We used GetResponse for years and would have little hesitation going back to them. They offer integrations with just about everyone, and are constantly adding to their platform. One reason we left is that they seemed to be trying to do “too” much in our opinion. They have added a landing page builder, etc and we wish they would have refined their interface a bit more instead of adding more to it. It's still a great platform, however, and if you want a larger suite of marketing tools built-in, check them out!