AnyRoom vs Grasshopper: What are the differences?

Developers describe AnyRoom as "A self-hosted, Twilio-based system for temporary conference calls *". Create unique conference rooms on demand, without having to reuse the same IDs. Self-hosted free option works for most, but commercial licensing is available for more features and support. On the other hand, *Grasshopper** is detailed as "The entrepreneur’s phone system". Sound more professional and stay connected with Grasshopper, the Virtual Phone System designed for entrepreneurs. Grasshopper works just like a traditional phone system, but requires no hardware to purchase or software to install.

AnyRoom and Grasshopper can be categorized as "Phone" tools.

AnyRoom is an open source tool with 229 GitHub stars and 13 GitHub forks. Here's a link to AnyRoom's open source repository on GitHub.