Venture Capital

Foundry Group

Foundry Group is a Boulder, Colorado venture capital firm founded in 2007 by Brad Feld, Seth Levine, Ryan McIntyre, and Jason Mendelson. The firm invests in early-stage technology startups across the United States, organizing its work around long-lived, horizontal investment themes (such as "glue", "protocol", "distribution", and "human computer interaction") rather than narrow verticals, with a particular affinity for hardware, robotics, consumer internet, developer tools, and B2B SaaS. Foundry pioneered a "network-driven" model that operates both as a direct investor in startups and as a limited partner in a curated network of more than 40 partner venture funds. The firm manages more than $3.0B for its limited partners, has made 320+ investments and 70+ exits, and is known for radical transparency through the books, blogs, and podcasts of its partners. Notable investments include Fitbit, Zynga, SendGrid, MakerBot, Gnip, Mapbox, SeatGeek, and WHOOP. In 2022 the partners announced Foundry would not raise another fund, continuing to steward its existing funds and portfolio through their life.

110 portfolio companies 98 publish APIs here 7 properties

Venture Capital Seed Series A Early Stage Hardware Robotics Developer Tools Consumer Internet B2B SaaS Network-Driven Boulder Colorado North America

Portfolio Strength across 98 profiled portfolio companies on the network

7 top-rated API companies 1 exemplar · 6 strong

17 agent-ready companies 2 agent-native · 15 agent-ready

Average quality of the book:

Composite emerging 22.4

Agent-Readiness human-only 13.0

Firms are ranked by cumulative portfolio strength — how many highly-rated API companies they've backed, weighted by tier across composite quality and agent-readiness. The averages below are a secondary read on the typical company in the book.

Foundry Group has 110 portfolio companies tracked on the APIs.io network, of which 98 (89%) publish APIs indexed here.

Its highest-rated API providers on the network are SendGrid, HelloSign, Fitbit, Help Scout, StackHawk.

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 1 Complete, well-documented, and agent-ready

SendGrid 63 APIs 77.0

Strong 6 Solid coverage with minor gaps

HelloSign 12 APIs 65.8 Fitbit 3 APIs 62.6 Help Scout 25 APIs 62.0 StackHawk 14 APIs 60.8 SeatGeek 5 APIs 57.4 AppDirect 75 APIs 56.2

Developing 12 Usable, with meaningful gaps to close

SingleFile 7 APIs 53.9 Snappr 9 APIs 53.4 Sofar Ocean 4 APIs 53.1 Bolt 13 APIs 50.9 Mapbox 12 APIs 50.2 Butlr 2 APIs 49.9 Vendasta 8 APIs 49.9 WHOOP 7 APIs 48.1 StockTwits 9 APIs 46.4 Landing 1 API 43.9 NIFT 1 API 43.7 HitchPin 3 APIs 42.4

Thin 12 Limited public surface area

Miriel 7 APIs 40.2 Code Climate 6 APIs 39.0 Havenly 11 APIs 38.8 Knock 19 APIs 37.3 Formlabs 6 APIs 34.9 Orion by Gravity 1 API 34.9 Airship 16 APIs 32.0 Quiq 1 API 31.8 Fideo 1 API 31.1 JumpCloud 7 APIs 30.5 MakerBot 1 API 29.3 Inscribe 1 API 28.6

Emerging 24 Early or largely undocumented

Parallel Domain 26.1 Twindo 1 API 26.0 Pantheon 1 API 25.1 Spekit 24.4 FlexPoint 23.8 Jones 22.6 Looking Glass Factory 2 APIs 21.4 Adversa AI 21.3 MacroFab 21.1 RealWear 20.0 HiHello 19.8 Molekule 1 API 19.6 Authentic8 18.3 Glowforge 18.0 Sovrn 17.3 Tracera 16.7 Ferrum Health 16.4 Boundless 16.3 Wholesail 16.2 Pilot 15.2 Sphero 14.6 Suzy 14.4 Meru Health 13.8 Qwick 13.1

