Based on this product's specifications, here are some alternatives and similar models
Software license EXTREME 39521 — Defender for up to 10 end systems
Summary description:
License for EXTREME Networks model 39521 enabling Defender functionality on up to 10 end systems. Provides authorized activation for the specified number of endpoints and is intended for use with compatible Extreme Networks platforms. Suited for managing security or access features across a small group of devices, it simplifies deployment, centralized licensing tracking and ensures authorized protection for those endpoints.