YC Summer 2026 (S26) company

Callbook AI

AI collections agency for late stage portfolios

b2baiservices3 public signals

About Callbook AI

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

Public traction evidence

Each signal links to the public source used for attribution.

  1. X

    The best people build together.

    The best people build together. Now Daniel and I get to be part of one in SF. We’re hosting a small Fintech GTM Hackathon at @frontiertower build & pitch in one night. If you’re in the Bay Area, you should come: https://t.co/pDQLpBQy1P

  2. YouTube

    Callbook AI (YC S26) : The AI Debt Collection Company Breaking Records

    Callbook (YC S26) is the AI collections agency that finds hard-to-reach borrowers, understands their situation, and negotiates with them to recover money lenders would otherwise write off. Callbook runs collections at massive scale for banks, fintechs, BNPL providers, and other...

  3. X

    This is crazy 🫠!!!

    This is crazy 🫠!!!