aid: citadel
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/citadel.png
name: Citadel
description: Citadel (also branded Citadel Defense / Drone Citadel) is a counter-unmanned-aircraft-system
  (C-UAS) company founded in 2016 that built an automated, modular drone-defense solution using proprietary
  machine-learning algorithms to detect, classify, and defeat unauthorized drones. It raised a Lightspeed
  Venture Partners Series A in 2017 and was subsequently acquired by BlueHalo. The company operates no
  public developer portal, API, SDK, or documentation surface, and its standalone domains (citadeldefense.com,
  dronecitadel.com) are now parked or no longer resolve.
url: https://raw.githubusercontent.com/api-evangelist/citadel/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: bluehalo
x-enrichment-note: 'Enrichment pass 2026-07-18: counter-UAS defense hardware provider; no public API/developer
  surface exists. Standalone domains parked (citadeldefense.com) or unresolvable (dronecitadel.com). No
  artifacts producible without fabrication.'
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Defense
- Counter-UAS
- Drones
- Machine Learning
- Security
- Hardware
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