I use bulk sms to promote my business. I don't know why many people prefer another kind of marketing, I think that sms is the best thing for internet business. I voted for Zapier. It sounds to me like the best application that is well automated. I generally like anything that works great on its own. That's why I prefer to work with sms. Everyone has a phone these days. Whatever it is. It supports sms services. So it's the best option for advertising.