Marketo is an exceptional tool for managing a sales funnel program. We have taken the work of 3 to 4 people tracking various emails and different stages and automated the entire process. What makes the program powerful is that there are alerts, actions, and updates set-up through out the process to engage the sales team and sales engineering group to activities within their accounts. We utilize lead scoring to elevate targeted and engage prospects, sales alerts to notify of actions with content or transitions through various stages, landing pages and emails to "drip nuture" them through the processs. It's an all-in-one program.