1. Workflow Automation: Smartling offers advanced workflow automation capabilities, allowing users to create custom workflows, automate content translation processes, and integrate seamlessly with existing systems. Weblate, on the other hand, provides basic workflow management features but lacks the robust automation options of Smartling.

2. Cost Structure: Smartling usually operates on a subscription-based model with pricing based on the number of words translated. In contrast, Weblate is an open-source platform, making it a cost-effective option for organizations looking to manage their translation projects internally without incurring additional expenses for licensing or subscriptions.

3. User Interface: Smartling boasts a user-friendly and intuitive interface that streamlines the translation and localization process, making it easy for users to manage and track their projects efficiently. Weblate also provides a user-friendly interface but may not offer the same level of customization and ease of use as Smartling for complex translation projects.

4. Integration Capabilities: Smartling offers extensive integration options with popular Content Management Systems (CMS), third-party tools, and APIs, enabling seamless connectivity with various platforms for efficient translation management. Weblate, while providing some integration capabilities, may not offer the same breadth of integrations as Smartling, limiting connectivity with other systems.

5. Quality Control Features: Smartling includes advanced quality control features such as translation memory, glossary management, and linguistic validation tools to ensure accurate and consistent translations. Weblate, while offering basic quality control functionalities, may not provide the same level of comprehensive tools for maintaining translation quality throughout the localization process.

6. Support Services: Smartling offers dedicated customer support, training resources, and regular updates to assist users in optimizing their translation workflows and addressing any technical issues promptly. Weblate, being an open-source platform, may rely more on community support and documentation, potentially offering limited direct assistance for users in need of guidance or troubleshooting.

In Summary, Smartling and Weblate differ in workflow automation, cost structure, user interface, integration capabilities, quality control features, and support services.