We are coming from the Marketing Agency side and we are using the Pipedrive and ActiveDEMAND integration for both our clients and our own needs. It makes Pipedrive extremely powerful. It allows us so much from sales nurturing to funnel analysis and more and more. I highly recommend both ActiveDEMAND and Pipedrive.
About the Author: ActiveDEMAND

ActiveDEMAND is a marketing technology vendor that helps marketers simplify their marketing stacks. It is a web-based marketing automation tool specifically designed for small to medium sized businesses. ActiveDEMAND delivers as an integrated marketing platform that enables marketers, agencies, and businesses to supercharge their marketing efforts through streamlined campaign management, campaign recipes, and attribution reporting while integrating with many other businesses, sales, and marketing applications. Its set of capabilities, features, options, and tools make it a versatile integrated marketing platform for digital marketing agencies and small business marketers. It enables its users to take control of their marketing whether it be building campaigns, tracking data, viewing dashboards, or managing their brands.