Steven Sinofsky is an angel investor based in Sioux Falls, South Dakota, United States. The known portfolio counts 4 companies: Fieldbook, Sugar, Spreadsheet.com and Sochat.
Is Steven Sinofsky a fit for your startup?
Paste your website. AI checks the fit and scores every other investor too.
Investment focus
Contacts
Steven Sinofsky portfolio companies (4)
- Fieldbook
- Sugar
- Spreadsheet.com
- Sochat
Affiliated funds' portfolios
Advisor at Box, whose known portfolio counts 5 companies
- Mobile Pathways
- Water Mission
- African Community Center for Social Sustainability
- Children's Home Society & Family Services
- U.S. Digital Response
Board Partner at Andreessen Horowitz, whose known portfolio counts 29 companies
- Flora
- Kalshi
- pillar
- Promise
- SuperGaming
- Voyage
- Sage Haven
- Axis
- Nexxa.ai
- Hex Technologies
- Prepared
- Hedra
- and 17 more
Investor Profile
Founders in the listed sectors AI and SaaS, and focus areas Data Analytics, Data Management, Data Visualization and Database will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Pre-Seed and Seed rounds.
The portfolio and focus above give founders context on whether Steven Sinofsky matches their raise.
Colleagues
Showing 20 of 152
Andrew Chen
General Partner
San Francisco, United States
Adrian Fenty
Special Advisor
Washington, United States
Joe Schmidt IV
Partner
San Francisco, United States
Daniel C. Liem
Scout
San Francisco, United States
Martin Casado
General Partner
San Francisco, United States
Zane Lackey
General Partner
New York, United States
David Ulevitch
General Partner
New York, United States
Daouda Leonard
Scout
Los Angeles, United States
Erik Torenberg
General Partner
San Francisco, United States
Jonathan Lai
General Partner
Menlo Park, United States
Fareed Mosavat
Visiting Partner, a16z speedrun
Berkeley, United States
Jeff Jordan
General Partner
San Francisco, United States
Ali Yahya
General Partner
New York, United States
Marc Petit
Scout Investor
Montreal, Canada
Angela Strange
General Partner
San Francisco, United States
Margit Wennmachers
Operating Partner
Jackson, United States
Rubén Domínguez Ibar
Scout
United States
Alexey Moiseenkov
Scout
Palo Alto, United States
Guido Appenzeller
Partner
Menlo Park, United States
Connie Chan
General Partner
San Francisco, United States
Similar investors
Showing 20 of 99
Satya Nadella
Chairman and CEO
Redmond, United States
Steve Anderson
Founder
San Francisco, United States
Pete Soderling
Founder & General Partner
San Francisco, United States
Guy Fighel
angel investor and operator angel
San Francisco, United States
Sarah Smith
Founder and Managing Partner
Menlo Park, United States
Kevin Scott
angel investor
United Kingdom
Dave Carlson
angel investor and operator angel
Englewood, United States
Satya Ganni
angel investor and operator angel
Austin, United States
Stephen Garden
angel investor
Los Angeles, United States
Jonathan Heiliger
General Partner
Aspen, United States
Adam Smith
angel investor and operator angel
San Francisco, United States
Sid Banerjee
angel investor and operator angel
Washington, United States
Sam Lessin
Partner
Menlo Park, United States
Steve Shi
angel investor
Shanghai, China
David Yee
angel investor
Boston, United States
Steve Schoettler
angel investor and operator angel
Menlo Park, United States
Mike Davidson
angel investor
Seattle, United States
Andrew Whigham
angel investor
Seattle, United States
Eric Helbig
angel investor
Redmond, United States
Aliaksandr Hudzilin
angel investor and operator angel
San Francisco, United States
Frequently asked questions
Who is Steven Sinofsky?
Steven Sinofsky is an angel investor based in Sioux Falls, South Dakota, United States with 4 known investments on file, among them Fieldbook, Sugar and Spreadsheet.com. The sections above list the sectors, stages and firms attached to that record.
What does Steven Sinofsky invest in?
Listed sectors include AI and SaaS; listed focus areas include Data Analytics, Data Management, Data Visualization and Database. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Steven Sinofsky invest at?
The known deals of Steven Sinofsky include Pre-Seed and Seed rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Steven Sinofsky listed at?
Steven Sinofsky is listed as Board Partner at Andreessen Horowitz. 152 other people in the database share a firm with Steven Sinofsky.
How do I contact Steven Sinofsky?
An email address, a phone number and a LinkedIn page are on file for Steven Sinofsky. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
Skip the browsing. Let AI find your ideal investors in one minute.
Paste your startup website and AI picks your best-fit investors out of 135,000+ profiles.
Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal