Haydle
Haydle is an enterprise Q&A solution.
12 Alternatives To Haydle

AnswerHub
AnswerHub software helps developers capture, organize, and share their knowledge for greater productivity, innovation, and user satisfaction.

Answerbase
Add a Q&A system to your website in just minutes, with Answerbase’s powerful question and answer software for online communities and customer support.
Askalot
Askalot is a next generation CQA (Community Question and Answer) system.
Coordino
Coordino allows you to create a question and answer system for you and your users to enjoy.
Jitsi
Open-source video calling and chat platform.
Pubble
Pubble is a community engagement platform that brings the social web to your site. Change how you interact with your audience while continually enhancing your web site.
Quora
Quora is a place to gain and share knowledge. It’s a platform to ask questions and connect with people who contribute unique insights and quality answers.
Solace
Solace is a fully open-sourced multilingual support and knowledge exchange platform written in…
Stack Overflow
Community-based Q&A part of the Stack Exchange platform.

Super User
Super User, part of https://alternativeto.
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.