When comparing UseResponse vs Zammad, the Slant community recommends Zammad for most people. In the question“What are the best service desk software / ticket system for a small business?” Zammad is ranked 3rd while UseResponse is ranked 8th. The most important reason people chose Zammad is:
[GitHub and Gitlab integrations](https://admin-docs.zammad.org/en/latest/system/integrations.html#integrations-for-issue-trackers).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Multi-language support
Currently supports 10 languages, translation tool available.
Pro Self-hosted option available
It includes unlimited number of users, agents, topics, support of SSL encryption, polls, announcements, and 1 year of support & upgrade. There are also commercial add-ons that can be purchased separately.
Pro Full UI Customization
Easy to configure the interface and the flows
Pro GitHub and Gitlab integrations
Pro Free and open source
The app is built with Rails and is freely available to download and install on any server that supports Ruby web applications.
Cons
Con No free version
Con No extensions (yet)
The app is fully featured but as it's a relatively new player, there isn't a plugin/extension system as of yet.