HipChat vs Yammer: What are the differences?

What is HipChat? Supercharge team collaboration with group chat and IM. HipChat is a hosted private chat service for your company or team. Invite colleagues to share ideas and files in persistent group chat rooms. Get your team off AIM, Google Talk, and Skype — HipChat was built for business.

What is Yammer? Yammer is a Private Social Network for Your Company. Yammer brings the power of social networking to your company. Collaborate securely across departments, geographies, content and business applications.

HipChat and Yammer are primarily classified as "Group Chat & Notifications" and "Enterprise Collaboration" tools respectively.

Some of the features offered by HipChat are:

• Desktop apps (Windows, Linux, Mac)
• Mobile apps
• Web app

On the other hand, Yammer provides the following key features:

• Accessing Yammer- Access Yammer from anywhere with an internet connection. Stay connected from your web browser, mobile device, or tablet. You can also view and interact with Yammer content within other business applications -- such as Sharepoint - using our API integrations.
• People and Conversations- Whether your company spans seven cubicles or seven continents, Yammer helps your team collaborate on content, ask questions, share knowledge, and get work done.
• Content Collaboration- Create, discuss, and share content with coworkers without sending a single email. Store large files, post documents to team workspaces, and collaboratively edit Pages in real time.

According to the StackShare community, HipChat has a broader approval, being mentioned in 308 company stacks & 116 developers stacks; compared to Yammer, which is listed in 11 company stacks and 7 developer stacks.