Defense.net

Defense.Net was a cloud DDoS-mitigation company founded in 2012 by Barrett Lyon (also the founder of Prolexic, the original DDoS-mitigation provider). It operated a global constellation of scrubbing/mitigation sites that filtered distributed-denial-of-service attacks against Internet-facing infrastructure in real time. Bessemer Venture Partners led a $9.5M Series A in 2012. In May 2014 the company was acquired by F5 Networks and folded into the F5 Silverline DDoS Protection managed service. Defense.Net no longer operates as an independent business: the defense.net domain now returns an HTTP 301 redirect to the F5 Silverline product page, and there is no independent developer portal, public API, documentation, or SDK surface to enrich. This profile is retained as a historical company record in the API Evangelist network.

Defense.net is profiled on the APIs.io network. Tagged areas include Company, Cybersecurity, DDoS, DDoS Mitigation, and Network Security.

🌐 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

CompanyCybersecurityDDoSDDoS MitigationNetwork SecurityCloud SecurityAcquired

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

Website

Website

Crunchbase

Crunchbase

Other 1

Properties that don't map to a standard resource type

SuccessorProduct

SuccessorProduct

Source (apis.yml)

aid: defensenet
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/defensenet.png
name: Defense.net
description: 'Defense.Net was a cloud DDoS-mitigation company founded in 2012 by Barrett Lyon (also the founder of Prolexic,
  the original DDoS-mitigation provider). It operated a global constellation of scrubbing/mitigation sites that filtered distributed-denial-of-service
  attacks against Internet-facing infrastructure in real time. Bessemer Venture Partners led a $9.5M Series A in 2012. In
  May 2014 the company was acquired by F5 Networks and folded into the F5 Silverline DDoS Protection managed service. Defense.Net
  no longer operates as an independent business: the defense.net domain now returns an HTTP 301 redirect to the F5 Silverline
  product page, and there is no independent developer portal, public API, documentation, or SDK surface to enrich. This profile
  is retained as a historical company record in the API Evangelist network.'
url: https://raw.githubusercontent.com/api-evangelist/defensenet/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bessemer-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: f5-networks
x-acquired-date: 2014-05
x-successor-product: F5 Silverline DDoS Protection
x-founded: '2012'
x-founder: Barrett Lyon
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Cybersecurity
- DDoS
- DDoS Mitigation
- Network Security
- Cloud Security
- Acquired
apis: []
common:
- type: Website
  url: https://defense.net
- type: SuccessorProduct
  name: F5 Silverline DDoS Protection
  url: https://www.f5.com/products/platforms/silverline/f5-silverline-ddos-protection
- type: Crunchbase
  url: https://www.bvp.com/companies/defense-net
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