hvenk

SparkPost/MessageSystems claims to have the highest inbox rate in the space, and their customer list backs this up. It's much more impressive than Asana, Desk, and Minecraft (think LinkedIn, Facebook, Zillow, Pinterest, etc).

They absolutely recognize that ESPs are a commodity, even reselling delivery to ExactTarget, Responsys, etc, as the "pipe". It's hard to believe your reasoning when the industry leader is saying something different.