Citadel

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.

Citadel is profiled on the APIs.io network. Tagged areas include Company, Defense, Counter-UAS, Drones, and Machine Learning.

📡 Source on GitHub

0 APIs

Company Defense Counter-UAS Drones Machine Learning Security Hardware

Source (apis.yml)

aid: citadel
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://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: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Defense
- Counter-UAS
- Drones
- Machine Learning
- Security
- Hardware
tags_raw:
- Company
- Defense
- Counter-UAS
- Drones
- Machine Learning
- Security
- Hardware
- Machine-Learning
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

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