OneSignal is a customer engagement platform for companies around the world to enable relationships for them and their customers. This is primarily done by leveraging first party data to personalize and automate messaging through first party channels, such as email, mobile push notifications, web push notifications, and in-app messaging. </p> <p>OneSignal collects this first party data through a software development kit (“SDKs”) that companies use in their mobile applications and websites. These web and mobile SDKs permit app developers and websites to send, manage, optimize and customize messages to their users.