10 best Proofpoint alternatives for 2026

Email security has significantly evolved, yet many existing secure email gateways like Proofpoint struggle to address modern threats such as business email compromise, vendor impersonation, and AI-driven social engineering. These challenges have prompted organizations to seek alternatives that offer greater adaptability, transparency, and lower operational demands. Key features to consider in a Proofpoint alternative include clear detection logic, protection against sophisticated social engineering tactics, rapid adaptation to evolving threats, automation that eases analyst workloads, seamless SOC integration, flexible deployment, and effective false positive management. Sublime Security emerges as a leading contender due to its environment-specific detection, explainable actions, and autonomous triage, which together enhance detection coverage and reduce manual efforts. Other notable competitors such as Abnormal Security, Mimecast, Microsoft Defender for Office 365, and Google Workspace Security also provide varied solutions that cater to specific organizational needs and compliance requirements.