1. Integration Capabilities: Hubot is a versatile chatbot that can integrate with various services and tools, allowing for a wide range of functions. On the other hand, HubCommander is more specialized in managing GitHub organizations and repositories, providing specific features tailored to these tasks. Pagerbot focuses specifically on incident response and alerting, offering features that cater to this specific use case.

2. Customization Options: Hubot provides a high level of customization through the use of scripts, allowing users to extend its functionality as needed. In contrast, HubCommander and Pagerbot offer a more streamlined approach with predefined features focused on their respective functions, providing less flexibility in customization options.

3. Cost Structure: Hubot is open-source and free to use, providing a cost-effective solution for integrating a chatbot into workflows. HubCommander and Pagerbot may have subscription-based models or additional costs for specific features or support, potentially adding to the overall cost of implementation and maintenance.

4. User Interface: HubCommander and Pagerbot typically have user interfaces that are tailored to their specific use cases, providing a more intuitive experience for managing GitHub organizations or responding to incidents. Hubot, on the other hand, may require more technical expertise to set up and customize due to its more generic nature.

5. Community Support: Hubot, being a widely-used chatbot platform, has a large and active community that contributes to its development and provides support through forums and documentation. HubCommander and Pagerbot may have smaller communities or specialized support channels, potentially leading to slower responses to issues or fewer resources for troubleshooting.

6. Focus and Use Cases: While Hubot is a general-purpose chatbot that can be adapted to various tasks and workflows, HubCommander and Pagerbot have more specific use cases in managing GitHub repositories and incident response, respectively. This focus can make them more efficient and effective in their respective domains, at the expense of versatility compared to Hubot.

In Summary, the key differences between HubCommander, Hubot, and Pagerbot lie in their integration capabilities, customization options, cost structures, user interfaces, community support, and focus on specific use cases.