Read the original at Lenny’s Newsletter ↗lennysnewsletter.com · subscriber post
By Lenny Rachitsky · lennysnewsletter.com · @lennysan on X · YouTube · LinkedIn
Lenny Rachitsky lays out the four metrics he considers most important for an early marketplace: fill rate, bookings growth, supply growth, and GMV growth. He explains why each matters, shares practitioner perspectives, and argues that the vague term 'liquidity' should be replaced with specific, defined operational metrics.
Subscriber post — summary only01Key takeaways
- Fill rate, the share of intentful sessions that convert, is the best overall measure of marketplace health.
- Bookings growth isolates usage trends from pricing and order-size noise, making it a strong growth north star.
- Track activated supply, not raw sign-ups, and watch time to activation to avoid useless supply incentives.
- GMV growth tracks revenue potential, often approximated as transactions multiplied by average order value.
- Avoid the word 'liquidity' in operational discussions; define it with concrete metrics like search-to-fill rate.
“The prime directive of a marketplace is to generate liquidity where none existed before.”Alex Taussig · Lenny’s Newsletter
“Figuring out how to generate liquidity is the single most important thing for a marketplace.”Grant LaFontaine · Lenny’s Newsletter
02Frameworks mentioned
Summary and takeaways written by PM Atlas; quotes are short excerpts. © the original author.