PE-backed HVAC/plumbing platform collapses 9 call centers into one Avoca AI front office and lifts pilot brand 20% YoY
Granite Comfort (pilot brand Yost & Campbell) · Multi-state US (TX, PA, IL, GA, NC, NY) ·
What they did
Granite Comfort rebuilt customer-facing ops around Avoca across nine brands: AI answers every call, Coach manages quality from one seat, and Human-in-the-Loop replaced nine after-hours vendors with live 24/7 booking. The pilot brand Yost & Campbell grew revenue 20% YoY mainly from previously unanswered calls rather than new ad spend.
Reported results
- +20% YoY revenue at pilot brand Yost & Campbell
- Over 50% of bookable calls handled end-to-end by AI
- 9 contact centers consolidated to 1; 9 after-hours vendors reduced to 0
Tools
Avoca Responder, Avoca Coach, Avoca Human-in-the-Loop
Cost
Not disclosed
Source
Avoca AI: https://www.avoca.ai/customers/granite-comfort
Vendor case study (results reported by the vendor). Source checked 2026-11-03. Results are as reported by the source, not independently audited.
Try it yourself: starter prompt
Our suggested prompt for an AI assistant (ChatGPT, Claude, Grok or your phone-agent tool). It is not from the source.
You answer first-ring for a multi-brand HVAC and plumbing company. Book live after hours when capacity allows, keep each brand's identity, and hand full context to a human CSR when the caller opts out of AI.