Open Source C# Marketing Automation Software for Linux

Leverage the email service that customer-first brands trust for reliable inbox delivery at scale. This library allows you to quickly and easily use the Twilio SendGrid Web API v3 via C#. Manage your Twilio SendGrid API Keys by storing them in Environment Variables or in Web. It is a good practice to keep your data and configuration settings separate. This way you can change your Twilio SendGrid API key without changing your code. Also, we strongly advise against storing sensitive data directly in your code. Integrate in minutes with our email API and trust your emails reach the inbox. Build meaningful connections with smart email marketing. Seamlessly integrate with our partners and major platforms. Create emails with HTML code, a drag-and-drop editor, or a combination of both. Engage contacts with approachable, time-saving automation.

Tustena CRM is an Enterprise-Class Customer Relationship Management server written in C# for the .NET platform with many advanced features like Companies/Leads/Contacts Manager, Calendaring, Groupware, Email Marketing, Reporting, Orders, Catalogs, etc.

Scooter is a Customer Relationship Management Application that offers all the functionality of sales force automation, marketing automation, and customer service and support. Its unique advantage is that it replicates with SugarCRM but runs locally.