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

5.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Cybersecurity DDoSDDoS MitigationNetwork Security Cloud Security Acquired

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 5.0/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/defensenet: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Resources

Company 2

The organization behind the API

Website

Website

Crunchbase

Crunchbase

Other 2

Properties that don't map to a standard resource type

ParentCompany

ParentCompany

SuccessorProduct

SuccessorProduct

Source (apis.yml)

aid: defensenet
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/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: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Cybersecurity
- DDoS
- DDoS Mitigation
- Network Security
- Cloud Security
- Acquired
apis: []
common:
- type: ParentCompany
  url: https://apis.io/providers/f5-networks/
  name: F5 Networks
  x-relationship: acquired
  x-evidence: In May 2014 the company was acquired by F5 Networks and folded into the F5 Silverline DDoS Protection managed
    service.
- 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

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