What are Growth Metrics?
Growth metrics measure the rate and quality of product expansion. They track not just whether you are growing but how fast, how efficiently, and whether the growth is sustainable. Common growth metrics include month-over-month user growth, viral coefficient, payback period, and net dollar retention.
Growth metrics differ from health metrics. Health metrics (retention, NPS) tell you if the product is working. Growth metrics tell you if the product is expanding. Both are necessary. A growing product with poor retention is a leaky bucket.
Why Growth Metrics Matter
Growth determines whether a product survives. Products that are not growing are dying, because markets evolve, competitors enter, and customers churn. Even a small churn rate requires growth to maintain the user base.
For startups, growth metrics determine funding. Investors evaluate month-over-month growth rate, user acquisition cost, and unit economics to assess whether the business can scale. For public companies, growth metrics drive stock price.
How to Track Growth Metrics
Build a growth model that connects your key levers. Map the relationship between acquisition, activation, retention, revenue, and referral using the AARRR framework.
Track leading indicators. New signup rate is a leading indicator of future MAU growth. Activation rate is a leading indicator of future retention. Monitor these to predict growth before it appears in lagging metrics.
Measure growth efficiency. Revenue growth that costs $3 per $1 earned is unsustainable. Track CAC payback period, burn multiple, and LTV/CAC ratio to ensure growth is capital-efficient.
Segment growth metrics. Overall growth can mask segment-level problems. You might be growing fast in SMB while shrinking in enterprise. Segment by customer type, geography, and acquisition channel.
Growth Metrics in Practice
Slack tracked "teams that sent 2,000+ messages" as their primary growth metric during early expansion. This metric filtered out tire-kickers and measured teams that were genuinely adopting the product.
HubSpot tracks "marketing-sourced revenue" alongside total revenue growth to understand whether their product-led growth engine is working independently of their sales-led motion.
Common Pitfalls
- Celebrating top-line growth while unit economics are broken. Growing 50% MoM at a negative contribution margin is burning cash, not building a business.
- Ignoring retention in growth metrics. A 20% monthly growth rate with 15% monthly churn means you are only netting 5%. Track net growth.
- Optimizing one metric in isolation. Improving acquisition while degrading activation produces more signups but not more users.
- Comparing apples to oranges. Growth benchmarks vary wildly by stage, market, and business model. Compare to your own trajectory, not to unrelated companies.
Related Concepts
Growth metrics are organized by the AARRR framework and powered by growth loops. They are a key focus of product-led growth strategies. The north star framework helps identify which growth metric matters most. For measurement, see product analytics.