Callbook AI

<!-- hacklab:yc-profile -- YC company profile AI collections agency for late stage portfolios Callbook AI is a collections agency operated by AI. We collect late stage portfolio…

Website

About Callbook AI

YC company profile

AI collections agency for late stage portfolios

Callbook AI is a collections agency operated by AI. We collect late stage portfolios by finding, contacting and negotiating with borrowers.

YC batch: Summer 2026
Founded: 2025
Team size: 7
Location: San Francisco
Country: US
Status: Active
Industry: B2B
Stage: Early
Tags: AI
YC partner: Jon Xu

Founders

Diego Avellaneda — Founder/CEO

CEO at Callbook AI. Applied ML researcher with two peer-reviewed publications on deep learning and embedded systems (TinyML on-device deep learning for indoor tracking; low-cost embedded sensing, Elsevier). Master's in IoT applying TinyML to real-time truck telemetry 6+ years in embedded ML. Former Senior Software Engineer at CI&T, where he built Audi's e-commerce car-purchasing platform. Second-time founder

LinkedIn · X

Daniel Martinez — Founder & Product

CTO at Callbook AI. CPO at Treble (YC S19). Leading B2B products for 5+ years.