We sell an online platform for studying for the ISA Certified Arborist exam. It includes video lessons, an ai feature, flashcards, glossary and more!

Audn automates external black-box penetration testing for AI companies and enterprises. Existing cyber models are trained mostly on open-source data, while the highest-risk vulnerabilities now sit in closed-source production systems like binaries, public endpoints, network misconfigurations, AI behaviours. We have early pentester usage and a paid pilot with a YC S25 voice AI startup that generated revenue tied to a retailer contract.

Helping Airbnb hosts earn more: measure visibility, run experiments, and automate enquiry replies that convert.

Non funded, 0 to $2m ARR (soon), quickest ever?