Ark.com

Ark.com was a people search engine founded in San Francisco in March 2012 by Patrick Riley and Yiming Liu, and part of Y Combinator's Winter 2012 batch. Ark indexed over a billion public social network profiles — aggregating "ghost profiles" from Facebook, LinkedIn, AngelList and other networks — and let users search across them with filters such as hometown, current city, high school, college, employer and interests, to reconnect with classmates and acquaintances or find new business contacts. The company raised a $4.2M seed round in April 2012 from Andreessen Horowitz, Greylock Partners and SV Angel, and reached the finals of TechCrunch Disrupt NYC 2012. Ark is no longer operating: Y Combinator lists the company as Inactive and PitchBook lists it as Out of Business. As of a July 2026 probe the ark.com domain no longer serves the company — it redirects to www.ark-invest.com, the unrelated ARK Investment Management site — and no api., developer. or docs. subdomain resolves. Ark never published a public API, developer portal or SDKs, so there is no API surface to catalog. Retained as a historical a16z portfolio record only.

Ark.com is profiled on the APIs.io network. Tagged areas include Company, Defunct, People Search, Social Search, and Search Engine.

🌐 Visit website 📡 Source on GitHub

6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyDefunctPeople SearchSocial SearchSearch EngineData AggregationY CombinatorVenture Backed

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 6.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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Resources

Company 2

The organization behind the API

CrunchBase

CrunchBase

LinkedIn

Other 1

Properties that don't map to a standard resource type

Wikipedia

Wikipedia

Source (apis.yml)

aid: arkcom
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/arkcom.png
name: Ark.com
description: 'Ark.com was a people search engine founded in San Francisco in March 2012 by Patrick Riley and Yiming Liu, and
  part of Y Combinator''s Winter 2012 batch. Ark indexed over a billion public social network profiles — aggregating "ghost
  profiles" from Facebook, LinkedIn, AngelList and other networks — and let users search across them with filters such as
  hometown, current city, high school, college, employer and interests, to reconnect with classmates and acquaintances or
  find new business contacts. The company raised a $4.2M seed round in April 2012 from Andreessen Horowitz, Greylock Partners
  and SV Angel, and reached the finals of TechCrunch Disrupt NYC 2012. Ark is no longer operating: Y Combinator lists the
  company as Inactive and PitchBook lists it as Out of Business. As of a July 2026 probe the ark.com domain no longer serves
  the company — it redirects to www.ark-invest.com, the unrelated ARK Investment Management site — and no api., developer.
  or docs. subdomain resolves. Ark never published a public API, developer portal or SDKs, so there is no API surface to catalog.
  Retained as a historical a16z portfolio record only.'
url: https://raw.githubusercontent.com/api-evangelist/arkcom/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- Greylock Partners
- SV Angel
x-tier: stub
x-tier-reason: defunct-no-api-surface
x-status: defunct
x-status-evidence:
- 'Y Combinator company profile lists Ark (W12) as Inactive: https://www.ycombinator.com/companies/ark'
- 'PitchBook company profile lists Ark.com as Out of Business: https://pitchbook.com/profiles/company/54329-32'
- 'Probe 2026-07-19: http://ark.com redirects to https://www.ark-invest.com/ (unrelated company, ARK Investment Management);
  https://ark.com times out; api./developer./docs./www.ark.com do not resolve; /.well-known/security.txt, /llms.txt and /.well-known/api-catalog
  all 404 on the redirect target.'
x-founded: 2012-03
x-founders:
- Patrick Riley
- Yiming Liu
x-accelerator: Y Combinator W12
x-disambiguation: 'Not to be confused with: ARK Investment Management (ark-funds.com / ark-invest.com), which now controls
  the ark.com redirect; the ARK Ecosystem blockchain (ark.io / ark.dev); or AI Ark (ai-ark.com), a separate B2B data enrichment
  API vendor.'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Defunct
- People Search
- Social Search
- Search Engine
- Data Aggregation
- Y Combinator
- Venture Backed
apis: []
common:
- type: Wikipedia
  url: https://en.wikipedia.org/wiki/Ark_(search_engine)
- type: CrunchBase
  url: https://www.crunchbase.com/organization/ark
- type: LinkedIn
  url: https://www.linkedin.com/company/ark.com
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: nochange
  artifacts_added: 0
  pass: local-v1
  note: Company is defunct with no live site and no API surface; identity researched and recorded, no artifacts applicable.