Katango

Katango was a Palo Alto, California mobile software startup whose smartphone app automatically organized a user's phone and social contacts into intelligent groups (circles) using clustering algorithms, so people could share and message the right subset of friends without manually building lists. The company was backed by Kleiner Perkins Caufield & Byers (through its sFund social initiative) and was acquired by Google in November 2011, with the team joining Google to work on the Google+ Circles experience. The standalone product was discontinued after the acquisition. This API Evangelist profile was created as a Kleiner Perkins portfolio lead; enrichment confirms the company is defunct with no public developer surface, API, or documentation. The katango.com domain now resolves to Google-owned infrastructure with no live site.

Katango is profiled on the APIs.io network. Tagged areas include Company, Consumer, Mobile, Social, and Contacts.

🌐 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

CompanyConsumerMobileSocialContactsDefunctAcquiredGoogleKleiner Perkins

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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/katango: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Source (apis.yml)

aid: katango
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/katango.png
name: Katango
description: Katango was a Palo Alto, California mobile software startup whose smartphone app automatically organized a user's
  phone and social contacts into intelligent groups (circles) using clustering algorithms, so people could share and message
  the right subset of friends without manually building lists. The company was backed by Kleiner Perkins Caufield & Byers
  (through its sFund social initiative) and was acquired by Google in November 2011, with the team joining Google to work
  on the Google+ Circles experience. The standalone product was discontinued after the acquisition. This API Evangelist profile
  was created as a Kleiner Perkins portfolio lead; enrichment confirms the company is defunct with no public developer surface,
  API, or documentation. The katango.com domain now resolves to Google-owned infrastructure with no live site.
url: https://raw.githubusercontent.com/api-evangelist/katango/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kleiner-perkins
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-reason: acquired-by-google-2011
x-acquired-by: google
x-enrichment-outcome: 'no-developer-surface: no API, docs, SDKs, MCP, or live site; katango.com resolves to Google-owned IP
  (142.250.191.14) with no valid TLS certificate for the host.'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Consumer
- Mobile
- Social
- Contacts
- Defunct
- Acquired
- Google
- Kleiner Perkins
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence