1. UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.

  2. Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system

  3. Disqus is a global comment system that improves discussion on websites and connects conversations across the web.

  4. Easy to set up, ad-free and reliable comment system

    freemium $5.0 / Monthly

  5. Get Satisfaction is the leading customer engagement platform that helps companies build better relationships with their customers and prospects, through the best online customer community.

  6. Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript.

  7. A fast, bloat-free comments system to foster discussion on your website

  8. HashOver is a PHP comment system intended as a replacement for services like Disqus.

  9. talkatv is an open source comment service much like ...

  10. Free online usability surveys with demographic information. Detailed click tracking for websites and feedback button for online user forum. Easy signup.

  11. Collect feedback on your website and find out more about your visitors.

  12. Online customer support solution - Feedback Forum, Helpdesk (ticketing service), Knowledge Base and Live Chat by UserEcho