North star metric: how to pick yours
Your north star metric is the single number that best captures the value your product delivers. Pick the right one and it aligns everything you do. Pick the wrong one and you'll optimize for the wrong outcomes.
A north star metric (NSM) is the one measurement that best represents the core value your product delivers to customers. When this number goes up, your business is genuinely healthier. Not just growing, but growing in a sustainable way that creates real value.
Facebook's is daily active users. Airbnb's is nights booked. Slack's is messages sent. These aren't revenue metrics. They measure value delivery, and revenue follows. Finding yours is one of the most important strategic decisions you'll make.
What makes a good north star metric
A good NSM has three properties. First, it measures value delivered, not value captured. Revenue is value captured; it tells you how much money you're making. Weekly active users who complete a core action is value delivered; it tells you how many people are getting what they came for. Focus on delivered value and captured value follows.
Second, it's a leading indicator of revenue. If your NSM goes up today, revenue should go up in the future. If weekly active users increase this month, subscriptions should grow next month. This leading quality gives you early signal: you can see problems (or wins) before they hit your bank account.
Third, it's something every team function can influence. Engineers can improve it by making the product faster. Marketing can improve it by attracting the right users. Support can improve it by helping users succeed. If only one team can affect the metric, it's too narrow to be a north star.
Common north star metrics by product type
SaaS products often use weekly active users who perform a core action. For a project management tool, that might be "teams with 5+ tasks updated this week." For an email marketing tool, "users who sent a campaign this week." The core action should be the behavior that correlates with retention.
Marketplace products use transaction volume: nights booked (Airbnb), rides completed (Uber), items sold (Etsy). These capture value for both sides of the marketplace. Content platforms use engagement: daily active users (Facebook), minutes watched (YouTube), messages sent (Slack).
For a growth experimentation tool like Golden Gecko, a good NSM might be "experiments completed per week" because it captures the core value: helping founders systematically test and learn. When that number goes up, founders are getting real value, and the business should be healthy.
How to find your north star metric
Start by listing the core value moments in your product. When does a user get real value? For a CRM, it's when a deal closes. For a design tool, it's when a design gets shared. For an analytics tool, it's when an insight leads to a decision. These value moments are your candidates.
Next, test each candidate against the three criteria: does it measure value delivered? Is it a leading indicator of revenue? Can different functions influence it? Eliminate any that fail one or more criteria. You'll usually end up with two or three contenders.
Finally, validate with data. Look at the correlation between each candidate metric and long-term retention. The metric that best predicts whether a user sticks around for 6+ months is usually your best north star. If users who complete 3+ experiments in their first month retain at 80% vs 20% for those who don't, "experiments completed" is a strong candidate.
Common mistakes when choosing a north star
The most common mistake is picking revenue. Revenue is an outcome, not a driver. It's a lagging indicator that tells you about decisions users made weeks or months ago. By the time revenue drops, the underlying problem has been festering. Your NSM should give you earlier signal.
Another mistake is picking a vanity metric like total signups or page views. These always go up (as long as you exist) and don't tell you anything about health. Your NSM should be able to go down, and when it does, it should scare you into action.
A third mistake is changing your NSM too often. It takes months for a north star metric to become embedded in your decision-making. If you switch every quarter, you never build the muscle of optimizing for one thing. Pick one, commit for at least six months, and only change it if you discover it's genuinely misleading you.
Using your north star metric day to day
Once you've picked your NSM, make it visible. Put it on a dashboard you see every day. Mention it in your weekly review. When evaluating any decision, whether it's a new feature, a marketing campaign, or a partnership, ask: "Will this move the north star?" If the answer is no or unclear, deprioritize it.
Use input metrics to diagnose changes in your north star. If your NSM is weekly active experiments and it drops, look at the inputs: new user signups, activation rate, experiment creation rate, experiment completion rate. The input that dropped tells you where to focus your next experiment.
Remember that the north star metric is a compass, not a GPS. It tells you the direction, not the exact path. You still need to use judgment, talk to users, and sometimes work on things that don't directly move the metric (like paying down tech debt or fixing bugs). But when you're unsure what to prioritize, the NSM is your tiebreaker.
Problems this guide helps with
Users try once and never come back
Users have a good first experience but don't form a habit. They liked it, they just forgot about you. There's no hook bringing them back.
Users drift away and forget you exist
Users were active, then gradually stopped. They didn't churn dramatically - they just faded away. You're invisible to them now.
Put this into practice
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