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
423 CONNECTIONS
Massachusetts Institute of Technology Network
392 CONNECTIONS
Credit Suisse Network
196 CONNECTIONS
General Atlantic Network
72 CONNECTIONS
Stanford University Graduate School of Business Network
71 CONNECTIONS

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Current Investing Position
Ridge Ventures (Formerly known as IDG Ventures USA) Managing Partner
Investments On Record
64
Current Fund Size
$130M

Alex Rosen's Investments On Record (43)

CompanyStageDateRound SizeTotal Raised
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, 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
Besty AI
SeedAug 2024$2M
$6M
Co-investors: Akriti Dokania (Ridge Ventures (Formerly known as IDG Ventures USA)), Matthew Ziskie (Bungalow Capital), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), David Ambrose (Steadfast Venture Capital), Ravi Belani (Extensity (IPO'd, then acq by Geac))
OfferFit
Series BNov 2023$25M
$39M
Co-investors: Bradley Horowitz (Google Ventures), Alex Clayton (Meritech Capital Partners), Mike Ghaffary (Canvas Ventures), JP (Jean-Paul) Sanday (Menlo Ventures), Nadav Ben-Chanoch (Pareto Holdings), Katelyn Donnelly (Avalanche VC), 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), Tushar Garg, Frederic Kerrest, Ryan Carlson, Kevin Stumpf, Ron Pragides
SafeGraph
Series BMar 2021$45M
Series AApr 2017$16M
$61M
Co-investors: Peter Thiel (Founders Fund), Cathy Gao (Sapphire Ventures), Scott Faber (NFX), Chris Farmer (SignalFire), Fabrice Grinda (FJ Labs), Paul Levine (Sapphire Ventures), Jeff Epstein (Bessemer Venture Partners), Chris Scoggins (SignalFire), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Itamar Novick (Recursive Ventures (ICCA Labs)), Jonathan Abrams (8-Bit Capital), 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), 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 (TeamRankings.com), Jared Friedman (Israel Defense Forces), Brad Garlinghouse (Ripple VC), Matthew Cowan (Next47), Doug Chertok (Vast Ventures), Julia Popowitz (Broadway Angels), Naval Ravikant (Sm4rt Predictive Systems), Adrian Aoun, Russell Fradin, Adam Foroughi, George Garrick, Russ Fradin, Brian O'Kelley, Adam D'Angelo, Saran Chari, Eric Chernoff, Joe Zawadzki, Joel Hornstein, Nicolas Berggruen
Horizon3.ai
SeedJan 2020$4M
$280M
Co-investors: Ilya Kirnos (SignalFire), Aaron Jacobson (New Enterprise Associates (NEA)), Kevin Gabura (Carrick Capital Partners), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Dorin Baniel (NightDragon)
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