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.
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, Google, DoorDash, Instacart, Parallel.
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 8 Complete, well-documented, and agent-ready
Strong 7 Solid coverage with minor gaps
Developing 31 Usable, with meaningful gaps to close
Thin 20 Limited public surface area
Emerging 19 Early or largely undocumented
Minimal 2 Almost no public developer surface
Properties
Portfolio
Where the firm publishes its investments
Firm
The firm itself
Cohort brief
Auto-generatedThe 165 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.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 27.8 | 23.1 | +4.7 | 165 |
| Contract Quality | 21.7 | 17.6 | +4.1 | 165 |
| Operational Transparency | 17.6 | 13.6 | +4 | 165 |
| Access Clarity | 27.9 | 26.4 | +1.5 | 165 |
| Discoverability | 59 | 58.2 | +0.8 | 165 |
| Contract Governance | 6.4 | 6.3 | +0.1 | 165 |
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) | 20% | 15% | +5 |
| MCP server (first-party) | 18% | 12% | +6 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 13% | 11% | +2 |
| Security | 91% | 98% | -7 |
| Arazzo workflows | 4% | 2% | +2 |
| 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.
Coverage caveat. 141 of 165 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 3 October 2026, across 28834 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)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.