Net Promoter Score (NPS)

What NPS Actually Measures

Net Promoter Score comes from a single question: "How likely are you to recommend this product to a friend or colleague?" Respondents answer on a 0 to 10 scale. Based on their score, they fall into one of three buckets:

• Promoters (9 to 10): Loyal enthusiasts who will keep buying and refer others.
• Passives (7 to 8): Satisfied but unenthusiastic customers, vulnerable to competitors.
• Detractors (0 to 6): Unhappy customers who can damage your brand through negative word of mouth.

NPS is not a percentage. It is a score between -100 and +100, and it strips out the passives entirely when calculating the final number.

The Formula

NPS = % Promoters - % Detractors

Passives count toward your total respondent pool but are not directly part of the subtraction.

Worked Example

Say you survey 200 customers:

• 100 respondents score 9 or 10 (Promoters) = 50%
• 60 respondents score 7 or 8 (Passives) = 30%
• 40 respondents score 0 to 6 (Detractors) = 20%

NPS = 50% - 20% = 30

Your NPS is 30. Not a percentage sign, just the number 30.

Why NPS Matters for Early-Stage Founders

At the pre-seed and seed stage, you rarely have enough data for statistically rigorous churn models or cohort retention curves. NPS gives you a fast, cheap pulse check on whether people actually like what you built.

It also correlates with organic growth. Promoters refer friends, leave reviews, and become your first evangelists. If your NPS is strongly negative, no amount of paid acquisition or clever launch tactics will save you, because you are filling a leaky bucket.

Founders running product launches (on Product Hunt, in a newsletter, or through a beta cohort) can use NPS as an early signal of whether the launch messaging matches what people actually experience once they use the product.

How to Run an NPS Survey

1. Timing: Send it after a user has had a real chance to experience value, not on day one. A common trigger is after their first "aha moment" or after 30 days of usage.
2. Channel: In-app widget, email, or a simple Typeform link. Keep it to one question plus an optional open-ended follow-up ("What is the main reason for your score?").
3. Frequency: Quarterly for most early-stage products. More often risks survey fatigue with a small user base.
4. Segment your data: Look at NPS by customer type, plan tier, or acquisition channel. A blended score can hide the fact that your power users love you and your free-tier users do not.

Benchmarks: What's a Good NPS?

Context matters enormously, but rough industry ranges are:

• Above 70: World-class (think Apple, early-stage Slack)
• 50 to 70: Excellent, strong product-market fit signal
• 30 to 50: Good, healthy for most B2B SaaS
• 0 to 30: Average, room for improvement
• Below 0: Warning sign, more detractors than promoters

For a brand-new product with under 50 respondents, treat any single NPS number as directional, not gospel. The qualitative comments matter more than the exact score at this stage.

Common Mistakes

• Surveying too early. Asking a user who signed up five minutes ago produces noise, not signal.

• Ignoring sample size. An NPS of 40 from 6 respondents means almost nothing. Aim for at least 30 to 50 responses before drawing conclusions.

• Treating NPS as the only metric. NPS measures sentiment, not behavior. Pair it with retention rate, activation rate, and actual usage data. A user can say they'd recommend you and still churn next month.

• Not closing the loop. The real value of NPS often comes from the open-ended comments. Read every detractor response personally in the early days. It is some of the highest-signal qualitative feedback a founder can get, and platforms like welaunch.sh can help you turn that feedback into concrete launch and messaging decisions.

• Gaming the survey. Only asking your happiest customers, or excluding churned users from the survey pool, inflates the score and defeats the purpose.

NPS vs Other Loyalty Metrics

NPS is best used alongside, not instead of, metrics like Customer Satisfaction Score (CSAT), which measures satisfaction with a specific interaction, and Customer Effort Score (CES), which measures how easy something was to accomplish. NPS answers "will they stay and tell others," while CSAT and CES answer narrower, more transactional questions.