Alternativ till PPMessage för Software as a Service (SaaS) med öppen källkodslicens

• Software as a Service (SaaS)
  Alla plattformar Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Safari Internet Explorer Wordpress Shopify Chrome Joomla BigCommerce Drupal
• Open Source-licens
  Eventuell licens Gratis licens Open Source-licens Kommersiell licens