Wednesday, 20 May 2026

The Briefing

A CAC payback period of 32 months in the $1M–$5M ARR band signals structural inefficiency—companies at this scale should be recovering acquisition costs in 18–24 months, not nearly three years. The gap between ambition and unit economics widens precisely when growth-stage firms face the steepest reinvestment demands, a tension Dave Kellogg has dissected with unusual clarity in his recent Q1 benchmarking work. Today's selections explore this friction: the emerging debate over whether lengthening payback windows reflect market maturity or execution failure, and fresh data on AI-powered security firms where customer concentration and complex sale cycles push payback even further. Watch whether post-AI vendors reset investor expectations or merely postpone the reckoning.

Today's Number

CAC Payback Period

32

SIM–SSM ARR band

Active DebateAI in Finance

KeyBanc vs OnlyCFO

Claim 6 shows nearly all SaaS companies expect to invest in AI with anticipated operational impacts, while claim 9 indicates over 50% of finance leaders lack an AI strategy, suggesting investment intention without strategic clarity.

Nearly all SaaS companies in the survey expect to invest in AI in 2025, with impacts to business operations anticipated within the next 3 years
— KeyBanc Capital Markets & Sapphire Ventures 2025 SaaS Survey: AI-Driven Growth & Profitability Focus
Over 50% of finance leaders have no AI strategy for adopting AI into finance and accounting
— How to AI (CFO Edition): AI Adoption Strategy and Finance Use Cases
Rising Author

Dave Kellogg

3 new articles in the last 60 days · up 90% vs prior 60d · 207 all-time

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Fresh BenchmarkTomasz Tunguz (Theory Ventures)

AI-Powered Security: Building Agentic Defense Systems for the Enterprise

This article discusses the emerging challenge of securing enterprises where both attackers and defenders operate as autonomous AI agents. Featuring CISO Jonatha

Explore the data →