JR

Joseph Reth

CEO and Cofounder at Stealth Biotech. Currently working on foundational scientific superintelligence.

San Francisco, California

Angel
Founder
CEO

Invests in

Stages:

Seed
Pre-seed

Locations:

  • Min Investment:

    $25,000.00

  • Max Investment:

    $250,000.00

  • Target Investment:

    $100,000.00

Skills

Data Analysis
Machine Learning
Natural Language Processing (NLP)

Education

Lists including Joseph

AH
AE
AF
AJ

Based in SF

3077 people

AM
AT
AS
AR

All Seed Investors

19691 people

AT
AE
AE
AL

All Pre-Seed Investors

7972 people

PS
PS
PC
PM

Pre-seed Investors in San Francisco

993 people

Investments

Scharper AI

Seed

Total Funding:

Imperial Technologies

Seed

Total Funding:

RethX

Seed

Total Funding: $300K

Work Experience

Stealth Biotech

2025

  • Co-Founder

    2025

    foundational scientific superintelligence

Joseph Reth

2019

  • Angel Investor

    2019

    Focus Areas: Deep Tech; Enterprise Infrastructure; Digital Health; US National Security & Defense; Life Sciences. Primary investment focus in North America and Asia-Pacific markets. I do not consider unsolicited investment opportunities via LinkedIn messages. Please respect my inbox. contact@josephreth.com

US
United States Department of Defense

2024 - 2025

  • Contractor

    2024 - 2025

LR
Lossless Research

2022 - 2025

  • CEO

    2022 - 2025

    www.lossless.tech

SU
Stanford University

2023 - 2023

  • Stanford FLI Research

    2023 - 2023

    Stanford FLI Research Program focused on empowering first-generation and/or limited-income (FLI) Stanford students aspiring to become tech founders. Served as an invited founder to mentor Stanford students and share entrepreneurial insights from my experience as a FLI tech founder.

R
RethDigital

2019 - 2022

  • Founder & CEO

    2019 - 2022

    RethDigital was an award-winning digital agency. Bootstrapped to 7-figure ARR. Exited.