When comparing Viima vs PHPBack, the Slant community recommends PHPBack for most people. In the question“What are the best user support & feedback services?” PHPBack is ranked 10th while Viima is ranked 18th. The most important reason people chose PHPBack is:
It has been already translated to Spanish and they are adding support for more languages.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Engaging UI
The UI is fun and engaging, using bubbles to display suggestions and with a layout that makes viewing activity/comments easy.
Pro Multi-language support
It has been already translated to Spanish and they are adding support for more languages.
Pro Easy setup
PHPBack is very easy to setup, all you need is a server with PHP5 and MySQL installed.
Pro Open Source
PHPBack is open source, uses GPLv3 license.
Cons
Con Limited support features
Viima does not offer many ticketing and customer support features.
Instead, it only supplies a way for users to add suggestions and other users to provide their feedback on them. This may be too limiting for companies looking for a full user support service.
Con Small community
PHPBack is fairly young (first stable version was releases in July 2015). Currently the community is small, which may make it more difficult to find help/support.
However, the developer is active on the github page and generally responds quickly.