Cannot create tickets or get notifications with Slack, for instance, because API is only available with a paid plan. Other competitors have API available even with free plan.
Compared to other services on the market, Uservoice's main differentiator is the simplicity of the feedback and support mechanisms. The widget that is installed on your website only has two options for the users:
Contact Support
Submit feedback
Users can also quickly see existing support enquiries and product ideas from the submission screen to reduce duplicated requests.
The Disqus design is minimalist and is broken down into three tabs - discussion, community and My Disqus.
The discussion interface provides the usual elements, but with unique features like visual indicators of live actions, such as new replies and even when another user is typing. It's possible to sort discussion by new, old and best.
The community tab is designed to help connect commenters together to form a network that keeps them coming back. It is also a great source of traffic from external sites.
My Disqus helps users quickly keep track of activities in their network as well as manage notifications.
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.
Help Scout is constantly being improved with features being updated and new features added on a regular basis.
The developers do a great job of acting on user suggestions.
Zendesk offers a lot of learning resources for users that will teach you how to use Zendesk and improve your customer service. These include webinars, videos and more.
All phone calls and voicemails are tracked and recorded onto a Zendesk ticket, so you can easily keep a close eye on the types of customer calls and the quality of your team’s support.
You'd think it would be the best Salesforce integration ever since it's owned by Salesforce, but it's completely sub-par. You have to have customer service reps manually connect SF accounts to Desk Companies.
Desk Macros provide a great support for canned responses.
You can write canned responses for email and social media, and access them quickly either through a menu or by using shortcuts.
The UI speeds up your workflow thanks to how uncluttered and intuitive it is.
Everything is well laid out, easy to find, and the overall design is visually appealing.
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.
Zopim does not have all the features you may expect from a User support software. It is owned by Zendesk, so it's recommended you combine the ticketing features of Zendesk with the live chat on Zopim.
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.