Who are competitors to Echelon?

Could you elaborate on the key competitors that Echelon faces in the current market landscape? Who are the main rivals that pose the greatest threat to Echelon's market share and growth prospects? Are there any established players with a significant lead in terms of technology, user base, or funding? What strategies do these competitors employ to differentiate themselves and attract customers? Additionally, are there any emerging competitors that Echelon should be keeping a close eye on, given their potential for disruption or rapid growth?