Investing Profile

Alex Rosen(3)

Managing Director and Co-Founder at Ridge Ventures

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Networks Alex is a member of

Massachusetts Institute of Technology Network

628 CONNECTIONS

Stanford University Graduate School of Business Network

580 CONNECTIONS

Stanford University Network

502 CONNECTIONS

Credit Suisse Network

317 CONNECTIONS

Stanford University Graduate School of Business Network

105 CONNECTIONS

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Current Investing Position

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

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: Aaron Jacobson (New Enterprise Associates (NEA)), Ilya Kirnos (SignalFire), 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: Ravi Belani (Alchemist Accelerator), David Ambrose (Steadfast Venture Capital), 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), Andrew Jones (Attentive), 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))
OfferFit	Series BNov 2023$25M	$39M
Co-investors: Mike Ghaffary (Canvas Ventures), Alex Clayton (Spark Capital), Bradley Horowitz (Google Ventures), JP (Jean-Paul) Sanday (Menlo Ventures), Edward Lando (Pareto Holdings), 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), Ron Pragides (GTMFund), Katelyn Donnelly (Avalanche VC), Jeremy Stoppelman (Yelp.com), Frederic Kerrest, Ryan Carlson, Kevin Stumpf
SafeGraph	Series BMar 2021$45M Series AApr 2017$16M	$61M
Co-investors: Chris Farmer (SignalFire), Paul Levine (Sapphire Ventures), Chris Scoggins (SignalFire), Scott Faber (NFX), Fabrice Grinda (FJ Labs), Jeff Epstein (Bessemer Venture Partners), Cathy Gao (Sapphire Ventures), Ethan Beard (Piazza Venture Labs), Eric Chernoff (Dagster Labs), Mike Greenfield (Bonafide), Jared Friedman (Y Combinator), Brad Garlinghouse (SVG Ventures-THRIVE), Russell Fradin (Dynamic Signal), 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), Peter Thiel (The Founders Fund), Alexander Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Brett Hurt (Austin Ventures), Shruti Gandhi (Array Ventures), Aniq Rahman (Vast Ventures), Will Harbin (Rule 1 Ventures), 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), Itamar Novick (Recursive Ventures), Pete Briger (Fortress Investment Group), Robert Pittman (iHeartMedia), Kim Perell (100.co), Steve Drobny (Clocktower Group), Adam D'Angelo, Brian O'Kelley, Adam Foroughi, Russ Fradin, Nicolas Berggruen, 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), Seetharam Venkatesh (Capital One 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 (VoicePunch VC), Josef Feldman (Tectonic Capital), Julia Stiglitz (GSV Ventures)

Alex Rosen's Experience

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

Board Member Uplift Inc.Present

GSB Trust Board Member. Chair, Venture Fund Group Stanford UniversityPresent

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