Twilio has partnered with Meta to offer WhatsApp Business Calling API in Private Beta. This feature allows businesses to add Voice-over-IP (VoIP) calling to their communications on the WhatsApp consumer application, improving customer engagement and support. Existing Twilio Programmable Voice customers can request to participate in the beta if they meet certain conditions. The integration of VoIP technology offers high-quality, flexible, and cost-effective voice communication, which can boost sales, increase engagement, and provide better customer support.