Venture Capital

Kleiner Perkins

Kleiner Perkins is one of Silicon Valley's oldest and most storied venture capital firms, founded in 1972 by Eugene Kleiner and Tom Perkins and headquartered on Sand Hill Road in Menlo Park, California, with additional offices in San Francisco and Shanghai. Across more than five decades and 21 venture funds plus 6 growth funds, the firm has invested over $10 billion and backed more than 900 ventures, including foundational companies such as Amazon, Google, Genentech, Electronic Arts, Juniper Networks, Intuit, Spotify, Figma, Robinhood, DoorDash, Duolingo and Databricks. Kleiner Perkins partners with founders from inception through IPO and beyond across early and growth stages, with seed rounds averaging roughly $4-5M and Series A rounds around $17-18M. In 2026 the firm announced its twenty-second venture fund, KP22, a $1B early-stage fund, alongside $2.5B in new growth funds. Current investment focus centers on artificial intelligence and AI safety, enterprise software, developer tools and infrastructure, healthcare and biotech, fintech, hardtech and autonomous systems, and cybersecurity, with a thesis that the right idea, team and partners can create an entirely new industry.

230 portfolio companies 230 publish APIs here 12 properties
Venture CapitalEarly StageGrowth EquityArtificial IntelligenceDeveloper ToolsInfrastructureEnterprise SoftwareFintechHealthcareSilicon Valley
Portfolio Strength across 86 profiled portfolio companies on the network
17 top-rated API companies 6 exemplar · 11 strong
35 agent-ready companies 1 agent-native · 34 agent-ready
Average quality of the book:
Composite thin 40.8
Agent-Readiness agent-aware 25.5

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.

Kleiner Perkins has 230 portfolio companies tracked on the APIs.io network, of which 87 (38%) publish APIs indexed here. The remaining 143 are tracked as profiles without a published API on the network.

Its highest-rated API providers on the network are Anthropic, DoorDash, Arcade, Instacart, Fal.

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 6 Complete, well-documented, and agent-ready
Strong 11 Solid coverage with minor gaps
Developing 34 Usable, with meaningful gaps to close
Thin 21 Limited public surface area
Emerging 13 Early or largely undocumented
Minimal 1 Almost no public developer surface
Unrated 1 Not yet scored

Properties

Portfolio

Where the firm publishes its investments

Team

Partners and investing staff

Content

Blog, podcast, newsletter, and research

Firm

The firm itself

Other

Everything else declared in apis.yml

Cohort brief

Auto-generated

The 160 portfolio companies with APIs in the catalog, backed by Kleiner Perkins, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
160
of 230 on the roster
Mean Kin Score
27.6
+3.2 vs catalog 24.4
Mean Agent Readiness
14.7
+2.0 vs catalog 12.7
Spread
3.3–77.8
median 23.3 · σ 19.2
How the 160 split by band
Exemplar 6Strong 11Developing 34Thin 23Emerging 39Minimal 47
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 25.7 20.4 +5.3 160
Developer Ergonomics 28.6 23.8 +4.8 160
Operational Transparency 18.2 14.4 +3.8 160
Access Clarity 28.9 27.2 +1.7 160
Discoverability 62.2 61.5 +0.7 160
Contract Governance 6.7 6.6 +0.1 160

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) 13% 11% +2
MCP server (first-party) 17% 13% +4
Agent Skills 0% 0% 0
OAuth scopes 13% 12% +1
Security 93% 96% -3
Arazzo workflows 5% 2% +3
Governance rules 17% 13% +4

