DOSarrest vs Gatekeeper: side-by-side comparison (2026)

DOSarrest: DDoS protection firm acquired by Link11 GmbH in Jan 2021. Built by DOSarrest.

Gatekeeper: An open source DDoS protection system that uses distributed algorithms to defend against multi-vector attacks and scale to handle varying bandwidth requirements for network operators and service providers.

The table above shows where their features, integrations, deployment and company size fit differ.

DOSarrest is made by DOSarrest. Gatekeeper is open-source with 1,591 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. DOSarrest and Gatekeeper are both DDoS Mitigation products, and both cover DDoS, Network Protection, Mitigation. Key differences: DOSarrest is Commercial while Gatekeeper is Free, Gatekeeper is open-source. Use the table above to see where features, deployment and company size fit differ.