Official cloudThe vendor offers a hosted version: sign up and use it without deploying anything. Free tier or trial depends on the vendor.
Mautic: Open Source Marketing Automation Software.
Marketing automation
From the README
Mautic is the world’s largest open source marketing automation project. We empower businesses and organizations to deliver fully integrated marketing campaigns by providing powerful, world-class open source marketing automation software supported by a thriving, worldwide community of passionate cont…
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
