Investing Profile

Alex Rosen(3)

Managing Director and Co-Founder at Ridge Ventures

Your Intro Paths to Alex Rosen

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Networks Alex 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

General Atlantic Network

91 CONNECTIONS

Stanford University Graduate School of Business Network

88 CONNECTIONS

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Current Investing Position

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

Investments On Record

Current Fund Size

$130M

Alex 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), Alexander 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: David Ambrose (Steadfast Venture Capital), Ravi Belani (Alchemist Accelerator), Akriti Dokania (Ridge Ventures (Formerly known as IDG Ventures USA)), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Matthew Ziskie (Bungalow Capital)
ReFiBuy	SeedMay 2026$15M	$17M
Co-investors: Matt Nichols (Commerce Ventures), Bob Hower (Advanced Technology Ventures), Alexander 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), Alexander 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), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Andrew Jones
OfferFit	Series BNov 2023$25M	$39M
Co-investors: Alex Clayton (Spark Capital), Mike Ghaffary (Canvas Ventures), Bradley Horowitz (Google Ventures), JP (Jean-Paul) Sanday (Menlo Ventures), Nadav Ben-Chanoch (Pareto Holdings), Alexander 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: Paul Levine (Sapphire Ventures), Chris Scoggins (SignalFire), Scott Faber (NFX), Chris Farmer (SignalFire), Fabrice Grinda (FJ Labs), Jeff Epstein (Bessemer Venture Partners), Peter Thiel (Founders Fund), Cathy Gao (Sapphire Ventures), 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), Jonathan Abrams (8-Bit Capital), Adrian Aoun (500 Startups Korea), Naval Ravikant (Sm4rt Predictive Systems), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Jonathan Sands (Artist Capital), Shruti Gandhi (Array Ventures), Aniq Rahman (Vast Ventures), Will Harbin (KIXEYE), 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.), Brett Hurt (Austin Ventures), Itamar Novick (Recursive Ventures), Brian O'Kelley, Adam Foroughi, Russ Fradin, Nicolas Berggruen, Russell Fradin, Eric Chernoff, Saran Chari, Joe Zawadzki, Adam D'Angelo
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), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Marc Ladin (PVCP), Josef Feldman (Tectonic Capital)

Alex Rosen's Experience

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

Board Observer OfferFit by BrazePresent

Managing Partner Ridge VenturesPresent

Analyst Credit Suisse First BostonPresent

Board Member Chubbies ShortsPresent

Seed Investor MaintainXPresent

Board Observer OnticPresent

Board Observer OfferFitPresent

Board Member MindMeldPresent

Investor and Board Observer FastlyPresent

Investor BrazePresent

Board Member WorkTango Inc.Present

Board Member SafeGraphPresent

Managing Partner and Co-Founder Ridge VenturesPresent

Board Member Outlier AIPresent

Board Member Krux DigitalPresent

Seed Investor Horizon3.aiPresent

Investor ThirdLovePresent

Junior Associate General AtlanticPresent

Board Member SmartlingPresent

Board Member MintedPresent

Board Member MindMeld, IncPresent

Board Member VidiblePresent

Board Member KazooPresent

GSB Trust Board Member. Chair, Venture Fund Group Stanford University Graduate School of BusinessPresent

Board Member UpLift Inc.Present

General Partner Sprout Group1996 - 2003

Junior Associate General Atlantic Partners1993 - 1994

Analyst Credit Suisse1990 - 1993

Alex 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 Alex Rosen

Scouts & Angels Affiliated With Alex Rosen