List building is crucial for anyone running an online business. Whether you run a blog or have an e-commerce store, growing your email list is very important. Building an email list is simple but not easy. You can find tons of information out there on list-building methods. Some of these methods include using pop-ups, content upgrades, fly-ins, etc. And that’s all good. But what about the tools to use for growing your email list? There are many tools available but which one is the best? In ...