I partnered with Standard Metrics @metrics_co to dig into their latest Rule of 40 data across 1,377 venture-backed private companies with $1M+ in revenue Only 27.9% actually clear the Rule of 40, and 89% of those companies get there primarily through growth. Just 3% of the entire sample are profitable operators clearing the bar through margins. So while the Rule of 40 is often framed as a balance between growth and profitability, that’s not really what the private-market data shows. The full breakdown: - 24.9% are high growth + Rule of 40, - 3.0% are profitable + Rule of 40 - 23.7% are high growth but burning too much - 48.4% are low growth + below Rule of 40. The efficiency data is even more interesting. Rule of 40 growth leaders spend a median 28.9% of revenue on sales & marketing, compared with 57.2% for high-growth companies that fail the Rule of 40. In R&D, the winners generate ~5.5 points of revenue growth for every point of revenue spent, versus just 1.4 for companies below the threshold. But clearing the Rule of 40 isn’t necessarily durable. Only 37% of the top growth cohort stayed there 12 months later, while 36% fell all the way into the bottom zone. Meanwhile, 60% of today’s top companies weren’t even in the top zone a year ago. AI makes the comparison even more extreme: AI companies in the top zone are growing a median 307% with -45% EBITDA margins, versus 117% growth and -9% margins for non-AI companies. Growth still matters enormously, but efficient growth is what separates the best companies, and tracking the metric over time matters far more than a single-quarter pass/fail. Full analysis of all 1,377 companies 👇