Everything worth knowing, nothing that isn't.
1. Channel breadth behind one API
The value of CPaaS is consolidation: one integration, one identity, one invoice across SMS, WhatsApp, RCS, voice and email. If you would still need three vendors to cover your channels, it is not really a platform. See /answers/what-is-cpaas and /answers/what-is-omnichannel-messaging.
2. Route ownership vs reselling
Some CPaaS vendors own operator interconnects; others resell another aggregator's routes with a markup and less control over deliverability. Owned, direct routes mean better delivery, cleaner error data, and accountability when something breaks. See /answers/what-is-grey-route-sms.
3. Developer experience
Time-to-first-message is a real cost. Look for maintained SDKs, test credentials you can use against the real API before you sign, clear REST and SMPP references, and webhooks with signed payloads. See /developers and /answers/what-is-sandbox-vs-production.
4. Regional depth and compliance
Global averages hide regional gaps. A provider strong in your actual markets — with local sender-ID registration, operator relationships and data-residency options — will outperform a bigger vendor that is thin where you operate. See /regulations.
5. Reliability, SLA and support
Get the uptime SLA, the throughput ceiling, the route-failover behaviour, and the support responsiveness in writing. BroadNet publishes a 99.99% platform SLA with automatic route failover. See /answers/what-is-route-failover.