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."
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.
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.
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Properties
Firm
The firm itself
Cohort brief
Auto-generatedThe 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.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| 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.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| 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.
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.