DOSarrest vs Gatekeeper: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
DOSarrest is a commercial distributed denial of service mitigation tool by DOSarrest. Gatekeeper is a free distributed denial of service mitigation tool. Compare features, ratings, integrations, and community reviews side by side to find the best distributed denial of service mitigation fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, company size fit, deployment model, here is our conclusion:
Mid-market and enterprise teams defending against sustained volumetric attacks will find DOSarrest valuable for its always-on cloud scrubbing architecture, which absorbs traffic before it reaches your perimeter. The tool aligns to NIST PR.IR by embedding DDoS resilience into your infrastructure layer rather than bolting it on after breach detection fails. Skip this if you need integrated WAF or bot management; DOSarrest focuses on the pipe itself and leaves application-layer threats to other tools.
Network operators and service providers facing multi-vector DDoS attacks will find Gatekeeper's distributed algorithm approach valuable because it actually scales with your bandwidth requirements instead of hitting throughput walls like centralized scrubbing centers do. The open source model with 1,591 GitHub stars means you're not locked into vendor infrastructure, and deployment across your own edge nodes gives you detection latency measured in milliseconds rather than the round-trip delays of cloud mitigation services. Skip this if your primary concern is stopping Layer 7 application attacks; Gatekeeper prioritizes network-layer volumetric defense, leaving sophisticated HTTP floods to separate WAF tooling.
