Yeastar P-Series PBX System's pricing is best suited for small businesses and mid-market organizations, which represent the overwhelming majority of G2 reviewers. Industries including telecommunications, IT services, computer networking, education, healthcare, and real estate appear frequently across G2 reviews. Small businesses with 5 to 100 users benefit from modular scaling and inclusive feature sets without heavy per-feature costs. Mid-market deployments in the 51 to 1,000 employee range leverage call center, multi-site, and CRM integration capabilities. G2 reviewers flag that enterprises exceeding 500 users may find hardware-based P-Series models less competitive, with one enterprise reviewer specifically citing the 500-user extension ceiling as a limitation.