Curatemails is a email signature marketing tool. In simpler terms, Email signature marketing is a process of leveraging your outbound emails for promoting your products/padcast/app/webinar etc. The pressing point here is that you don't need to create a new marketing chanel. There must be 100s of emails being sent out every month. You just need to attach a customized content with every email you send.
I'm cheaper then the other since i'm still pretty new but I can get the job done. My pricing is pretty flexible since this is not my full time job and it's just to get work experience. I have worked with Mongodb and couchdb for personal projects such as a sms trading game which stored users and cards and could trade through sms.
I'm not the best at flask but I use it to host my sms game to twilio and pythonanywhere.