Business Metrics — AARRR

Stage Definition
Acquisition Target B2B professional service founders with 5–50 employees in US, UAE, Canada, Australia, UK
Activation First successful end-to-end call — prospect calls, Aria qualifies, booking confirmed, team briefed — in under 90 seconds
Retention Businesses that receive at least one fully briefed lead in week one continue using the system through month two
Revenue Infrastructure cost at SMB scale is effectively zero on free tiers. Monetised as ANR service deployment at $3,000–$8,000 per client
Referral A founder who sees a call handled at 11pm with a brief in their inbox by midnight has an immediate story to share

User Experience Metrics — HEART

Metric Target
Happiness Prospect satisfaction — natural conversation, no friction, booking confirmed before call ends
Engagement Calls completed end-to-end without dropout
Adoption % of inbound calls handled by Aria vs human
Retention Monthly active deployments across client accounts
Task Success Call to booking consistently under 90 seconds

AI Performance Metrics

Metric Target
Call Answer Latency < 3 seconds
Call to Booking < 90 seconds median
Qualification Accuracy Correct routing of fit vs not-fit callers
Tool Call Success Rate > 99% bookAppointment success
Transcript Accuracy Deepgram Nova 2 with smart formatting

North Star Metric

Calls Answered × Bookings Confirmed

The system succeeds when every inbound call results in either a confirmed meeting or a qualified disqualification — with zero calls going to voicemail.