4) “Pure play” lead management – this group is lead by Eloqua , but there are a LOT of firms throwing their hat into this ring including Vtrenz, Hubspot, Manticore, Market2Lead, Marketo, LoopFuse, einsof, iHance, Precience, among many others. There are at least 4 amorphous groups of solution providers also setting their sights on this space: 1) Lead generation services or tools – Because this category contains both service providers (that look more like agencies or telesales outsourcers) and software as a service vendors, there are probably more than I could possibly name.