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. Tools that analyze who’s clicking – and help B2B marketers make heads or tails out of Google’s analytics – are bleeding over into the lead management space. Now, the former type of tool has traditionally (and it's a brief tradition!)