Been using it with mailjet. Since it's open source I just have a job in it that pulls my clients/subscribers from my main app and segments them automatically. I

Been using it with mailjet. Since it's open source I just have a job in it that pulls my clients/subscribers from my main app and segments them automatically. I also define some number goals and can send out deals, updates automatically and just check in when I want. Really good tool, I also updated the template previewer so it's more realtime without the preview click.