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
The Kleiner Perkins API Portfolio cover
API Evangelist Portfolio Report
The Kleiner Perkins API Portfolio

A small book with the densest top end measured in this series, where every exemplar is a frontier AI or design-infra bet and the mature franchises ship breadth but no agent surface.

Read the report $750.00 · every API-bearing company in the book, scored on the Kin Score
Portfolio Strength across 228 profiled portfolio companies on the network
16 top-rated API companies 3 exemplar · 13 strong
31 agent-ready companies 0 agent-native · 31 agent-ready
Average quality of the book:
Composite emerging 20.8
Agent-Readiness human-only 10.1

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 230 (100%) publish APIs indexed here.

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

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 3 Complete, well-documented, and agent-ready
Strong 13 Solid coverage with minor gaps
Developing 34 Usable, with meaningful gaps to close
Thin 24 Limited public surface area
Emerging 45 Early or largely undocumented
Minimal 109 Almost no public developer surface
Rogo10.9Foundation Medicine10.8American Superconductor Corporation10.6Audible10.6Bloom Energy10.6Crystal Dynamics10.6Karma Science10.6Future10.5Lotus Health AI10.5Armadin10.2Collabra10.2TerraFirma10.2Applied Compute10.0Beyond Meat9.7Gambit9.7MedArrive9.5Jive9.4LegalZoom9.2Poetic9.2Lumeris9.0Beam Dental8.9Ionic Security8.5Juna.ai8.4LendingClub1 API8.0ArcSight7.9FabFitFun7.6Amyris7.2Chef Robotics7.1Area 1 Security6.9Convoke6.7Bedrock Systems6.1Endgame5.7Macromedia5.7CoreOS5.3Engine ML5.3Inkitt5.3Klout5.33VR5.041st Parameter5.0@Home Network5.0AdKnowledge5.0AutoTrader.com5.0Azarus5.0Bison Trails5.0BuddyBuild5.0CloudPhysics5.0Compaq Computer Corporation5.0Corio5.0Crossbar5.0Crystal5.0Drawbridge5.0Dropcam5.0EdgeSpring5.0Engram5.0Eo Computer5.0Excite@Home5.0Flipagram5.0General Radar5.0Good Technology5.0HYLA5.0IControl Networks5.0Internet Security Systems5.0Kalpana5.0Katango5.0LSI5.0Luvocracy5.0LuxCreo5.0Manifest OS5.0Mind Robotics5.0Mirendil5.0Roadrunner5.0Balerion4.2Handspring4.1Indigo4.1Jask4.1Ketera4.1Lotus Development4.1LuxVue Technology4.1Marimba4.1Amprius3.8Boston Scientific3.7Breathe Technologies3.6ArsenalBio3.3Atara Bio3.3Epizyme3.3Linear Technology3.3Livongo3.3NewLimit3.0Align Technology2.9Arresto Biosciences2.9ARMO BioSciences2.2Cardiovascular Devices2.2Cell Design Labs2.2Corventis2.2Crescendo Bioscience2.2Evalve2.2Flexus Biosciences2.2Genomic Health2.2IDEC Pharmaceuticals2.2Intersect ENT2.2Millennium Pharmaceuticals2.2GenPharm1.3Heartport1.3iPierian1.3Ascend Communications0.6Cerent0.6Destineer0.6Diamond Lane0.6Lightera0.6
Unrated 2 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 228 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
228
of 230 on the roster
Mean Kin Score
20.4
-0.3 vs catalog 20.7
Mean Agent Readiness
10.1
+0.4 vs catalog 9.7
Spread
0.6–69.7
median 13.1 · σ 18.3
How the 228 split by band
Exemplar 3Strong 10Developing 31Thin 33Emerging 43Minimal 108
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 19.2 17.5 +1.7 228
Operational Transparency 11.9 11.3 +0.6 228
Developer Ergonomics 18.5 17.9 +0.6 228
Contract Governance 5.6 6.4 -0.8 228
Discoverability 59.5 60.4 -0.9 228
Access Clarity 19.7 22.3 -2.6 228

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) 16% 16% 0
MCP server (first-party) 7% 7% 0
Agent Skills 0% 0% 0
OAuth scopes 10% 9% +1
Security 75% 88% -13
Arazzo workflows 4% 2% +2
Governance rules 14% 13% +1

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 fal 69.7
  2. 2 Parallel 69
  3. 3 Anthropic 68.6
  4. 4 Figma 63.8
  5. 5 Profound 61.7
  6. 6 Arcade 60.8
  7. 7 Intuit 59.2
  8. 8 Databricks 59.1
  9. 9 Moveworks 58.8
  10. 10 Allium 58.3
Top by Agent Readiness
  1. 1 Parallel 59.9
  2. 2 Profound 59.2
  3. 3 Huntress 54.9
  4. 4 Reevo 54.7
  5. 5 Figma 53.2
  6. 6 Nooks 51.1
  7. 7 Moveworks 42.3
  8. 8 Allium 41.3
  9. 9 Databricks 40.1
  10. 10 Google 39.2
This roster declares 230 members; 228 resolve to a provider in the catalog and 228 carry a score (100%). The figures above describe the scored members only.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: 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

Work with this as data

Every firm here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for venture capital

7 MCP tools reach this
  • find_vcsBrowse and filter every firm in the catalog.
  • vc_portfolioThe firm's portfolio, each company network-matched and rated.
  • find_investorsThe reverse edge — which firms back a given provider.
  • cohort_statsPRO — the portfolio as a scored cohort.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This firm
curl "https://apis.io/api/v1/vcs/kleiner-perkins"
All venture capital
curl "https://apis.io/api/v1/vcs?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.