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Well done - you've just added text chat to your video chat app!

There's more you can do with OpenTok. Check out the resources below for more information on how to build for the web, iOS, and Android.

Core Concepts

Learn about the OpenTok platform, the languages we support with our client SDKs and server SDKs, the architecture of our platform, and more.

Developer Guides

More tutorials on how to build with the OpenTok platform, including handling exceptions, security considerations, and debugging.

Client SDKs

Learn about and download our client SDKs for iOS, Android, and Web

Server SDKs

Learn about and download our server SDKs in Java, Node.js, Python, .Net, PHP, and Ruby.


Learn about tools to help improve your OpenTok-powered application.

Want to learn how to build for mobile?

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