Founder Directory
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Founders7
Known for these resultsRole57%Role is parsed from founder titles in yc.db. Known for 57% 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.Bio100%Bio coverage: 100% 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-company43%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 43% 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.
- Lewis BlackwoodFounder/CTO · RexS26B2B · San Francisco
- Merlin Kafka@merlinkafkaFounder/CEO · RexS26B2B · San Francisco
- Eshani MehtaFounder/CEO · LumariX25B2B · San Francisco
- Sam LambaFounder/CTO · LumariX25B2B · San Francisco
- Ahmad RoumieFounder · rex.fitW23Consumer · San Francisco
- Emmanuel Rex Rodriguez@rex_rodrFounder · Express BuildingS22Real Estate and Construction · Singapore
- Adam Montgomery@montasaurus_rexFounder · NectoW18Consumer · New York
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Lewis BlackwoodRexFounder/CTOSummer 2026B2BSan Francisco, United States2—Merlin KafkaRexFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/merlinkafkaEshani MehtaLumariFounder/CEOSpring 2025B2BSan Francisco, United States5—Sam LambaLumariFounder/CTOSpring 2025B2BSan Francisco, United States5—Ahmad Roumierex.fitFounderWinter 2023ConsumerSan Francisco, United States2—Emmanuel Rex RodriguezExpress BuildingFounderSummer 2022Real Estate and ConstructionSingapore, Singapore14https://x.com/rex_rodrAdam MontgomeryNectoFounderWinter 2018ConsumerNew York, United States4https://x.com/montasaurus_rex
Showing 1–7 of 7 founders
Merlin Kafka
Founder/CEO·Rex
PRIMARY INFO
RoleFounder/CEO
Team size2
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Merlin is the Founder and CEO of Rex, the AI partner for enterprise order-to-cash. He spent 4 years as CPO at Sequence (a16z-backed), an order-to-cash platform where he grew the company to millions in ARR and hundreds of customers. He has deep domain expertise in order to cash and accounts receivable workflows -- the exact space Rex is transforming with AI. Previously a PM at Tessian (Sequoia-backed, acquired in 2023). Studied Industrial Engineering in Cambridge and Product Design in Glasgow.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineDesignerKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
RexAI-native BPO for enterprise order-to-cash
Co-foundersLewis Blackwood
