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 66 profiled portfolio companies on the network
11 top-rated API companies 5 exemplar · 6 strong
23 agent-ready companies 3 agent-native · 20 agent-ready
Average quality of the book:
Composite thin 39.1
Agent-Readiness agent-aware 23.5

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.

Uncork Capital has 174 portfolio companies tracked on the APIs.io network, of which 66 (38%) publish APIs indexed here. The remaining 108 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
SendGrid44 published contracts82.9LaunchDarkly3 published contracts80.8Vidyard3 APIs71.5Bitly2 published contracts70.4UserGems1 published contract70.1
Strong 6 Solid coverage with minor gaps
Bem1 published contract65.8Crossbeam1 API62.7LiveRamp5 published contracts60.6Fitbit11 published contracts60.1Viglink8 published contracts58.5Nuon2 published contracts55.8
Developing 25 Usable, with meaningful gaps to close
LiquiDonate2 published contracts54.2Mob.ly4 published contracts53.1MonetizeNow1 published contract51.8Lunar3 published contracts50.7Front4 published contracts50.4Shippo1 published contract50.1Torii1 published contract49.9GPTZero1 published contract49.2DocSend1 API48.5Chariot3 published contracts47.4Common Paper1 API45.0Clever2 published contracts44.7Chartbeat5 APIs44.4Coder1 published contract44.1Arch1 published contract43.9Kongregate1 published contract43.9Overflow2 published contracts43.9Curse1 published contract43.2Gamma1 API42.6Unkey1 published contract42.2Human Interest1 API40.0Memfault1 published contract40.0Vungle4 APIs39.7Mutiny1 API39.6Anything2 published contracts39.4
Thin 17 Limited public surface area
Tailscale1 published contract39.1DroneDeploy7 APIs38.1Oxen2 published contracts36.7Eventbrite1 published contract36.0Handshake1 API36.0Qpoint1 API36.0Accredible1 published contract35.3Craft2 APIs34.5Groq1 published contract33.0Numeral1 published contract32.4Groove1 published contract32.1Unison Computing1 API31.9Alchemy12 APIs30.1Yuhu1 API29.0Messari1 published contract28.1Brand.ai1 API26.4Postmates2 APIs26.2
Emerging 10 Early or largely undocumented
DNAnexus1 published contract26.0Ohloh1 API25.5Inscribe1 API22.9MonkeyLearn1 API22.7Wyvern1 API21.9Looking Glass2 APIs21.1Mirai1 API20.2Tulip Retail1 API16.2True&Co1 API15.8Poka1 API13.6
Minimal 3 Almost no public developer surface
Loft Orbital1 API10.9Blink1 published contract9.3Songkick1 API5.6

Properties

Portfolio

Where the firm publishes its investments

Portfolio
Portfolio
 Portfolio
Portfolio
 InvestmentThesis
InvestmentThesis

Team

Partners and investing staff

Team
Team
 Team
Team

Content

Blog, podcast, newsletter, and research

Blog
Blog
 News
News

Firm

The firm itself

Website
Website
 Jobs
Jobs
 Crunchbase
Crunchbase
 LinkedIn
LinkedIn
 Twitter
Twitter

Other

Everything else declared in apis.yml

Pitch
Pitch

Cohort brief

Auto-generated

The 137 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
137
of 174 on the roster
Mean Kin Score
25.2
+2.3 vs catalog 22.9
Mean Agent Readiness
13.1
+1.1 vs catalog 12
Spread
0–82.9
median 19.7 · σ 19.3
How the 137 split by band
Exemplar 5Strong 6Developing 25Thin 19Emerging 45Minimal 37
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 32.6 26.4 +6.2 137
Operational Transparency 15.8 13.6 +2.2 137
Developer Ergonomics 24.9 23.1 +1.8 137
Contract Governance 6.4 6.3 +0.1 137
Contract Quality 17.6 17.6 0 137
Discoverability 58 58.2 -0.2 137

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) 24% 15% +9
MCP server (first-party) 22% 12% +10
Agent Skills 0% 0% 0
OAuth scopes 13% 11% +2
Security 97% 98% -1
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 82.9
  2. 2 LaunchDarkly 80.8
  3. 3 Vidyard 71.5
  4. 4 Bitly 70.4
  5. 5 UserGems 70.1
  6. 6 Crossbeam 62.7
  7. 7 LiveRamp 60.6
  8. 8 Bem 60.1
  9. 9 Fitbit 60.1
  10. 10 VigLink (Sovrn Commerce) 56.4
Top by Agent Readiness
  1. 1 Bitly 60.6
  2. 2 UserGems 59.9
  3. 3 MonetizeNow 55.1
  4. 4 LaunchDarkly 51.9
  5. 5 Common Paper 51.1
  6. 6 Chariot 51
  7. 7 DocSend 47.1
  8. 8 Crossbeam 46.3
  9. 9 LiveRamp 43.1
  10. 10 Messari 42.7
This roster declares 174 members; 171 resolve to a provider in the catalog and 137 carry a score (80%). The figures above describe the scored members only.
Coverage caveat. 118 of 137 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)

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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