Technology companies tend to share a distinct financial profile: high gross margins (often 70-80%+ for software specifically, since delivering software to an additional customer costs very little once it's built), significant ongoing R&D investment, and often faster revenue growth rates than more mature sectors. Evaluating a tech company well means understanding which of these traits are healthy norms for the sector, versus genuine red flags.
For subscription-based (SaaS) companies specifically, Net Revenue Retention (NRR) is a particularly important metric — it isolates whether the existing customer base's revenue is growing, shrinking, or flat over time (including upsells, net of churn), separate from new customer acquisition. An NRR above 100% means the existing customer base alone is expanding, even before counting a single new customer — a strong signal of product value and customer satisfaction.
Correct moves you up, wrong moves you down — reach 100 to master this lesson.