Quality and deliverability for business SMS & co.
If your text messages cannot be delayed, phone calls have to be clear or phone intelligence has to be accurate, network quality is of the utmost importance. Having direct connections to mobile operators increases the deliverability. The fewer hops to deliver communications, the better.
Network availability and diagnostics
If the CPaaS provider is part of the telecom world, with deep access to network availability, it is faster and easier to solve issues for enterprises. CPaaS providers that focus more on APIs and orchestration have no control over the network might leave you hanging in the dark to solve a simple problem.