What are some alternatives?
When comparing Optiv Security Intelligence and Symantec Web Security.cloud, 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.
Sophos UTM - Sophos UTM integrates complete security software within a single appliance.
Cylance - Cylance is an endpoint security platform that detects, prevents and blocks threats.