A short field guide before you sign the SaaS contract.
A customer data platform is the right answer roughly half as often as the sales team will tell you. The question that matters: what's the bottleneck you're trying to remove? If it's identity resolution across channels, real-time triggers, or a single source of truth for marketing operations, a CDP is probably the right tool. If it's reporting, attribution, or analytics, you're looking at the wrong category.
When you do need one
When marketing wants to ship campaigns without an engineering ticket. When data lives in five places and your team is hand-syncing exports. When your privacy posture demands a single point of consent enforcement.
When you don't
When you have one channel, one system of record, and a small enough catalogue that segments fit in a spreadsheet. When the real problem is creative production speed. When your team can't articulate the journeys they'd build with one.