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

627 CONNECTIONS

Stanford University Graduate School of Business Network

586 CONNECTIONS

Credit Suisse Network

320 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: Aaron Jacobson (New Enterprise Associates (NEA)), Ilya Kirnos (SignalFire), 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)), Akriti Dokania (Ridge Ventures (Formerly known as IDG Ventures USA)), Matthew Ziskie (Bungalow Capital), David Ambrose (Steadfast Venture Capital), Ravi Belani (Alchemist Accelerator)
ReFiBuy	SeedMay 2026$15M	$17M
Co-investors: Matt Nichols (Commerce Ventures), Bob Hower (Advanced Technology Ventures), Scot Wingo (Triangle Tweener Fund), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), 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: Eric Wiesen (RRE Ventures), Kevin O'Connor (ScOp Venture Capital), Andrew Jones (Attentive), Aaron Schildkrout (Addition), Michael Cardamone (Forum Ventures), Mike Smerklo (Next Coast Ventures), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA))
OfferFit	Series BNov 2023$25M	$39M
Co-investors: Bradley Horowitz (Google Ventures), Alex Clayton (Spark Capital), Mike Ghaffary (Canvas Ventures), JP (Jean-Paul) Sanday (Menlo Ventures), Edward Lando (Pareto Holdings), 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), Ron Pragides (GTMFund), Katelyn Donnelly (Avalanche VC), Jeremy Stoppelman (Yelp.com), Kevin Stumpf, Ryan Carlson, Frederic Kerrest
SafeGraph	Series BMar 2021$45M Series AApr 2017$16M	$61M
Co-investors: Jeff Epstein (Bessemer Venture Partners), Fabrice Grinda (FJ Labs), Cathy Gao (Sapphire Ventures), Chris Scoggins (SignalFire), Paul Levine (Sapphire Ventures), Chris Farmer (SignalFire), Jonathan Abrams (8-Bit Capital), Adrian Aoun (500 Startups Korea), Naval Ravikant (Sm4rt Predictive Systems), Peter Thiel (The Founders Fund), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Itamar Novick (Recursive Ventures), Pete Briger (Fortress Investment Group), Robert Pittman (iHeartMedia), Brian O'Kelley (Scope3), Kim Perell (100.co), 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 (Rule 1 Ventures), Scott Faber (NFX Guild), Ethan Beard (Piazza Venture 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), Eric Chernoff (Dagster Labs), Russ Fradin, Adam Foroughi, Nicolas Berggruen, Saran Chari, Joe Zawadzki, Adam D'Angelo
Outlier	Series BJan 2020$22M Series AJul 2018$6M	$78M
Co-investors: Leo Polovets (Susa Ventures), John Lyman (GV (Google Ventures)), Julia Stiglitz (GSV Ventures), Seetharam Venkatesh (Capital One Ventures), Neil Sirni (Proximity Ventures), Stephen Francis (Roc Nation), Brad Greenwald (Hilltop Venture Partners), Mike Smerklo (Next Coast Ventures), Alex Rosen (Ridge Ventures (Formerly known as IDG Ventures USA)), Marc Ladin (VoicePunch VC), 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