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 Anthropic 77.8
  2. 2 Doordash 75.8
  3. 3 Arcade 75.7
  4. 4 Instacart 70.5
  5. 5 fal 69.7
  6. 6 Docusign 68.9
  7. 7 Parallel 65
  8. 8 Profound 64.7
  9. 9 Intuit 62.7
  10. 10 Juniper Networks 58.3
Top by Agent Readiness
  1. 1 Parallel 65
  2. 2 Profound 56.5
  3. 3 Reevo 56.5
  4. 4 Nooks 56.3
  5. 5 Huntress 55.6
  6. 6 Figma 54.7
  7. 7 fal 52.8
  8. 8 Brex 45.7
  9. 9 Synthesia 44.6
  10. 10 Sail Research 41.4
This roster declares 230 members; 221 resolve to a provider in the catalog and 160 carry a score (72%). The figures above describe the scored members only.Generated from the catalog build of 22 September 2026, across 27674 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: kleiner-perkins
name: Kleiner Perkins
description: >-
  Kleiner Perkins is one of Silicon Valley's oldest and most storied venture
  capital firms, founded in 1972 by Eugene Kleiner and Tom Perkins and
  headquartered on Sand Hill Road in Menlo Park, California, with additional
  offices in San Francisco and Shanghai. Across more than five decades and 21
  venture funds plus 6 growth funds, the firm has invested over $10 billion and
  backed more than 900 ventures, including foundational companies such as Amazon,
  Google, Genentech, Electronic Arts, Juniper Networks, Intuit, Spotify, Figma,
  Robinhood, DoorDash, Duolingo and Databricks. Kleiner Perkins partners with
  founders from inception through IPO and beyond across early and growth stages,
  with seed rounds averaging roughly $4-5M and Series A rounds around $17-18M. In
  2026 the firm announced its twenty-second venture fund, KP22, a $1B early-stage
  fund, alongside $2.5B in new growth funds. Current investment focus centers on
  artificial intelligence and AI safety, enterprise software, developer tools and
  infrastructure, healthcare and biotech, fintech, hardtech and autonomous
  systems, and cybersecurity, with a thesis that the right idea, team and partners
  can create an entirely new industry.
x-type: venture-capital
x-category: Venture Capital
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.kleinerperkins.com/brand-assets/
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
tags:
  - Venture Capital
  - Early Stage
  - Growth Equity
  - Artificial Intelligence
  - Developer Tools
  - Infrastructure
  - Enterprise Software
  - Fintech
  - Healthcare
  - Silicon Valley
apis: []
common:
  - type: Website
    url: https://www.kleinerperkins.com
  - type: Portfolio
    url: https://www.kleinerperkins.com/partnerships/
  - type: Portfolio
    url: portfolio/kleiner-perkins-portfolio.yml
  - type: Team
    url: https://www.kleinerperkins.com/people/
  - type: Team
    url: team/kleiner-perkins-team.yml
  - type: InvestmentThesis
    url: https://www.kleinerperkins.com/perspectives/
  - type: Blog
    url: https://www.kleinerperkins.com/perspectives/
  - type: About
    url: https://www.kleinerperkins.com/about/
  - type: LinkedIn
    url: https://www.linkedin.com/company/kleinerperkins/
  - type: Twitter
    url: https://x.com/kleinerperkins
  - type: YouTube
    url: https://www.youtube.com/@KleinerPerkinsVideos
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/kleiner-perkins-caufield-byers
  - type: Features
    data:
      - 'Stage: Early stage (seed, Series A) through growth'
      - 'Typical check: seed rounds avg ~$4-5M; Series A rounds avg ~$17-18M'
      - 'Sectors: AI & AI safety, enterprise software, developer tools & infrastructure, healthcare & biotech, fintech, hardtech, cybersecurity'
      - 'Geography: United States (Silicon Valley) with global reach; offices in Menlo Park, San Francisco, Shanghai'
      - 'AUM: over $10B invested across 21 venture + 6 growth funds; KP22 = $1B (2026) + $2.5B growth funds (2026)'
      - 'Founded: 1972'
      - 'HQ: Menlo Park, California (Sand Hill Road)'
      - 'Ventures backed: 900+'
    sources:
      - https://www.kleinerperkins.com/about/
      - https://en.wikipedia.org/wiki/Kleiner_Perkins
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Kleiner Perkins
    url: https://www.kleinerperkins.com

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