while Firebase simplifies development with pre-built services and seamless authentication.