This comparison sheet contrasts Proofpoint’s ETPro and community-driven ETOpen intrusion detection rulesets. ETPro, with over 71,500 signatures and 30–50 daily updates, benefits from Proofpoint’s global sensor network, malware detonations, and dedicated research teams. In contrast, ETOpen has 28,500 signatures and slower update cycles, relying mainly on community contributions. ETPro offers broader coverage, MAPP integration, SLA-backed support, and full QA, making it suitable for enterprise-grade threat detection. ETOpen, while useful for general visibility, lacks the depth, timeliness, and dedicated threat research of ETPro, positioning ETPro as the premium option for advanced cyber defense.

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