What are some alternatives?
When comparing Optiv Security Intelligence and Sophos UTM, you can also consider the following products
Symantec Email Security.cloud - Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats
Alert Logic Threat Manager - Alert Logic Threat Manager is a cloud-based managed intrusion detection and vulnerability assessment solution.
Cylance - Cylance is an endpoint security platform that detects, prevents and blocks threats.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more