Fundraising Fox
Find your path to Brian
10,162 people in our graph share verified history with Brian — schools, employers, funds. One of them is your warm intro.
About
Brian Joseff is Founder and CEO of River (YC F26). He previously founded Bedrock (2020-2023), worked as a neuroscience researcher at Stanford School of Medicine, and was on the founding team of Progressly (acquired by Box). He holds a BA in Economics from Dartmouth.
Founder/CEO at RiverYC F26
Intro paths
Brian went through Y Combinator (Fall 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Pete Koomen, General Partner at Y Combinator — the partner who ran River's batch and knows the company first-hand. YC profile ↗
In turn, Brian can intro founders to River's investors below.
River's investors · 3
Co-founders at River
Experience
- RiverCo-Foundercurrent2025 — present
- Stanford University School of MedicineResearchercurrent2024 — present
- Department of Psychiatry and Behavioral Sciences, Stanford University School of MedicineResearchercurrent2024 — present
- BedrockFounder, CEO2020 — 2023
- Family Office ConsultingConsultant2017 — 2020
- Oxnard GuerrerosStriker2018 — 2019
- Progressly (acquired by Box)Head of Product, Founding Team2014 — 2017
- Drawbridge, Inc.Intern2012 — 2013
- Dos CompostFounder2012
- B1 FitnessFounder2010
Frequently asked questions
- Who is Brian Joseff?
- Brian Joseff is Founder and CEO of River (YC F26). He previously founded Bedrock (2020-2023), worked as a neuroscience researcher at Stanford School of Medicine, and was on the founding team of Progressly (acquired by Box). He holds a BA in Economics from Dartmouth.
- Where does Brian Joseff work?
- Brian Joseff is Founder/CEO of River.
- What companies did Brian Joseff found?
- Brian Joseff founded River.
- Where did Brian Joseff go to school?
- Brian Joseff studied at Stanford University School of Medicine (Doctor of Medicine); Dartmouth College (Economics); Bryn Mawr College (Postbaccalaureate Premedical Program).
Founder mafias
Y Combinator mafia10,444
Also came through, then founded or led a company.
Same school
Also attended Stanford University School of Medicine158
+ 152 more
Also attended Dartmouth College670
+ 664 more
Also attended Bryn Mawr College17
+ 11 more
