Investing Profile

Alexander Rosen(3)

InvestorVCFounder

Managing Partner and Co-Founder at Managing Partner and Co-Founder

ridge.vcSan Francisco, California

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Networks Alexander is a member of

Massachusetts Institute of Technology Network

529 CONNECTIONS

Stanford University Graduate School of Business Network

510 CONNECTIONS

Credit Suisse Network

281 CONNECTIONS

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Current Investing Position

Ridge Ventures (Formerly known as IDG Ventures USA) Managing Partner

Investment Range

$1M - $7.0M

Sweet Spot

$4.0M

Investments On Record

Current Fund Size

$130M

Alexander Rosen's Investments On Record (43)

Company	StageDateRound Size	Total Raised
Horizon3.ai	Series EAug 2026$250M SeedJan 2020$4M	$530M
Co-investors: Ilya Kirnos (SignalFire), Aaron Jacobson (New Enterprise Associates (NEA)), Dave DeWalt (NightDragon), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Kevin Gabura (Craft Ventures), Dorin Baniel (NightDragon)
Besty AI	SeedJun 2026$4M SeedAug 2024$2M	$6M
Co-investors: Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Ravi Belani (Alchemist Accelerator), Akriti Dokania (Ridge Ventures (Formerly known as IDG Ventures USA)), Matthew Ziskie (Bungalow Capital), David Ambrose (Steadfast Venture Capital)
ReFiBuy	SeedMay 2026$15M	$17M
Co-investors: Matt Nichols (Commerce Ventures), Bob Hower (Advanced Technology Ventures), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Scot Wingo (Triangle Tweener Fund), Anthony Pompliano
GoodDay Software	Series UnknownJan 2026$7M	$7M
Co-investors: Amish Jani (FirstMark Capital), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA))
Flip CX	Series AJan 2026$20M	$29M
Co-investors: Kevin O'Connor (ScOp Venture Capital), Eric Wiesen (Bullpen Capital), Aaron Schildkrout (Addition), Michael Cardamone (Forum Ventures), Mike Smerklo (Next Coast Ventures), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Andrew Jones
OfferFit	Series BNov 2023$25M	$39M
Co-investors: Mike Ghaffary (Canvas Ventures), Bradley Horowitz (Google Ventures), Alex Clayton (Spark Capital), JP (Jean-Paul) Sanday (Menlo Ventures), Nadav Ben-Chanoch (Pareto Holdings), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Alex Khor (AfterWork Ventures), Tushar Garg (Flyhomes), Michael Stoppelman (Self-employed), Edward Lando (Biowear), Katelyn Donnelly (Avalanche VC), Jeremy Stoppelman (Yelp.com), Frederic Kerrest, Ryan Carlson, Kevin Stumpf, Ron Pragides
SafeGraph	Series BMar 2021$45M Series AApr 2017$16M	$61M
Co-investors: Chris Farmer (SignalFire), Fabrice Grinda (FJ Labs), Cathy Gao (Sapphire Ventures), Peter Thiel (Founders Fund), Jeff Epstein (Bessemer Venture Partners), Paul Levine (Sapphire Ventures), Scott Faber (NFX), Chris Scoggins (SignalFire), Adrian Aoun (500 Startups Korea), Naval Ravikant (Sm4rt Predictive Systems), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Itamar Novick (Recursive Ventures), Jonathan Abrams (8-Bit Capital), Pete Briger (Fortress Investment Group), Robert Pittman (iHeartMedia), Kim Perell (Unknown Ventures), Steve Drobny (Clocktower Group), Jack Abraham (Atomico), Jonah Goodhart (WGI Group), Jonathan Swanson (Thumbtack), Tom Chavez (super{set}), Joel Hornstein (3i Group), Tod Sacerdoti (Flex Capital, LLC // Turbo Ventures, LLC), George Garrick (G2 Consultants, Inc.), Jonathan Sands (Artist Capital), Brett Hurt (Austin Ventures), Shruti Gandhi (Array Ventures), Aniq Rahman (Vast Ventures), Will Harbin (KIXEYE), Ethan Beard (Piazza Venture Labs), Mike Greenfield (CILA THERAPEUTICS), Jared Friedman (Y Combinator), Brad Garlinghouse (Ripple VC), Matthew Cowan (Next47), Doug Chertok (Vast Ventures), Julia Popowitz (Broadway Angels), Russell Fradin, Adam Foroughi, Nicolas Berggruen, Brian O'Kelley, Eric Chernoff, Russ Fradin, Adam D'Angelo, Saran Chari, Joe Zawadzki
Outlier	Series BJan 2020$22M Series AJul 2018$6M	$78M
Co-investors: John Lyman (GV (Google Ventures)), Leo Polovets (Susa Ventures), Neil Sirni (Proximity Ventures), Stephen Francis (MONTAJ), Brad Greenwald (Hilltop Venture Partners), Mike Smerklo (Next Coast Ventures), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Marc Ladin (PVCP), Josef Feldman (Tectonic Capital)

most interested in

I'm looking to invest in founder-led Series A companies with early revenue, primarily serving enterprises. Currently focus on data services, cloud infrastructure, Consumerization of IT, SaaS applications, martech, and select e-commerce.

not interested in

I'm less excited about hardware, non-Series A stage

Alexander Rosen's Experience

Managing Director and Co-Founder Ridge Ventures (Formerly known as IDG Ventures USA)2006 - Present

Analyst Credit SuissePresent

Junior Associate General Atlantic PartnersPresent

General Partner Sprout Group1996 - 2003

Alexander Rosen's Education

Stanford University Graduate School of Business MBA

Massachusetts Institute of Technology Bachelor of Science (BS) Economics, Electrical Engineering

Investors who invest with Alexander Rosen

Scouts & Angels Affiliated With Alexander Rosen