Proofpoint Nexus

Proofpoint Nexus is the set of AI models built into Proofpoint's security products, such as its email security and account takeover protection; it is not sold as its own separate tool. Nexus combines four parts: a language model, a relationship graph that studies who normally talks to whom, computer vision to scan images and QR codes, and a threat intelligence feed. Together these catch phishing, business email compromise, and fraud attempts across email, Microsoft Teams, Slack, and supplier messages. Proofpoint says its models process over two trillion emails a year and track more than 100 known threat actor groups. Because Nexus is embedded, you buy it as part of whichever Proofpoint product you choose.

This matters most as a reason to pick Proofpoint's email and threat protection products, since it is not something you buy on its own. It fits a company worried about business email compromise and fraud aimed at finance and HR staff. A good starting point is Proofpoint's core email security tier, where Nexus detection is already built in. Pricing is not public; it depends on which Proofpoint product you pick and how many mailboxes you cover, so treat any online estimate as a rough planning number and get a real quote from Proofpoint or a reseller. One risk: Nexus spans many Proofpoint products, so figuring out which features are in a given quote takes some digging. Ask your rep for a feature-by-tier breakdown before you sign.