Sales & marketing

Userfox

Website

Overview

userfox is a SaaS product that helps companies improve user retention through welcome, inactivity and custom trigger based emails. We're building a company. Not a product, and certainly not a feature. We believe that making this clear matters. It sets expectations to ourselves and to our customers. We're based in sunny San Francisco, California.

Company description As recorded 2026-11-08

Founders & team

Cesar Alaniz

Founder/CTO

I'm head of Compliance Engineering and Technology at Block. A multi-disciplinary group of Machine Learning Modelers, Machine Learning Engineers, Data Scientists, Data Analysts and Software Engineers working on the toughest Compliance problems at Block across both our Square and Cash business units. Previously, a Director of Engineering at Weebly and Founder of YC S11 company Userfox.

Founder profile As recorded 2026-09-15
2team members reported
Source-reported As recorded 2026-09-15

News & product activity

Sources & observations

500 Global · Y Combinator

Profile depthverified profile
Website observationwebsite unreachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationdescriptive evidenceclassified market and modelsourced people