Growth Equity

Altimeter Capital

Altimeter Capital is a technology-focused investment firm founded in 2008 by Brad Gerstner in Boston, Massachusetts, launched during the financial crisis with less than $3 million from friends and family. Headquartered in both Boston, MA and Menlo Park, CA (on Sand Hill Road), Altimeter runs a life-cycle crossover platform that backs technology companies from early stage through IPO and beyond: it manages a long/short public equity fund investing in technology companies alongside private growth equity funds targeting both early- and later-stage tech ventures. Brad Gerstner, founder, chairman and CEO, looks for platforms rather than products - businesses with network effects, expanding margins, and leaders who can adapt and scale - and has been a vocal proponent of an AI "supercycle" driven by accelerated computing and data-center demand. Altimeter also sponsored two SPACs (Altimeter Growth Corp, which merged with Grab, and Altimeter Growth Corp 2). Notable private and pre-IPO investments include Snowflake, Confluent, Okta, UiPath, GitLab, Unity, Roblox, SoFi, Plaid, ByteDance, Epic Games, dbt Labs, Baseten, and Anthropic. Reported assets under management have ranged from roughly $6.75B (Sep 2024) to higher figures across sources; Altimeter self-describes as "a technology-focused investment firm built by a founder for founders."

26 portfolio companies 20 publish APIs here 6 properties

Venture Capital Growth Equity Crossover Late Stage Public Equity Technology Artificial Intelligence Data Infrastructure Fintech Developer Tools Silicon Valley Boston North America

Altimeter Capital has 26 portfolio companies tracked on the APIs.io network, of which 20 (77%) publish APIs indexed here.

Its highest-rated API providers on the network are HubSpot, Twilio, Anthropic, UiPath, Prisma.

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 4 Complete, well-documented, and agent-ready

HubSpot 63 APIs 78.6 Twilio 35 APIs 73.2 Anthropic 11 APIs 72.6 UiPath 6 APIs 71.7

Strong 5 Solid coverage with minor gaps

Prisma 6 APIs 68.5 Okta 3 APIs 66.6 Snowflake 47 APIs 65.8 GitLab 41 APIs 64.6 Unity Technologies 27 APIs 63.4

Developing 4 Usable, with meaningful gaps to close

Uber 7 APIs 57.0 AppDynamics 9 APIs 55.2 Plaid 39 APIs 52.6 Booking Holdings 1 API 46.3

Thin 4 Limited public surface area

Baseten 3 APIs 42.3 Confluent 1 API 32.9 Roblox 8 APIs 31.7 Epic Games 5 APIs 30.6

Emerging 2 Early or largely undocumented

SoFi 6 APIs 29.4 Grab 16 APIs 22.0

Minimal 1 Almost no public developer surface

FTX 1 API 6.3

Rest of Portfolio

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

23andMeByteDancedbt LabsExpediaReify HealthSamooha

Scroll for all 6

Properties

Portfolio

Where the firm publishes its investments

Portfolio

Portfolio

Firm

The firm itself

Website

Website

Contact

Crunchbase

LinkedIn

Source (apis.yml)

aid: altimeter-capital
name: Altimeter Capital
description: >-
  Altimeter Capital is a technology-focused investment firm founded in 2008 by Brad Gerstner in Boston,
  Massachusetts, launched during the financial crisis with less than $3 million from friends and family.
  Headquartered in both Boston, MA and Menlo Park, CA (on Sand Hill Road), Altimeter runs a life-cycle
  crossover platform that backs technology companies from early stage through IPO and beyond: it manages a
  long/short public equity fund investing in technology companies alongside private growth equity funds
  targeting both early- and later-stage tech ventures. Brad Gerstner, founder, chairman and CEO,
  looks for platforms rather than products - businesses with network effects, expanding margins, and
  leaders who can adapt and scale - and has been a vocal proponent of an AI "supercycle" driven by
  accelerated computing and data-center demand. Altimeter also sponsored two SPACs (Altimeter Growth Corp,
  which merged with Grab, and Altimeter Growth Corp 2). Notable private and pre-IPO investments include
  Snowflake, Confluent, Okta, UiPath, GitLab, Unity, Roblox, SoFi, Plaid, ByteDance, Epic Games, dbt Labs,
  Baseten, and Anthropic. Reported assets under management have ranged from roughly $6.75B (Sep 2024) to
  higher figures across sources; Altimeter self-describes as "a technology-focused investment firm built by
  a founder for founders."
image: https://www.altimeter.com/favicon.ico
x-type: venture-capital
x-category: Growth Equity
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.20'
tags:
  - Venture Capital
  - Growth Equity
  - Crossover
  - Late Stage
  - Public Equity
  - Technology
  - Artificial Intelligence
  - Data Infrastructure
  - Fintech
  - Developer Tools
  - Silicon Valley
  - Boston
  - North America
apis: []
common:
  - type: Website
    url: https://www.altimeter.com/
  - type: Website
    url: https://www.altimeter.com/home
  - type: Portfolio
    url: portfolio/altimeter-capital-portfolio.yml
  - type: Contact
    url: https://www.altimeter.com/#contact_us
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/altimeter-capital
  - type: LinkedIn
    url: https://www.linkedin.com/company/altimeter-capital/
  - type: Features
    data:
      - "Stage: Growth equity (early and late-stage private) + public long/short equity"
      - "Structure: Crossover / life-cycle platform (private + public technology)"
      - "Sectors: Technology - AI, data infrastructure, developer tools, fintech, consumer internet, gaming"
      - "Geography: United States (Boston + Menlo Park) / global technology"
      - "AUM: ~$6.75B (as of Sep 2024, per Wikipedia); higher figures reported by other sources"
      - "Founded: 2008"
      - "Founder / CEO: Brad Gerstner"
      - "HQ: Boston, MA and Menlo Park, CA (2550 Sand Hill Road)"
      - "SPACs: Altimeter Growth Corp (merged with Grab), Altimeter Growth Corp 2"
    sources:
      - https://www.altimeter.com/home
      - https://en.wikipedia.org/wiki/Altimeter_Capital
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Altimeter Capital
    email: IR@altimeter.com
    url: https://www.altimeter.com/