YC Summer 2026 (S26) founder

Diego Avellaneda

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

Callbook AIb2bai1 public signals

Company

Diego Avellaneda 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

    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