Founder Directory
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Founders7
Known for these resultsRole43%Role is parsed from founder titles in yc.db. Known for 43% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio86%Bio coverage: 86% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company0%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 0% of these rows have at least one match.School29%School is matched from bios, case-sensitive for acronyms. 29% of these rows have at least one match.
- Jose ToscanoFounder/CTO · Boom AIF25B2B · San Francisco
- Juan CasianFounder/CEO · Boom AIF25B2B · San Francisco
- Sergio GarciaFounder · Boom AIF25B2B · San Francisco
- Sebastian Crossa@sebcrossaFounder · LLM StatsS25B2B · New York
- Alejandro ChavezFounder · AtratoW21Fintech · Mexico City
- Juan CasianEx-CEO & Co-founder (Previously CTO) · AtratoW21Fintech · Mexico City
- Roger Rea@rogereurFounder · AtratoW21Fintech · Mexico City
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Jose ToscanoBoom AIFounder/CTOFall 2025B2BSan Francisco, United States3—Juan CasianBoom AI2× YCFounder/CEOFall 2025B2BSan Francisco, United States3—Sergio GarciaBoom AIFounderFall 2025B2BSan Francisco, United States3—Sebastian CrossaLLM StatsFounderSummer 2025B2BNew York, United States2https://x.com/sebcrossaAlejandro ChavezAtratoFounderWinter 2021FintechMexico City, Mexico80—Juan CasianAtrato2× YCEx-CEO & Co-founder (Previously CTO)Winter 2021FintechMexico City, Mexico80—Roger ReaAtratoFounderWinter 2021FintechMexico City, Mexico80https://x.com/rogereur
Showing 1–7 of 7 founders
Jose Toscano
Founder/CTO·Boom AI
PRIMARY INFO
RoleFounder/CTO
Team size3
BatchFall 2025
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
I’m the Co-Founder and CTO of Boom, where I lead our AI efforts and tackle the hardest technical problems behind the product. Before Boom, I was the first engineer at Atrato (YC W21), helping scale a BNPL platform that processed millions in loan applications each month. I hold a double major in Mechatronics (ITESM) and Automation (Hochschule Esslingen). I focus on practical AI that drives business results. I also do hackathons for fun and have won six recently. Outside work I code side projects
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Boom AIAI agents that recover lost revenue through real conversations.
