The Flywheel beats the Funnel (and HubSpot figured this out 8 years too late)

In 2018, HubSpot announced they were replacing the funnel with the flywheel. It was 30 years too late. The physics were always right.

The difference

• Funnel. Customers enter at the top, fall out at the bottom. You constantly pour new ones in.
• Flywheel. Customers enter, get energy from your service, power the next revolution of the wheel, attract the next customer.

Same customers. Different physics. The funnel treats each one as a transaction. The flywheel treats each one as compounding energy.

Why flywheels win

Because acquisition is the expensive part. Retention is cheap. If your existing customers are your best acquisition channel — through word-of-mouth, reviews, referrals, upsell — your CAC drops to zero over time.

The flywheel math

• 100 customers, NPS 50, 30% referral rate → 30 new customers/month from existing.
• Acquisition cost: ~$0 for referred, full CAC for cold.
• Over 12 months, your blended CAC drops 40-70%.

How to build one

1. Make the product so good the customer would notice if it disappeared. (See: IM ME Test.) 2. Instrument the share moment. Built-in referral links, public reviews, share-on-social CTAs *in the product*. 3. Reward the referrer and the referred. Two-sided incentives work. 4. Measure the wheel. Track NPS, referral rate, second-order revenue.

The BAZ Empire take

The Hub's Cockpit shows you your flywheel score on the Patrick Number. Your retention cohort, your NPS, your referral rate — all in one place. The Audit tells you where the friction is.

See your score: [/leads](/leads).