1. Integration with other tools: One key difference between Dynamic Signal and Yammer is their integration capabilities with other tools. Dynamic Signal is known for its seamless integration with existing HR systems, making it easier for HR departments to streamline communications and employee engagement efforts. On the other hand, Yammer focuses more on integration with Microsoft products like Office 365, promoting collaboration within organizations that already use Microsoft tools.

2. Focus on Employee Advocacy: Dynamic Signal puts a strong emphasis on employee advocacy, providing tools and features that empower employees to become brand advocates and share company content on social media. In contrast, Yammer places more focus on internal communication and collaboration within the organization, offering a platform for employees to share ideas, collaborate on projects, and communicate in real-time.

3. Target Audience: Another significant difference between Dynamic Signal and Yammer lies in their target audience. Dynamic Signal primarily targets larger enterprises and organizations looking to enhance their employee communication strategies on a large scale. Yammer, on the other hand, caters to a broader range of companies, including small and medium-sized businesses, focusing on fostering collaboration and knowledge-sharing among employees.

4. Content Sharing Capabilities: Dynamic Signal offers robust content sharing capabilities, allowing organizations to create and distribute targeted content to specific employee segments, measure the impact of their communication efforts, and drive employee engagement. In comparison, Yammer provides a platform for sharing a wide range of content types, including documents, images, and videos, to facilitate knowledge exchange and collaboration among team members.

5. User Interface and User Experience: The user interface and user experience differ between Dynamic Signal and Yammer. Dynamic Signal is designed with a user-friendly interface that prioritizes simplicity and ease of use, making it accessible for employees at all levels of the organization. Yammer, while also offering a user-friendly interface, may be more tailored towards organizations already using Microsoft products, which could impact the overall user experience for those unfamiliar with that ecosystem.

6. Cost and Pricing Structure: In terms of cost and pricing structure, Dynamic Signal often operates on a subscription-based model, with pricing tiers based on the size of the organization and the features required. Yammer, on the other hand, may be bundled within Microsoft's Office 365 suite or offered as a standalone product with different pricing options based on the number of users and desired functionalities.

In Summary, Dynamic Signal and Yammer differ in their integration capabilities, focus on employee advocacy, target audience, content sharing capabilities, user interface and user experience, and cost and pricing structure.