aid: castelion
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/castelion.png
name: Castelion
description: >-
  Castelion is a vertically integrated defense technology company that designs,
  tests, and manufactures next-generation military systems, with a focus on
  affordable, mass-producible hypersonic strike weapons such as its Blackbeard
  system, built rapidly and at scale to deter future conflict. Founded by former
  SpaceX and defense-industry engineers, it operates manufacturing and test
  facilities in Torrance, CA; Rio Rancho, NM; Midland, TX; and Allen, TX.
  Castelion is privately held and backed by Andreessen Horowitz (a16z), General
  Catalyst, and Lightspeed Venture Partners. It publishes no public API,
  developer portal, or technical documentation; this API Evangelist profile
  tracks it as a company in the network.
url: https://raw.githubusercontent.com/api-evangelist/castelion/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- general-catalyst
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Defense
- Aerospace
- Hypersonics
- Manufacturing
- Weapons Systems
- National Security
apis: []
common:
- type: DomainSecurity
  url: security/castelion-domain-security.yml
- type: Website
  url: https://www.castelion.com/
- type: TermsOfService
  url: https://www.castelion.com/terms-conditions/
- type: PrivacyPolicy
  url: https://www.castelion.com/privacy-policy/
- type: Blog
  url: https://www.castelion.com/news/
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