Business Metrics — AARRR

Stage Definition
Acquisition Target B2B founders and solo sales operators at SMBs with 5–50 employees running inbound lead operations
Activation First successful lead processed end-to-end — form to scored result to email sent — within 90 seconds
Retention Founders who receive at least one HIGH priority Slack notification in week one continue using the system through week four at significantly higher rates. The notification itself is the retention hook
Revenue Cost per lead processed under $0.02 at current Gemini API pricing. At 200 leads/month, total infrastructure cost remains zero on free tiers
Referral A founder who sees a HIGH priority lead handled at 11pm with no intervention has an immediate story to tell

User Experience Metrics — HEART

Metric Target
Happiness Founder satisfaction score ≥ 4.5/5
Engagement Average leads processed per week; Slack notifications opened within 5 minutes
Adoption % of inbound leads processed through SmartForm vs manual handling
Retention Founders active across 2+ consecutive months
Task Success Response time from form submission to email delivery consistently under 90 seconds

AI Performance Metrics

Metric Target
Output Reliability > 99% valid JSON response rate
Hallucination Rate < 2%
Consistency > 95% reproducibility for identical inputs
Latency 45–90 seconds end-to-end including email delivery
Cost per lead < $0.02 at current API pricing

North Star Metric

Response Speed × Lead Quality Score

The system succeeds when high-intent leads are responded to faster AND founders spend less time on low-intent ones. Both must improve simultaneously. Optimising one at the expense of the other is a failure state.