B2B functions that are collaborative, interdependent, supportive, and coordinated can be “power couples” that accomplish incredible things — and the collaboration of customer marketing and customer success is one such example. Each of these functions provides critical postsale customer engagement, and when they work together, their impact multiplies. In this report, we define the responsibilities of customer marketing and customer success, explain the challenges of implementing one or the other or both, and share best practices for aligning them.