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
Juan Casian
Founder/CEO·Boom AI
PRIMARY INFO
RoleFounder/CEO
Team size3
BatchFall 2025
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
I’m the Co-Founder and CEO of Boom, where we’re building the AI employee layer for e-commerce: virtual agents that help brands close more sales by automating customer interactions. Before this, I dropped out of college to build Atrato (YC W21), one of Latin America’s leading Buy Now Pay Later companies, which I scaled from 0 to ~$20M in annualized revenue before it was acquired. I started as CTO and became CEO, which made learn how to sell, lead, and scale.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
No notable employer or school mentioned in the bio.
CredentialsDropout / Thiel
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
2× YC founderExit mentioned in bio
- W21AtratoActive
- F25Boom AIActive · this entry
COMPANY CONTEXT
Boom AIAI agents that recover lost revenue through real conversations.
