title: Web service providing notifications over multiple transports
body: <p>I want to enable event notifications for my customers. There are many possible ways to send notifications: emails, sms, XMPP/other IM, pre-recorded voice messages over SIP, phone-specific message push services, REST callbacks etc.</p>
  
  <p>I don't want to develop all these transports myself, so I need a web service that can manage those notifications for customers. Also I don't want to store emails/phones/other personally identifiable information.</p>
  
  <p>The notifications are transactional (i.e. it's not mass delivering same message to everyone). Paid solutions are welcome.</p>
  
  <p>There is <a href="http://pagerduty.com" rel="nofollow noreferrer">http://pagerduty.com</a> but it is</p>
  
  <ul>
  <li>designed to work within enterprise and not with outside customers</li>
  <li>focused on full cycle of incident response as opposed to simple message delivery</li>
  </ul>
  
  <p>So it puts more burden on respondents and I want something that requires zero effort for the users to setup.</p>
  
  <p><a href="http://www.monitis.com/notification-services" rel="nofollow noreferrer">Monitis</a> is another example. It has multiple transports including Twitter, but again it's designed for insiders and not for service subscribers coming in bulk numbers.</p>
  
  <p>Amazon SNS seems to be too low-level as it only manages delivery of push notifications, but for diplaying them I have to write a mobile app which I don't want.</p>
  
  <p>XMPP servers as described in <a href="https://stackoverflow.com/q/6105506/805266">How best to deliver notifications to various IM / notification services?</a> have traditionally supported the idea of different transports, but I'd like a third-party hosted service.</p>
  
  <p><a href="http://twilio.com" rel="nofollow noreferrer">Twilio</a> has only 2 transports: SMS and voice call and more oriented on full 2-side communications.</p>
  
  <p>I cannot even find the right google keywords to search for the service/SaaS I want.</p>
  
  <p>The question is, are there any such services? A sample of a few would give me an idea of what to look for.</p>