Saplo is a Swedish incarnation of semantic analysis. Born out of academia, the Saplo API is built on computer science and applied mathematics. This company is effectively commercializing academic research topics. What makes Saplo stand out immediately as an API provider is its list of active customers which includes two Nordic news sites. This shows that they are serious about the business behind the Saplo API and also successful at convincing experienced media players that semantic analysis is a tool that they should employ.
Deciding what metrics matter depends on the overall strategy goals and business model that aligns with your APIs. This is why defining the business model was one of the first steps in your decision series. Now we need to make sure our evaluation framework matches back up to what we set out to do.