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 174 profiled portfolio companies on the network
10 top-rated API companies 6 exemplar · 4 strong
24 agent-ready companies 4 agent-native · 20 agent-ready
Average quality of the book:
Composite emerging 21.6
Agent-Readiness human-only 9.8

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 174 (100%) publish APIs indexed here.

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

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 4 Solid coverage with minor gaps
Developing 25 Usable, with meaningful gaps to close
Thin 22 Limited public surface area
Emerging 52 Early or largely undocumented
Minimal 65 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 174 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
174
all scored
Mean Kin Score
21.5
+0.8 vs catalog 20.7
Mean Agent Readiness
9.7
even vs catalog 9.7
Spread
0–77
median 13.8 · σ 18.3
How the 174 split by band
Exemplar 5Strong 7Developing 24Thin 19Emerging 54Minimal 65
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 26 22.3 +3.7 174
Developer Ergonomics 19.3 17.9 +1.4 174
Operational Transparency 12 11.3 +0.7 174
Contract Governance 6.3 6.4 -0.1 174
Discoverability 60 60.4 -0.4 174
Contract Quality 16.2 17.5 -1.3 174

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) 20% 16% +4
MCP server (first-party) 12% 7% +5
Agent Skills 0% 0% 0
OAuth scopes 10% 9% +1
Security 81% 88% -7
Arazzo workflows 1% 2% -1
Governance rules 9% 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 SendGrid 77
  2. 2 UserGems 71.6
  3. 3 Vidyard 68.8
  4. 4 Bitly 68
  5. 5 Fitbit 67.6
  6. 6 Crossbeam 60.7
  7. 7 LiveRamp 59.1
  8. 8 MonetizeNow 58
  9. 9 VigLink (Sovrn Commerce) 56.1
  10. 10 GPTZero 55.8
Top by Agent Readiness
  1. 1 MonetizeNow 58.6
  2. 2 Chariot 55.8
  3. 3 UserGems 54.7
  4. 4 Crossbeam 48.4
  5. 5 DocSend 47.1
  6. 6 Bitly 41.4
  7. 7 LiveRamp 41.4
  8. 8 SendGrid 41.2
  9. 9 VigLink (Sovrn Commerce) 39.4
  10. 10 Bem 39.2
All 174 members of this roster resolve to a scored provider in the catalog.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: 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

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