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.
Build it, buy it, or bridge?
When building 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 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.
The desk read
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.
Vendors in DDoS Protection
Each file covers what the product is, its funding history, and when the index last verified it alive.
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.