SENDUNE makes it easy to store all your contacts send them targeted messages. When a user signs-up on your web or mobile app, you insert their details (name, email, number, etc.) into SENDUNE. Thereafter any action done by that user can be inserted and tracked in SENDUNE. For example if a user adds 'red shirt' to their wish-list, you attach the tag 'red shirt' to that user. All of this is done using the SENDUNE 'Contacts API'. You can then filter your users using a combination of tags to send targeted messages (Emails, SMS, OTP's). Messages can be sent manually via the dashboard or programmatically by calling the API or by using workflow rules. For example you can trigger a workflow as soon as a particular tag is added to a contact. SENDUNE integrates with your own AWS account to send messages. Why? Because AWS is unbeatable in terms of cost and message reliability.