Mimecast Web Security
Cloud-based DNS-level web protection that blocks malware and enforces acceptable use policies
Founded
2003
Starting Price
Custom
Category
Security & IT
Last updated March 26, 2026
About Mimecast Web Security
Mimecast Web Security is a cloud-based web security service that protects organizations at the DNS level by filtering and monitoring web traffic to guard against malware, phishing, and malicious websites. It uses a dynamic proxy to inspect DNS requests and apply anti-virus scanning, SSL inspection, URL categorization, and static file analysis. The service integrates with Mimecast Email Security for unified threat protection across the two largest attack vectors, and provides visibility and reporting into web activity across the organization.
Pros & Cons
Pros
- Quick setup that can be accomplished in 30-40 minutes with straightforward DNS configuration
- Effective threat detection that blocks phishing and malware at the DNS layer before reaching endpoints
- Seamless integration with Mimecast Email Security reduces complexity of managing two separate security tools
- Comprehensive reporting provides clear visibility into web activity and threats across the organization
- Protects remote workers and guest Wi-Fi networks with consistent policies regardless of location
Key Features
DNS-Level Threat Protection
Blocks malicious websites and malware at the DNS layer before content reaches the endpoint, providing proactive defense
URL Categorization & Filtering
Filter web access by category to enforce acceptable use policies and block inappropriate or risky content
SSL Inspection
Inspect encrypted HTTPS traffic to detect threats hidden within SSL/TLS connections
Anti-Virus Scanning
Scan web downloads and content in real-time for viruses, trojans, and other malware threats
Shadow IT Mitigation
Identify and control unauthorized cloud applications and services being used across the organization
Guest Wi-Fi Protection
Extend web security policies to guest Wi-Fi networks to protect visitors and prevent network abuse
Email Security Integration
Seamlessly integrates with Mimecast Email Security for consistent protection across email and web threat vectors
Pricing
Custom
Custom/user/year
- DNS-level web protection
- URL categorization and filtering
- SSL inspection
- Anti-virus scanning
- Shadow IT detection
Best For
Enterprise Web Threat Protection
Large organizations deploy Mimecast Web Security to protect thousands of endpoints from web-based malware, phishing, and drive-by downloads at the DNS layer
Unified Email & Web Security
Companies already using Mimecast Email Security add Web Security for consistent threat protection across both email and web attack vectors from a single vendor
Acceptable Use Policy Enforcement
IT teams enforce corporate acceptable use policies by blocking access to inappropriate website categories and controlling shadow IT applications
Remote Workforce Protection
Organizations with distributed teams extend DNS-level web protection to remote workers regardless of their physical location or network
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