Minimal 43 Almost no public developer surface

Modular Robotics 12.9 Buncha 12.3 FloatMe 11.6 Regard 10.7 Cake 10.5 Harmonix 9.7 Hustle Fund 9.7 Chingona Ventures 8.5 Lowercarbon Capital 8.4 Spider Capital 8.4 Resolute Ventures 8.0 Westbound Equity Partners 8.0 High Alpha Capital 7.5 Pioneer Square Labs 7.5 Basis Set Ventures 7.3 Bowery Capital 7.3 Twine Ventures 7.3 SuperCircle 7.1 Lemnos Labs 6.9 TenOneTen 6.6 K9 Ventures 6.2 IA Ventures 6.1 Zynga 6.1 Avid Ventures 5.4 BlueYard 5.4 Calibrate Ventures 5.4 Founder Collective 5.4 Golden Ventures 5.4 Maple 5.4 Matchstick Ventures 5.4 SK Ventures 5.4 Springbank Collective 5.4 01 Advisors 5.0 AdMeld 5.0 Freestyle 5.0 Gnip 5.0 Ludlow Ventures 5.0 Moxxie Ventures 5.0 Placeholder 5.0 Rodeo 5.0 Slauson & Co. 5.0 Union Square Ventures 5.0 Wave Capital 5.0

Rest of Portfolio

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

Arthur VenturesBonfire VenturesCostanoa VenturesForerunner VenturesHomebrewKindred VenturesLeadout CapitalStarting Line VCStellationTechstars VenturesTrue VenturesUncork Capital

Scroll for all 12

Properties

Portfolio

Where the firm publishes its investments

Portfolio

Portfolio

Portfolio

Portfolio

Team

Partners and investing staff

Team

Team

Team

Team

Firm

The firm itself

Website

Website

Crunchbase

Crunchbase

LinkedIn

Source (apis.yml)

aid: foundry-group
name: Foundry Group
description: >-
  Foundry Group is a Boulder, Colorado venture capital firm founded in 2007 by Brad Feld, Seth Levine,
  Ryan McIntyre, and Jason Mendelson. The firm invests in early-stage technology startups across the
  United States, organizing its work around long-lived, horizontal investment themes (such as "glue",
  "protocol", "distribution", and "human computer interaction") rather than narrow verticals, with a
  particular affinity for hardware, robotics, consumer internet, developer tools, and B2B SaaS. Foundry
  pioneered a "network-driven" model that operates both as a direct investor in startups and as a limited
  partner in a curated network of more than 40 partner venture funds. The firm manages more than $3.0B for
  its limited partners, has made 320+ investments and 70+ exits, and is known for radical transparency
  through the books, blogs, and podcasts of its partners. Notable investments include Fitbit, Zynga,
  SendGrid, MakerBot, Gnip, Mapbox, SeatGeek, and WHOOP. In 2022 the partners announced Foundry would not
  raise another fund, continuing to steward its existing funds and portfolio through their life.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://foundry.vc/favicon.ico
x-type: venture-capital
x-category: Venture Capital
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
tags:
  - Venture Capital
  - Seed
  - Series A
  - Early Stage
  - Hardware
  - Robotics
  - Developer Tools
  - Consumer Internet
  - B2B SaaS
  - Network-Driven
  - Boulder
  - Colorado
  - North America
apis: []
common:
  - type: Website
    url: https://foundry.vc/
  - type: Portfolio
    url: https://foundry.vc/portfolio/
  - type: Portfolio
    url: portfolio/foundry-group-portfolio.yml
  - type: Team
    url: https://foundry.vc/team/
  - type: Team
    url: team/foundry-group-team.yml
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/foundryvc
  - type: LinkedIn
    url: https://www.linkedin.com/company/foundry-vc
  - type: Features
    data:
      - "Stage: Early stage (Seed, Series A) direct investments + limited partner in partner funds"
      - "Model: Network-driven venture capital (direct investments + LP in 40+ partner funds)"
      - "Sectors: hardware, robotics, consumer internet, developer tools, B2B SaaS"
      - "Themes: horizontal themes (glue, protocol, distribution, human computer interaction)"
      - "Geography: United States"
      - "AUM: more than $3.0B for limited partners (self-reported)"
      - "Activity: 320+ investments, 70+ exits, 75+ active portfolio companies, 40+ partner funds"
      - "Founded: 2007"
      - "HQ: Boulder, Colorado, USA"
      - "Note: In 2022 the partners announced they would not raise another fund"
    sources:
      - https://foundry.vc/
      - https://foundry.vc/portfolio/
      - https://www.crunchbase.com/organization/foundryvc
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Foundry Group
    url: https://foundry.vc/