Alternativer til Swurveys til MailChimp med open source-licens

• MailChimp
  Alle platforme Windows Mac Linux Chrome OS Android iPhone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Slack Microsoft Office 365 MailChimp Trello Zapier Salesforce.com HubSpot Google Drive - Sheets Intercom Autopilot
• Open Source-licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens