CSAT vs NPS
CSAT (Customer Satisfaction Score) measures how a customer felt about one specific interaction. NPS (Net Promoter Score) measures how a customer feels about the company overall. They answer different questions, and using the wrong one gives you the wrong data.
The Core Difference
| CSAT | NPS | |
|---|---|---|
| Question | "How satisfied were you with this interaction?" | "How likely are you to recommend us?" |
| Scale | 1-5 (usually) | 0-10 |
| Measures | A single transaction | The overall relationship |
| Best timing | Immediately after a support ticket, purchase, or feature use | Quarterly, not per-transaction |
| Volatility | Reacts fast to one bad interaction | Moves slowly, reflects trends |
When to Use CSAT
Use CSAT right after something specific happens: a support conversation ends, a purchase completes, a feature gets used for the first time. It's a snapshot, not a trend line - which is exactly what makes it useful for spotting problems with a specific agent, workflow, or feature.
When to Use NPS
Use NPS on a recurring cadence (quarterly is typical) to track loyalty over time. It's a poor fit for transaction feedback - asking "would you recommend us?" right after a single support ticket produces noisy, unreliable data. NPS earns its value as a trend line across quarters, not as a one-off score.
Why the Two Can Disagree
A team can have excellent CSAT (support interactions go smoothly) while NPS quietly declines (customers are unhappy about pricing, missing features, or a better competitor offer). CSAT alone would miss this entirely - it only sees the interactions it's asked about. This is the main reason mature support teams track both rather than picking one.
For the full picture, including CES (Customer Effort Score) and how to set these up correctly, see our customer satisfaction measurement methods guide.
Related Reading
- Customer Satisfaction - the full definition and how it's measured
- Customer Service Metrics - the complete set of support KPIs
- Customer Satisfaction Measurement Methods - CSAT, NPS, and CES in depth