Mimecast Web Security Review - Features, Pricing & Alternatives (2026)

Mimecast Web Security

Cloud-based DNS-level web protection that blocks malware and enforces acceptable use policies

Security & IT Cybersecurity www.mimecast.com

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Founded

2003

Starting Price

Custom

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