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 25 publish APIs here 6 properties
Venture CapitalGrowth EquityCrossoverLate StagePublic EquityTechnologyArtificial IntelligenceData InfrastructureFintechDeveloper ToolsSilicon ValleyBostonNorth America
Portfolio Strength across 25 profiled portfolio companies on the network
10 top-rated API companies 4 exemplar · 6 strong
10 agent-ready companies 0 agent-native · 10 agent-ready
Average quality of the book:
Composite thin 40.0
Agent-Readiness agent-aware 21.9

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.

Altimeter Capital has 26 portfolio companies tracked on the APIs.io network, of which 25 (96%) publish APIs indexed here.

Its highest-rated API providers on the network are HubSpot, Anthropic, Twilio, Plaid, Confluent.

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
Strong 6 Solid coverage with minor gaps
Developing 4 Usable, with meaningful gaps to close
Thin 6 Limited public surface area
Emerging 1 Early or largely undocumented
Minimal 4 Almost no public developer surface

Rest of Portfolio

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

dbt Labs

Scroll for all 1

Properties

Portfolio

Where the firm publishes its investments

Firm

The firm itself

Cohort brief

Auto-generated

The 25 portfolio companies with APIs in the catalog, backed by Altimeter Capital, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
25
all scored
Mean Kin Score
41.7
+21.0 vs catalog 20.7
Mean Agent Readiness
23.5
+13.8 vs catalog 9.7
Spread
5.3–82.4
median 47 · σ 22.3
How the 25 split by band
Exemplar 4Strong 5Developing 4Thin 7Emerging 1Minimal 4
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 48.3 17.5 +30.8 25
Developer Ergonomics 42.1 17.9 +24.2 25
Access Clarity 44 22.3 +21.7 25
Operational Transparency 27.9 11.3 +16.6 25
Contract Governance 15.9 6.4 +9.5 25
Discoverability 65.5 60.4 +5.1 25

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 40% 16% +24
MCP server (first-party) 12% 7% +5
Agent Skills 0% 0% 0
OAuth scopes 16% 9% +7
Security 100% 88% +12
Arazzo workflows 36% 2% +34
Governance rules 56% 13% +43

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 HubSpot 82.4
  2. 2 Twilio 73.4
  3. 3 Anthropic 68.6
  4. 4 Plaid 68.2
  5. 5 GitLab 65.3
  6. 6 UiPath 61.7
  7. 7 Unity 58.2
  8. 8 Okta 57.6
  9. 9 Snowflake 54.6
  10. 10 Uber 48.7
Top by Agent Readiness
  1. 1 HubSpot 54.4
  2. 2 GitLab 47.8
  3. 3 Twilio 38.5
  4. 4 Anthropic 38.1
  5. 5 Plaid 37.2
  6. 6 Prisma 36.8
  7. 7 Snowflake 35.8
  8. 8 UiPath 32.9
  9. 9 Booking Holdings 29.1
  10. 10 Okta 25.6
All 25 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Source (apis.yml)

apis.yml Raw ↑
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."
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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://www.altimeter.com/favicon.ico
x-type: venture-capital
x-category: Growth Equity
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
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/

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