Investing Profile

Alex Rosen(3)

VC
Managing Director and Co-Founder at Ridge Ventures
Photo of Alex Rosen, Managing Partner at Ridge Ventures (Formerly known as IDG Ventures USA)
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Networks Alex is a member of
Stanford University Graduate School of Business Network
427 CONNECTIONS
Massachusetts Institute of Technology Network
399 CONNECTIONS
Credit Suisse Network
198 CONNECTIONS
Stanford University Graduate School of Business Network
74 CONNECTIONS
General Atlantic Network
72 CONNECTIONS

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Current Investing Position
Ridge Ventures (Formerly known as IDG Ventures USA) Managing Partner
Investments On Record
66
Current Fund Size
$130M

Alex Rosen's Investments On Record (43)

CompanyStageDateRound SizeTotal Raised
Horizon3.ai
Series EAug 2026$250M
SeedJan 2020$4M
$530M
Co-investors: Ilya Kirnos (SignalFire), Aaron Jacobson (New Enterprise Associates (NEA)), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Kevin Gabura (Carrick Capital Partners), Dorin Baniel (NightDragon)
Besty AI
SeedJun 2026$4M
SeedAug 2024$2M
$6M
Co-investors: David Ambrose (Steadfast Venture Capital), Ravi Belani (Alchemist Accelerator), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Akriti Dokania (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)), Anthony Pompliano, Scot Wingo
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 (Meritech Capital Partners), Mike Ghaffary (Canvas Ventures), Bradley Horowitz (Google Ventures), JP (Jean-Paul) Sanday (Menlo Ventures), Nadav Ben-Chanoch (Pareto Holdings), Jeremy Stoppelman (Yelp.com), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Alex Khor (AfterWork Ventures), Michael Stoppelman (Self-employed), Edward Lando (Biowear), Katelyn Donnelly (Avalanche VC), Kevin Stumpf, Ron Pragides, Tushar Garg, Frederic Kerrest, Ryan Carlson
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 (TeamRankings.com), Jared Friedman (Israel Defense Forces), 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), Itamar Novick (Recursive Ventures), Pete Briger (Fortress Investment Group), Robert Pittman (iHeartMedia), Kim Perell (Unknown Ventures), Steve Drobny (Clocktower Technology Ventures), Jack Abraham (Atomico), Jonah Goodhart (WGI Group), Jonathan Swanson (Thumbtack), Tom Chavez (super{set}), Tod Sacerdoti (Flex Capital, LLC // Turbo Ventures, LLC), Brett Hurt (Austin Ventures), Adam Foroughi, Joel Hornstein, Joe Zawadzki, Eric Chernoff, Russ Fradin, Brian O'Kelley, Russell Fradin, Saran Chari, Nicolas Berggruen, Adam D'Angelo, George Garrick
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 (Arrive), 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