Star Ratings vs NPS vs CSAT: Which Metric Should You Use?

"Which metric should I use?" is one of the most common questions we hear from new customers. The honest answer is: it depends on what decision the data needs to inform. Here's how the three most popular metrics differ and when each one shines.

Star Ratings

Star ratings (typically 1–5) are the most familiar format to consumers thanks to app stores and e-commerce reviews. They're best for quick, low-friction feedback on a single item — a product, a purchase, a piece of content. Their familiarity means near-instant comprehension and very low abandonment.

Net Promoter Score (NPS)

NPS measures loyalty and likelihood to recommend on a 0–10 scale. It's a relationship metric, not a transactional one — best used quarterly or biannually to track whether your overall customer sentiment is trending up or down. NPS is highly benchmarkable across companies and industries, which makes it popular with leadership teams.

Customer Satisfaction (CSAT)

CSAT measures satisfaction with a specific interaction, typically on a 1–5 scale. It's the right tool immediately after a support ticket, purchase, or onboarding flow — anywhere you need a fast pulse-check on a discrete moment rather than the overall relationship.

Customer Effort Score (CES) as a Fourth Option

Beyond the three metrics above, Customer Effort Score measures how much effort a customer had to expend to get something done — "How easy was it to resolve your issue today?" on a low-effort-to-high-effort scale. CES is particularly predictive of loyalty in support and service contexts, since research consistently shows that reducing customer effort correlates more strongly with repeat purchase behavior than simply delighting customers. Consider adding CES alongside CSAT for support interactions specifically, where friction is often the real story behind a satisfaction score.

Building a Layered Measurement Stack

The most mature feedback programs don't pick one metric — they layer several, each answering a different question. NPS quarterly answers "are we building loyalty over time?" CSAT after key touchpoints answers "did this specific interaction go well?" CES after support interactions answers "did we make this easy?" And star ratings on individual products or content pieces answer "which specific things are working?" Layering metrics this way avoids the trap of trying to make a single number do too much analytical work.

Choosing Between Them

A simple heuristic: if you're asking "how do people feel about us overall," use NPS. If you're asking "how did this specific interaction go," use CSAT or a star rating. Many mature feedback programs run all three — NPS quarterly, CSAT after key touchpoints, and star ratings on individual products or content.

The metric matters less than the discipline of acting on what it tells you. A perfectly chosen metric that nobody reviews is worth less than an imperfect one that drives weekly decisions.