NPS vs CSAT vs CES: which metric should you use?

NPS, CSAT, and CES are the three most widely used satisfaction metrics, and it's common to see them used interchangeably as if they measured the same thing. They don't: each one answers a different question, and picking the right one depends on what you actually want to know.

NPS (Net Promoter Score): long-term loyalty

The classic question is "How likely are you to recommend [product] to a friend or colleague?", on a 0 to 10 scale. It splits respondents into detractors (0 to 6), passives (7 and 8), and promoters (9 and 10), and the final score is the percentage of promoters minus the percentage of detractors. NPS measures overall brand loyalty, not a single interaction, which is why it's usually measured infrequently (quarterly or twice a year) rather than after every touchpoint.

CSAT (Customer Satisfaction Score): satisfaction with something specific

CSAT asks directly "How satisfied were you with this purchase, this support interaction, or this feature?", on a short scale (typically 1 to 5). Unlike NPS, CSAT is point-in-time: it measures a specific experience, not the overall relationship with the brand. It's the right metric for evaluating a support ticket, a checkout flow, or a new feature.

CES (Customer Effort Score): how much effort it took

CES asks "How easy was it to resolve your issue?" instead of asking about satisfaction directly. The premise behind CES is that ease predicts future loyalty better than satisfaction does: people don't care as much that the experience was pleasant, they care that it was fast and frictionless. It's especially useful for evaluating technical support or self-service processes.

• Use NPS if you want to measure the overall health of your customer relationships over time.
• Use CSAT if you want to evaluate a specific interaction, product, or feature.
• Use CES if your focus is reducing friction in a specific process (support, onboarding, checkout).

You don't have to pick just one

Many companies use all three at different points in the customer journey: CES after a support ticket, CSAT after a purchase, and quarterly NPS for overall account health. What matters is understanding which question each one answers, so you don't draw the wrong conclusions from a number that actually measures something else.