Google+ Hangouts API is described as 'The Hangouts API provides the programming interface to Hangouts video calls' and is a Video Chat App in the Development category. There are more than 10 alternatives to Google+ Hangouts API, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and Windows. The best alternative is Twilio, which is free. Other great sites and apps similar to Google+ Hangouts API are Plivo (Paid), Tellephant (Free), SendSMSGate (Paid) and Videsk (Paid).
Twilio is a web-service API that lets you use your existing web languages and skills to build voice and SMS applications. We focus on building a simple, powerful, pay-as-you-go communications platform so that you can focus on what you do best.
Plivo is a voice and SMS API platform that enables developers and enterprises to build powerful apps with great features. With 24/7 free tech support and low prices, Plivo can help your business scale globally.
International Communication Platform as a Service (CPaaS) provider with zero-hop connectivity to telecoms globally. It supports all major mobile communication channels, like SMS, email, WhatsApp, Viber, voice, video and more, over API and web UI.
Blitzz is a video powered, enterprise field service platform that quickly becomes the smart, system of record for all collaborative events between field techs, HQ support and end users of physical equipment in the field.