LiveFyre vs Talk: What are the differences?

Developers describe LiveFyre as "We make your site social". Livefyre’s real-time apps get your audience talking and turn your site into the hub for your community. Bloggers, brands and the largest publishers in the world use Livefyre to engage their users and curate live content from around the social web. On the other hand, Talk is detailed as "A better commenting experience from Mozilla, The New York Times, and The Washington Post". Online comments are broken. Our open-source Talk tool rethinks how moderation, comment display, and conversation function, creating the opportunity for safer, smarter discussions around your work.

LiveFyre and Talk can be primarily classified as "Commenting Service" tools.

Talk is an open source tool with 1.26K GitHub stars and 252 GitHub forks. Here's a link to Talk's open source repository on GitHub.