Venture Capital

Union Square Ventures

Union Square Ventures (USV) is a thesis-driven, early-stage venture capital firm founded in 2003 by Fred Wilson and Brad Burnham and headquartered at 817 Broadway in New York City. USV invests at the edge of large markets being transformed by technological and societal pressures, historically backing large networks of engaged users that are differentiated through user experience and defensible through network effects, and more recently companies that broaden access to knowledge, capital, and well-being. The firm invests primarily at Seed and Series A across three strategies — a Core fund, a Climate fund, and an Opportunity (later-stage) fund — with check sizes typically ranging from roughly $1M at seed to the low-to-mid single-digit millions at Series A. USV runs a small, collegial partnership and focuses on social media, marketplaces, developer tools, learning/education, health, fintech, web3/decentralized protocols, energy, and climate. It reports roughly $1.9B in assets under management across 14 funds. Notable investments include Twitter, Etsy, Coinbase, Stripe, Cloudflare, MongoDB, Twilio, Duolingo, Kickstarter, Stack Overflow, SoundCloud, and Carta.

206 portfolio companies 42 publish APIs here 13 properties
Venture CapitalSeedSeries AFintechMarketplacesDeveloper ToolsWeb3ClimateNew York

Union Square Ventures has 206 portfolio companies tracked on the APIs.io network, of which 42 (20%) publish APIs indexed here.

Its highest-rated API providers on the network are Stripe, Twilio, Stack Overflow, Cloudflare, Etsy.

Portfolio on the Network

Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.

Exemplar 3 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Developing 10 Usable, with meaningful gaps to close
Thin 15 Limited public surface area
Emerging 8 Early or largely undocumented
Minimal 2 Almost no public developer surface

Rest of Portfolio

164 further portfolio companies that don’t yet have a provider page on the network.

AbridgeAgenteroAlifealt.bankAMEEAminoAnonAnthro EnergyAssemblyAuxmoneyBehanceBlackbird LabsBlixtBlocktower CapitalBoardBolsterBoxeeBrewsterBright Moments DAOBrilliant PlanetBuglabsC2FOCactosCarbonChainCaretakerCasetextCircleupClickableClueCodeCodecademyConsensusCovestorCrowdRiseDapper LabsDavid EnergyDaybreakDaylightDeliciousDiaDoctronicDreamboundDuolingoDwollaEdmodoEfficient ComputerElectroflowFeedburnerFigure1FirebaseFiveableFloodMappFlurryfomoFoursquareFREE NOWFunding CircleGeneral IntelligenceGeneralistGetGlueGlowgoTennaHeadgumHeyzapHuman DxHumane GenomicsIsembardJamJobbaticalJourney ClinicalKaratKickstarterKikKioskKitchensurfingKokoLa Ruche qui dit Oui!LeapLithos CarbonLydianMarley SpoonMeet CuteMetaStable CapitalMindsetModern FertilityMolten IndustriesMombakMulticoin CapitalMundiNCXNeynarNoahNoyaNumeraiNurxOB1OddcastOdysseyOnefootballOstromOtisOutschoolOutside.inParagraphParallel MarketsPayjoyPilotPlaceholderPluralisPolychain CapitalPossible FinancePrestoPropsProtocol LabsQuizletRadiantRealtySharesRecallRecount MediaRemoraReturn PathRupa HealthScience ExchangeScrollShapewaysShift EVShopShopsSidecarSigFigSimulmediaSkillshareSlingSmartHopSofar OceanSofar SoundssoonaSoraSpliceStacksSuper PaymentsSuppCoSupperTacodaTargetspotTasty LabsTeamsharesTop HatTucowsTurntableTutor IntelligenceUnigridUpgradeVeniamVolterasWattpadWesabeWork MarketWrenXFuelYieldmoZanskarZeitviewZemantaZynga

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Properties

Portfolio

Where the firm publishes its investments

Team

Partners and investing staff

Content

Blog, podcast, newsletter, and research

Firm

The firm itself

Source (apis.yml)

apis.yml Raw ↑
aid: union-square-ventures
name: Union Square Ventures
description: >-
  Union Square Ventures (USV) is a thesis-driven, early-stage venture capital
  firm founded in 2003 by Fred Wilson and Brad Burnham and headquartered at 817
  Broadway in New York City. USV invests at the edge of large markets being
  transformed by technological and societal pressures, historically backing
  large networks of engaged users that are differentiated through user
  experience and defensible through network effects, and more recently companies
  that broaden access to knowledge, capital, and well-being. The firm invests
  primarily at Seed and Series A across three strategies — a Core fund, a
  Climate fund, and an Opportunity (later-stage) fund — with check sizes
  typically ranging from roughly $1M at seed to the low-to-mid single-digit
  millions at Series A. USV runs a small, collegial partnership and focuses on
  social media, marketplaces, developer tools, learning/education, health,
  fintech, web3/decentralized protocols, energy, and climate. It reports roughly
  $1.9B in assets under management across 14 funds. Notable investments include
  Twitter, Etsy, Coinbase, Stripe, Cloudflare, MongoDB, Twilio, Duolingo,
  Kickstarter, Stack Overflow, SoundCloud, and Carta.
x-type: venture-capital
x-category: Venture Capital
image: https://www.usv.com/favicon.ico
tags:
  - Venture Capital
  - Seed
  - Series A
  - Fintech
  - Marketplaces
  - Developer Tools
  - Web3
  - Climate
  - New York
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
apis: []
common:
  - type: Website
    url: https://www.usv.com/
  - type: Portfolio
    url: https://www.usv.com/companies
  - type: Portfolio
    url: portfolio/union-square-ventures-portfolio.yml
  - type: Team
    url: https://www.usv.com/people/
  - type: Team
    url: team/union-square-ventures-team.yml
  - type: InvestmentThesis
    url: https://www.usv.com/about/
  - type: InvestmentThesis
    url: https://www.usv.com/idea/usv-investment-thesis/
  - type: Blog
    url: https://www.usv.com/writing/
  - type: Jobs
    url: https://jobs.usv.com/
  - type: Contact
    url: mailto:info@usv.com
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/union-square-ventures
  - type: LinkedIn
    url: https://www.linkedin.com/company/union-square-ventures
  - type: Twitter
    url: https://twitter.com/usv
  - type: Features
    data:
      - 'Stage: Seed and Series A (early-stage), plus later-stage via the Opportunity fund'
      - 'Typical check: ~$1M at seed, low-to-mid single-digit millions at Series A'
      - 'Sectors: social media, marketplaces, developer tools, learning/education, health, fintech, web3/decentralized protocols, energy, climate'
      - 'Geography: United States (NYC-based), with global investments including Europe'
      - 'AUM: ~$1.9B across 14 funds (self-reported)'
      - 'Strategies: Core fund, Climate fund, Opportunity (later-stage) fund'
      - 'Founded: 2003'
      - 'Founders: Fred Wilson, Brad Burnham'
      - 'HQ: 817 Broadway, 14th Floor, New York, NY 10003'
    sources:
      - https://www.usv.com/about/
      - https://www.usv.com/idea/usv-investment-thesis/
      - https://www.crunchbase.com/organization/union-square-ventures
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Union Square Ventures
    url: https://www.usv.com/