SaaS, Software & Marketplaces

Learning objectives

By the end you can:

1. Explain the subscription timing inversion from first principles: why a SaaS company that acquires customers profitably must report losses while it grows fast (CAC expensed today, revenue recognized over years), demonstrate it with a cohort table, and separate the profitable install base from the growth spend that hides it.
2. Compute the full SaaS KPI panel from raw data: ARR/MRR and the ARR bridge, NRR/NDR and GRR, logo vs gross revenue churn, CAC payback (gross-margin-adjusted), LTV/CAC, magic number, Rule of 40, gross margin, S&M and R&D intensity. Classify each against its healthy/stress threshold (NRR ≥120% great / <90% leaky; CAC payback <12 months great; LTV/CAC >3×; magic number >0.75; Rule of 40 ≥40; gross margin 70–80%+).
3. Audit ARR quality: rank recurring revenue on the quality hierarchy (contracted multi-year → annual prepaid → monthly auto-renew → annualized usage run-rate → rebadged services), and cross-examine any management ARR claim against the contract-anchored evidence: billings, deferred revenue, RPO and cRPO.
4. Value software with discipline: use EV/Sales and EV/ARR growth-adjusted, build the margin-maturity bridge (today's revenue → steady-state FCF margin → mature multiple → discount back), and reverse today's multiple into the growth-and-margin path it implies.
5. Explain what a marketplace actually sells, which is liquidity, and compute its panel: GMV and its decomposition (buyers × frequency × AOV), take rate and net revenue (with the agent-vs-principal accounting that separates them), match rate/time-to-fill, active buyers/sellers, cohort GMV retention, and contribution margin per transaction.
6. Diagnose the three marketplace killers: disintermediation/leakage, multi-homing, and take-rate compression. Name the category features that predict each, and run the subsidy test that separates real GMV from bought GMV.
7. Run both red-flag panels on live filings: for SaaS, NRR below 100%, billings/cRPO decelerating below reported ARR growth, CAC payback lengthening as growth slows, discount-bought ARR, Rule of 40 below 20; for marketplaces, leakage signatures, negative contribution margin defended as "investment," take-rate erosion, incentive-dependent cohorts.
8. Deliver the module gate: one full SaaS workup and one full marketplace workup (timed, from data packs) plus the two-company mini-project, each graded against the keys and rubric below.

Prerequisites & connections

Builds on. M4.01 (business model anatomy) named subscription and marketplace/take-rate as two of the six revenue models; the week ahead industrializes both. M4.02 (unit economics) built CAC, LTV, payback, contribution margin, and cohort thinking from scratch. Here those tools stop being generic and acquire sector-standard definitions, thresholds, and filing locations. M1.06 gave you the 5-step revenue model (ASC 606 / IFRS 15 / Ind AS 115), deferred revenue and contract assets, and the gross-vs-net (principal-vs-agent) judgment. That single accounting judgment is why GMV is not revenue and why marketplace EV/Sales comparisons go wrong. M1.09's stock-based compensation machinery returns as the central honesty question in SaaS free cash flow. From Phase 2: FCF conversion and the CFO-vs-earnings reflexes (M2.04), and the shenanigans instinct (M2.06), because improper capitalization and metric games have SaaS-specific costumes. From Phase 3: relative valuation discipline (M3.06: a multiple is a compressed DCF), reverse-DCF (M3.05), and the Dark Side toolkit for high-growth money-losers (M3.10), applied here at sector scale. From Phase 4: network effects and switching costs (M4.04) and the market-share-stability test (M4.05) are the moat lenses that decide whether a marketplace's liquidity is defensible.

Feeds into. M5.05 (consumer, retail & e-commerce) reuses GMV, cohort, and CM1/CM2/CM3 machinery for inventory-led e-commerce, and the 1P/3P distinction you learn here is the bridge. Phase 8's rapid teardown uses these two panels as the "software" and "platform" branches of the sector triage: when the two-minute read says recurring software revenue or take-rate business, this is the checklist you run. The valuation sandbox's reverse-multiple challenges draw their SaaS cases from here. Competency C6 continues its certification: after this module you can be handed any software or platform company, India or US, and know which numbers to demand.

4.1 Two playbooks, one physics

Write a piece of software once and the second copy costs nothing. Near-zero marginal cost is the physics under both playbooks here, and it produces the two best business models yet discovered plus their characteristic pathologies.