Hey this is Josh, the other Outbound founder. Good question, sandstrom. The key difference with Customer.io (other than SMS and mobile push) is that we're built

Hey this is Josh, the other Outbound founder. Good question, sandstrom. The key difference with Customer.io (other than SMS and mobile push) is that we're built on your event stream: we use events to send messages but also to tell you what effect each message you send has on customer actions inside your product.