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NPS vs CSAT vs CES: which survey for which moment
A practical guide to Net Promoter Score, customer satisfaction, and customer effort: what each measures, when to use it, and how to avoid mixing scales.
Product teams often ask for "an NPS program" when they actually need a satisfaction check after support, or an effort score after a hard workflow. NPS, CSAT, and CES answer different questions. Using the wrong one produces dashboards that look busy and decisions that miss the moment.
NPS: relationship and willingness to recommend
Net Promoter Score asks how likely someone is to recommend you, usually on a 0-10 scale. You classify promoters (9-10), passives (7-8), and detractors (0-6), then compute promoters minus detractors as a percentage of respondents.
Best moments: periodic relationship checks, post-onboarding once value is visible, quarterly product health, or after a major release when you care about advocacy, not a single ticket.
Weak moments: immediately after a password-reset flow, or as a proxy for "was this support agent nice?" NPS is a broad relationship signal. It is slow to explain a single friction point.
CSAT: satisfaction with a specific experience
Customer satisfaction usually asks how satisfied someone is with an interaction or outcome, often on a 1-5 (or similar) scale. You are not asking about lifelong loyalty; you are asking whether that moment worked.
Best moments: after support resolution, after a purchase or delivery, after a success-team engagement, or after completing a defined job in the product.
Weak moments: as your only company-wide health metric. CSAT is great at the episode level and easy to game if you only survey happy paths.
CES: effort to get something done
Customer effort score asks how easy it was to complete a task or get an issue resolved. High effort predicts churn and support load even when people say they "like" you in the abstract.
Best moments: after complex setup, checkout, claims, returns, permissions changes, or any workflow you suspect is too hard.
Weak moments: brand tracking. Effort is tactical. It tells you where to simplify, not whether someone would recommend you at a dinner party.
A simple chooser
- Care about advocacy and long-term relationship? Start with NPS.
- Care about whether a specific interaction was good? Use CSAT.
- Care about friction in a task? Use CES.
- Need product-market fit signal for early-stage direction? That is a different instrument (for example a PMF survey), not a substitute CSAT.
Do not mix scales in one trend line
NPS 0-10 and CSAT 1-5 are not interchangeable. Importing or charting them as one series invents a story. Keep survey types separate, label axes honestly, and if you migrate history from another tool, confirm metric type before you commit rows.
Operational tips that matter more than the acronym
One good question beats a long form people abandon. Optional comment fields capture the why. Thin samples should not drive executive narrative: prefer tooling that shows sample size and uncertainty instead of a lonely integer. Survey the moment, not every click. Close the loop when someone is unhappy; the metric is a triage signal, not a trophy.
Bottom line: pick NPS for relationship, CSAT for episode satisfaction, CES for effort. Match the metric to the moment, keep scales pure, and read scores next to comments and sample size. The right question at the right time beats a fashionable dashboard with the wrong unit.