Alternativy k mailgen pro Salesforce.com s licencí open source

• Salesforce.com
  Všechny platformy Windows Mac Linux Chrome OS Web Self-Hosted Software as a Service (SaaS) Chrome insightly Zoho CRM Pipedrive Salesforce.com HubSpot
• Licence Open Source
  Jakákoli licence Bezplatná licence Licence Open Source Komerční licence