When does building DDoS protection make sense?

The meaningful 'build' contribution is detection logic, traffic analysis, and incident runbooks layered on top of provider infrastructure. Actual mitigation capacity — the ability to absorb terabit-scale attacks — is always sourced from a network provider, not built internally.

When does buying DDoS protection make sense?

Always. Cloudflare includes unmetered L3/L4 mitigation on its free plan for most organizations. AWS Shield Standard is included for AWS workloads. The practical question is which tier of paid protection matches your SLA and response requirements.

What are the main DDoS protection vendors?

Representative vendors include Akamai Prolexic, AWS Shield, Cloudflare, Imperva DDoS Protection. B4 Pro scores the full set.

What is the difference between L3/L4 and L7 DDoS attacks?

L3/L4 attacks target the network and transport layers with volumetric flooding — raw packet volume measured in gigabits or terabits. L7 attacks target the application layer with requests that look legitimate individually but exhaust server resources collectively. Both require different mitigation techniques, and most modern DDoS services cover both.

Security & Compliance · Engineering, IT & AI

Should you build or buy DDoS Protection?

DDoS protection services absorb and mitigate distributed denial-of-service attacks that attempt to overwhelm applications, networks, or infrastructure with volumetric traffic. They operate via globally distributed anycast scrubbing networks, BGP-based traffic rerouting, and application-layer rate limiting to distinguish attack traffic from legitimate requests at scale.

The build-vs-buy decision for DDoS protection is almost entirely a network infrastructure question — whether you have access to globally distributed anycast capacity measured in terabits — rather than a software development question; the specifics of your attack surface and availability requirements decide which tier of protection makes sense.

Domain: Security & Compliance
Function: Engineering, IT & AI
Industries: Cross-industry

Last assessed June 2026 · re-scored quarterly via The Continuum.

Build it, buy it, or bridge?

	Build it	Buy it	Bridge (buy, then extend)
Cost shape	Appliance capex plus staffing; single large scrub can cost 10x your server bill; on-prem structurally fails at terabit floods	Cloudflare unmetered L3/L4 mitigation bundled free; AWS Shield Standard included; advanced tiers for SLA-backed response	CDN for commodity protection; dedicated scrubbing service for SLA-critical applications
Time to value	Hardware deployed in weeks; detection logic takes months; ineffective against volumetric attacks beyond transit capacity	Cloudflare protection active on DNS cutover in minutes; Akamai/AWS Shield immediate for existing customers	CDN protection immediate; dedicated scrubbing service configured in days
Differentiation captured	Detection logic and runbooks are genuinely custom; mitigation capacity is always sourced from a provider	Global anycast capacity and BGP scrubbing center relationships at terabit scale	Custom detection and runbooks on provider infrastructure
AI feasibility today	Detection and alerting logic is buildable; terabit-scale mitigation capacity is not; this is an infrastructure problem, not a software problem	Azure neutralized a 15.72 Tbps attack; Cloudflare absorbs attacks that would saturate any private transit	Build detection layer; buy the network capacity layer underneath it
Who it fits	No realistic profile for full mitigation; custom detection and runbooks for any team on top of provider capacity	Every organization with availability requirements; Cloudflare free tier covers the baseline for most	High-availability applications with custom traffic profiles on CDN infrastructure

The B4 call

B4 has a verdict for DDoS Protection.

Build, Buy, Bridge, or Beware, with the five-dimension scorecard and the reasoning behind it. Unlock the call, and every other category, with B4 Pro.

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When building DDoS Protection makes sense

The 'build' contribution in DDoS protection is limited to the layer that sits on top of provider infrastructure: detection logic, traffic analysis, alerting, and incident runbooks. These are real engineering tasks and worth doing well. Organizations can build sophisticated traffic anomaly detection, configure BGP Flowspec rules on carrier infrastructure, and create automated response playbooks that escalate intelligently. What no team builds is the underlying mitigation capacity. Absorbing a volumetric attack measured in terabits requires a globally distributed anycast network with scrubbing centers in dozens of regions and carrier-level BGP relationships to null-route attack traffic before it hits your infrastructure. Azure documented neutralizing a 15.72 terabit attack using its own global infrastructure. That scale of capacity is not provisioned by engineering teams building internal solutions — it's always sourced from a provider, even for the most infrastructure-sophisticated organizations in the world.

When buying DDoS Protection makes sense

Buying DDoS protection is the universal default because the underlying mitigation problem is a network infrastructure problem, not a software problem. At the commodity tier, Cloudflare includes unmetered L3/L4 mitigation on its free plan — most organizations get the baseline DDoS protection they need as part of a CDN relationship they're already paying for. AWS Shield Standard is included at no extra cost for workloads on AWS. The question for most teams is which tier of paid service makes sense for their availability requirements: Akamai Prolexic and Imperva provide scrubbing capacity and SLA-backed response for applications where downtime is costly. AWS Shield Advanced covers the SLA guarantee and cost protection for applications on AWS infrastructure. The practical decision is about the SLA and response commitment, not about whether to buy.

DDoS protection is almost entirely a network infrastructure problem, not a software problem. Absorbing volumetric attacks at scale requires globally distributed anycast capacity and carrier-level BGP relationships that no engineering team provisions on its own. At the commodity tier, Cloudflare includes unmetered L3/L4 mitigation on its free plan, which means the baseline protection most companies need costs nothing beyond their existing CDN relationship.

Buying earns its keep at every meaningful scale of attack. AWS Shield Advanced, Akamai Prolexic, and Radware provide the scrubbing capacity and SLA-backed response that matter when you're facing a sustained volumetric attack measured in terabits. The build question rarely applies here in the traditional sense. What teams actually build is the detection logic, alerting, and runbooks layered on top of provider infrastructure. The underlying mitigation capacity is always bought.

Representative vendors

CloudflareAWS Shield and 3 more, scored in B4 Pro

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Frequently asked

What is DDoS protection?: DDoS protection services absorb and mitigate distributed denial-of-service attacks that attempt to overwhelm applications or infrastructure with volumetric traffic. They operate via globally distributed anycast scrubbing networks, BGP-based traffic rerouting, and application-layer rate limiting to separate attack traffic from legitimate requests.
When does building DDoS protection make sense?: The meaningful 'build' contribution is detection logic, traffic analysis, and incident runbooks layered on top of provider infrastructure. Actual mitigation capacity — the ability to absorb terabit-scale attacks — is always sourced from a network provider, not built internally.
When does buying DDoS protection make sense?: Always. Cloudflare includes unmetered L3/L4 mitigation on its free plan for most organizations. AWS Shield Standard is included for AWS workloads. The practical question is which tier of paid protection matches your SLA and response requirements.
What are the main DDoS protection vendors?: Representative vendors include Akamai Prolexic, AWS Shield, Cloudflare, Imperva DDoS Protection. B4 Pro scores the full set.
What is the difference between L3/L4 and L7 DDoS attacks?: L3/L4 attacks target the network and transport layers with volumetric flooding — raw packet volume measured in gigabits or terabits. L7 attacks target the application layer with requests that look legitimate individually but exhaust server resources collectively. Both require different mitigation techniques, and most modern DDoS services cover both.

The B4 Index scores every software category on two axes, strategic differentiation and AI feasibility, to classify it Build, Buy, Bridge, or Beware. See the full methodology.

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