Founder Directory
Built by Keitoto
Founders4
Known for these resultsRole50%Role is parsed from founder titles in yc.db. Known for 50% 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-company75%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 75% of these rows have at least one match.School75%School is matched from bios, case-sensitive for acronyms. 75% of these rows have at least one match.
- Merlin Kafka@merlinkafkaFounder/CEO · RexS26B2B · San Francisco
- Ayantika DeyFounder/CTO · Merlin AIS24B2B · Los Angeles
- Kumar SiddharthaFounder · Merlin AIS24B2B · Los Angeles
- Sneha KumariFounder · Merlin AIS24B2B · Los Angeles
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Merlin KafkaRexFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/merlinkafkaAyantika DeyMerlin AIFounder/CTOSummer 2024B2BLos Angeles, United States19—Kumar SiddharthaMerlin AIFounderSummer 2024B2BLos Angeles, United States19—Sneha KumariMerlin AIFounderSummer 2024B2BLos Angeles, United States19—
Showing 1–4 of 4 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
