Best OpenTok Alternatives (2020)

Twilio

Brings voice and messaging to your web and mobile applications.
Plivo

Plivo's Voice API enables businesses to build Voice apps to reach customers globally in 200+ countries. Try Plivo's Voice API for free. Instant Sign Up.
Nexmo

Nexmo is a simple two way SMS API with global reach and wholesale rates
Echoplexus

Echoplexus is an anonymous, web-based, IRC-like chatting platform that makes its best effort to...
SendBird

SendBird is messaging-as-a-service.
SightCall

SightCall offers comprehensive real-time video APIs and Mobile SDKs that makes it simple to embed...
Skype

Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
VoxImplant

Voximplant is a software program that allows businesses to automate communications by setting up automatic communication systems in the cloud.
Vidyo.io

Our hosted video chat API makes it simple for devs to embed beautiful multiparty video into apps on any device. Learn more here: https://t.co/4b5EbRg0SG
code-prettify

Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
Telegram

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Bandwidth

Bandwidth offers SIP trunking, Emergency communications, and Voice & Messaging APIs.