Fundraising Fox
/People
Sign in

Ian Sigalow

InvestorFounder

Co-Founder & Managing Partner at Greycroft

New York, NY

Writes $500K – $30M checks · typically $25M

FoundedGreycroft

Find your path to Ian

Sign up to see every warm intro you have to Ian

  • Paths you didn't know you had: your email and LinkedIn already hold routes to Ian. We find them for you
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Sign up with GoogleAlready have an account? Log in

About

Ian Sigalow co-founded Greycroft in 2006 and is its Managing Partner in New York, guiding investment strategy with a recent focus on AI. He previously founded StrongData, a payment encryption startup, and began his VC career at Boston Millennia Partners. He holds a BS from MIT and an MBA from Columbia Business School.

Contact· self-published, not guessed

Invests in

AdTechAI & Machine LearningDirect to ConsumerEnterprise SoftwareFintechHealthtechSaaS

Founder at Greycroft

Intro paths

→

In turn, Ian can intro founders to Greycroft's investors below.

Greycroft's investors · 18

AMD VenturesSanta Clara · since 2026Andreessen HorowitzMenlo Park · $500K – $50M checks · since 2026CRV (Charles River Ventures)Bay Area · $250K – $5M checks · since 2026DCVC (Data Collective)Palo Alto · $5M – $25M checks · since 2026Emergence Capital PartnersSan Francisco · $500K – $10M checks · since 2026General CatalystSan Francisco · $30M checks · since 2026Greylock PartnersSan Francisco · $100K – $10M checks · since 2026Index VenturesSan Francisco · $540K – $10.8M checks · since 2026LG Technology VenturesSilicon Valley · since 2026Lightspeed Venture PartnersMenlo Park · $1M – $5M checks · since 2026Linse CapitalSan Juan · since 2026New Enterprise Associates (NEA)Menlo Park · $200K – $40M checks · since 2026Oak HC/FTStamford · since 2026Renaissance Venture CapitalAnn ArborSBI InvestmentTokyo · since 2026Sequoia CapitalMenlo Park · $100K – $50M checks · since 2026SoftBank GroupTokyo · since 2026Spark CapitalSan Francisco · $500K – $25M checks · since 2026

Co-founders at Greycroft

GLGrant LaFontaine
Grant LaFontaineCEO & Co-Founder
LHLogan Head
Logan HeadCo-Founder
AL
Alexandre LeBrunCEO & Co-founder
YLYann LeCun
Yann LeCun

Deals · 17

Branch Financial, Inc.Board seat

via Greycroft · filed May 2022

PetChiBoard seat

via Greycroft · filed Apr 2022 · $44M raise

Fetch RewardsBoard seat

via Greycroft · filed Apr 2022 · $300M raise

PETABYTE TECHNOLOGY INC.Board seat

via Greycroft · filed Jul 2021 · $18M raise

CurisiumBoard seat

via Greycroft · filed Jul 2021 · $100M raise

Longtail AD SolutionsBoard seat

via Greycroft · filed Jun 2021 · $54.5M raise

MercatoBoard seat

via Greycroft · filed Mar 2021 · $29.6M raise

RooBoard seat

via Greycroft · filed Jan 2020 · $10M raise

Verse TechnologiesBoard seat

via Greycroft · filed Aug 2018 · $2M raise

Pie InsuranceBoard seat

via Greycroft · filed Aug 2018 · $11M raise

Data Plus MathBoard seat

via Greycroft · filed Apr 2018 · $4.5M raise

COLLECTIVE INCBoard seat

via Greycroft · filed Jan 2018 · $14.5M raise

ResonateBoard seat

via Greycroft · filed Oct 2017 · $11M raise

ShiptBoard seat

via Greycroft · filed Jun 2017 · $40M raise

press ↗

7hops.com, Inc.Board seat

via Greycroft · filed Oct 2015 · $3.3M raise

VenmoLed round

via Greycroft

WorkFusionLed round

via Greycroft

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Led

BraintreeBright Health GroupBuddy MediaExtreme ReachPlatedPublic.com

Sources: the firm's website · curated public sources · SEC Form D filings.

Colleagues at Greycroft

Aaron Athanas
People Operations Associate at Greycroft
Addie Ewald
Investor at Greycroft
Alan Patricof
Chairperson & Co-Founder at Primetime Partners
Alex Constantinople
Chief Marketing Officer at Greycroft
Allison Beck
Head of Events & Foundation at Greycroft
Andrew Scott
Senior Finance Manager at Greycroft
Andrew Ying
Investor at Greycroft
Ann Paulose
Senior Investor Relations Associate at Greycroft

Frequently asked questions

Who is Ian Sigalow?
Ian Sigalow co-founded Greycroft in 2006 and is its Managing Partner in New York, guiding investment strategy with a recent focus on AI. He previously founded StrongData, a payment encryption startup, and began his VC career at Boston Millennia Partners. He holds a BS from MIT and an MBA from Columbia Business School.
Where does Ian Sigalow work?
Ian Sigalow is Founder of Greycroft and Co-Founder & Managing Partner at Greycroft.
What does Ian Sigalow invest in?
Ian Sigalow invests in AdTech, AI & Machine Learning, Direct to Consumer, Enterprise Software, Fintech, Healthtech, SaaS.
What check size does Ian Sigalow write?
Ian Sigalow typically writes checks of $500K – $30M.
What companies did Ian Sigalow found?
Ian Sigalow founded Greycroft.
What boards does Ian Sigalow sit on?
Ian Sigalow holds tracked board seats at 7hops.com, Inc., Amplify Life, Branch Financial, Inc., ClosedLoop, COLLECTIVE INC, Curisium, Data Plus Math, Ergatta, Fetch Rewards, Landing.
What companies has Ian Sigalow invested in?
Investments tracked here include Braintree, Bright Health Group, Buddy Media, Data Plus Math, Extreme Reach, Plated, Public.com, Shipt, Venmo, WorkFusion, Amplify Life, Curisium, and 21 more.
Does Ian Sigalow lead rounds?
Yes — Ian Sigalow has led 10 tracked investments.

Founder mafias

About this profile. Compiled from public sources — Greycroft's own website, regulatory filings and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights