Venture Capital

Uncork Capital

Uncork Capital is a San Francisco-based seed-stage venture capital firm founded in 2004 by Jeff Clavier, who formalized his angel portfolio into one of Silicon Valley's earliest dedicated seed funds; it operated as SoftTech VC until rebranding to Uncork Capital in 2017. Led by managing partners Jeff Clavier and Andy McLoughlin, the firm invests at the seed stage with a "first to believe" conviction style, typically targeting 10-15% ownership and writing seed checks broadly in the $1.5M-$4M range across B2B applications and SaaS, developer tooling, infrastructure and security, consumer and marketplaces, frontier tech/hardware, and AI/ML. In May 2025 the firm closed $300M in fresh capital across Uncork VIII (a $225M seed fund) and Uncork Plus IV (a $75M growth fund), bringing it to roughly $1.2B in assets under management. Across 275+ investments and 100+ outcomes, its portfolio and exits include SendGrid, Fitbit, Poshmark, Postmates, Eventbrite, LaunchDarkly, Tailscale, Front, Shippo, ClassDojo, Groq, Human Interest, Carrot Fertility, and GPTZero.

174 portfolio companies 174 publish APIs here 13 properties
Venture CapitalSeedDeveloper ToolsInfrastructureFintechArtificial IntelligenceSoftware-as-a-ServiceConsumerSan FranciscoUnited States
Portfolio Strength across 67 profiled portfolio companies on the network
13 top-rated API companies 5 exemplar · 8 strong
26 agent-ready companies 4 agent-native · 22 agent-ready
Average quality of the book:
Composite thin 39.5
Agent-Readiness agent-aware 24.7

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.

Uncork Capital has 174 portfolio companies tracked on the APIs.io network, of which 67 (39%) publish APIs indexed here. The remaining 107 are tracked as profiles without a published API on the network.

Its highest-rated API providers on the network are SendGrid, LaunchDarkly, Vidyard, Bitly, UserGems.

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 5 Complete, well-documented, and agent-ready
Strong 8 Solid coverage with minor gaps
Developing 23 Usable, with meaningful gaps to close
Thin 18 Limited public surface area
Emerging 11 Early or largely undocumented
Minimal 2 Almost no public developer surface

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

Providers
135
of 174 on the roster
Mean Kin Score
26.5
+2.1 vs catalog 24.4
Mean Agent Readiness
13.7
+1.0 vs catalog 12.7
Spread
2.5–80
median 20.9 · σ 18.7
How the 135 split by band
Exemplar 5Strong 8Developing 24Thin 19Emerging 48Minimal 31
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 33.8 27.2 +6.6 135
Operational Transparency 16.4 14.4 +2 135
Developer Ergonomics 25.6 23.8 +1.8 135
Discoverability 62.3 61.5 +0.8 135
Contract Quality 20.6 20.4 +0.2 135
Contract Governance 6.6 6.6 0 135

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) 15% 11% +4
MCP server (first-party) 20% 13% +7
Agent Skills 0% 0% 0
OAuth scopes 13% 12% +1
Security 91% 96% -5
Arazzo workflows 1% 2% -1
Governance rules 10% 13% -3

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 SendGrid 80
  2. 2 LaunchDarkly 77.9
  3. 3 Vidyard 69.4
  4. 4 Bitly 67.5
  5. 5 UserGems 67.4
  6. 6 Fitbit 65.4
  7. 7 Bem 60
  8. 8 Crossbeam 59.4
  9. 9 LiveRamp 58
  10. 10 MonetizeNow 56
Top by Agent Readiness
  1. 1 Bitly 60.6
  2. 2 UserGems 59.9
  3. 3 MonetizeNow 55.1
  4. 4 LaunchDarkly 54.1
  5. 5 Chariot 53.2
  6. 6 Common Paper 51.1
  7. 7 Flux 50.4
  8. 8 Crossbeam 48.4
  9. 9 DocSend 47.1
  10. 10 Messari 44.6
This roster declares 174 members; 172 resolve to a provider in the catalog and 135 carry a score (78%). 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: uncork-capital
name: Uncork Capital
description: >-
  Uncork Capital is a San Francisco-based seed-stage venture capital firm founded
  in 2004 by Jeff Clavier, who formalized his angel portfolio into one of Silicon
  Valley's earliest dedicated seed funds; it operated as SoftTech VC until
  rebranding to Uncork Capital in 2017. Led by managing partners Jeff Clavier and
  Andy McLoughlin, the firm invests at the seed stage with a "first to believe"
  conviction style, typically targeting 10-15% ownership and writing seed checks
  broadly in the $1.5M-$4M range across B2B applications and SaaS, developer
  tooling, infrastructure and security, consumer and marketplaces, frontier
  tech/hardware, and AI/ML. In May 2025 the firm closed $300M in fresh capital
  across Uncork VIII (a $225M seed fund) and Uncork Plus IV (a $75M growth fund),
  bringing it to roughly $1.2B in assets under management. Across 275+ investments
  and 100+ outcomes, its portfolio and exits include SendGrid, Fitbit, Poshmark,
  Postmates, Eventbrite, LaunchDarkly, Tailscale, Front, Shippo, ClassDojo, Groq,
  Human Interest, Carrot Fertility, and GPTZero.
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://uncorkcapital.com/favicon.ico
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
tags:
  - Venture Capital
  - Seed
  - Developer Tools
  - Infrastructure
  - Fintech
  - Artificial Intelligence
  - Software-as-a-Service
  - Consumer
  - San Francisco
  - United States
tags_raw:
  - Venture Capital
  - Seed
  - Developer Tools
  - Infrastructure
  - Fintech
  - Artificial Intelligence
  - SaaS
  - Consumer
  - San Francisco
  - United States
apis: []
common:
  - type: Website
    url: https://uncorkcapital.com
  - type: Portfolio
    url: https://uncorkcapital.com/companies/
  - type: Portfolio
    url: portfolio/uncork-capital-portfolio.yml
  - type: Team
    url: https://uncorkcapital.com/team/
  - type: Team
    url: team/uncork-capital-team.yml
  - type: InvestmentThesis
    url: https://uncorkcapital.com/approach/
  - type: Blog
    url: https://uncorkcapital.com/blog/
  - type: News
    url: https://uncorkcapital.com/news/
  - type: Jobs
    url: https://jobs.uncorkcapital.com
  - type: Pitch
    url: mailto:pitches@uncorkcapital.com
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/softtech-vc
  - type: LinkedIn
    url: https://www.linkedin.com/company/uncork-capital/
  - type: Twitter
    url: https://x.com/uncorkcap
  - type: Features
    data:
      - 'Stage: Seed (primary), with a Plus growth vehicle for breakout follow-on'
      - 'Typical check: $1.5M-$4M seed, targeting 10-15% ownership'
      - 'Sectors: B2B applications & SaaS, developer tooling / infrastructure & security, consumer & marketplaces, frontier tech/hardware, AI/ML'
      - 'Geography: primarily United States (Silicon Valley)'
      - 'AUM: ~$1.2B (2025, reported)'
      - 'Latest funds: Uncork VIII $225M seed + Uncork Plus IV $75M growth (May 2025, $300M total)'
      - 'Founded: 2004 (as SoftTech VC; renamed Uncork Capital 2017)'
      - 'Founders / partners: Jeff Clavier (Founder, Managing Partner), Andy McLoughlin (Managing Partner)'
      - 'HQ: San Francisco, CA'
      - 'Track record: 275+ investments, 100+ outcomes, ~$59B enterprise value'
    sources:
      - https://en.wikipedia.org/wiki/Uncork_Capital
      - https://uncorkcapital.com
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: https://apisjson.org
  - FN: Uncork Capital
    url: https://uncorkcapital.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/uncork-capital"
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 form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

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