Alternativas ao Pollscape para MailChimp com licença de código aberto

• MailChimp
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Android Wear iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Java Mobile Wordpress Slack S60 Facebook Messenger Chrome Web Store MailChimp Trello Salesforce.com HubSpot Google Drive - Sheets Intercom Autopilot
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial