YC Summer 2026 (S26) founder

Daniel Martinez

Founder of Callbook AI, AI collections agency for late stage portfolios

Callbook AIb2bai1 public signals

Company

Daniel Martinez is listed as a founder of Callbook AI. Callbook AI is a collections agency operated by AI. We collect late stage portfolios by finding, contacting and negotiating with borrowers.

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. X

    This is crazy 🫠!!!

    This is crazy 🫠!!!