ARR and MRR are fundamental metrics for tracking recurring revenue in subscription businesses. Most startups confuse or conflate these two, leading to inaccurate business assessments.
Pre-seed companies focus on problem validation and early traction signals. Key metrics include:
- Daily/weekly active users
- Week 1 retention rate
- Customer interview feedback
- Initial signups (if applicable)
Seed-stage companies prove repeatable customer acquisition with focus on unit economics:
- Monthly recurring revenue (MRR)
- Customer acquisition cost (CAC)
- Monthly churn rate
- CAC payback period
Series A companies optimize unit economics at increasing scale:
- Paid CAC vs. total CAC
- LTV to CAC ratio (target: 3:1)
- Magic number
- Cohort retention curves
Series B companies expand to adjacent markets while maintaining efficiency:
- Unit economics by customer segment
- CAC and LTV by acquisition channel
- Net revenue retention
- Expansion revenue percentage
Series C+ companies prove they can build a public-scale business:
- Rule of 40 (growth % + margin %)
- Operating leverage
- Market share in served market
- Gross margin trending
The key insight: the metrics that matter change as your business scales. Optimize for your current stage, then focus on the metrics that drive the next stage.