Consider alternatives when:
- Modern compliance assurances (SOC 2 Type II, ISO 27001, audited controls) are required and the vendor cannot provide them promptly.
- Active product development, public documentation, and developer tools are required for engineering adoption.
- Your organization is not a mobile operator and primarily needs A2P messaging, customer support texting, or marketing messaging—CPaaS vendors typically provide faster time-to-market and lower integration risk.
- Omnichannel capabilities (WhatsApp/Viber/FB Messenger) with contemporary routing, consent management, and deliverability controls are required.
- Vendor continuity risk (domain downtime, unclear corporate ownership, unclear roadmap) is unacceptable.