

Mimecast Advanced Email Security and Microsoft Defender for Office 365 compete in the email security market. Users generally favor Microsoft Defender for its integration with Office 365 and cost-effectiveness.
Features: Mimecast is praised for its sandboxing, archiving, and advanced threat protection capabilities, handling suspicious emails and attachments effectively. Microsoft Defender for Office 365 offers anti-phishing, Safe Links, and Safe Attachments with strong integration across Microsoft products, ensuring comprehensive threat visibility.
Room for Improvement: Mimecast could enhance customer support, admin interfaces, and email handling flexibility, with some users desiring better phishing detection. Microsoft Defender's pricing model and configuration complexity have been critiqued, with calls for improved user accessibility and alerting systems.
Ease of Deployment and Customer Service: Both solutions support versatile cloud deployments. Mimecast's setup can be complex, often requiring extensive support, with customer service hinging on knowledge bases. Microsoft Defender benefits from seamless deployment in Microsoft's ecosystem, although customer support could offer more proactive guidance.
Pricing and ROI: Mimecast, known for its higher pricing, delivers robust security features but faces criticism for additional fees. Microsoft Defender, bundled with Office 365 licenses, provides significant value, with easier cost justification for organizations integrated into the Microsoft ecosystem.
It has also decreased our time to detection and response by about 15 to 20 percent.
Overall, cost of owning and operating our system goes down.
It's hard to quantify the return on investment we've seen from Microsoft Defender for Office 365.
There is definitely a return on investment when using Mimecast, as it blocks phishing emails, reducing the risk of significant financial losses.
Over the past two years, there have been no critical problems.
we opened tickets, and they typically resolve them quickly.
With a subscription for Microsoft Defender for Office 365, it is an eight. Without it, it is a six.
Support personnel are hesitant to engage in remote sessions, preferring to share documentation via email.
Mimecast technical support is generally quite good.
I would rate my experience with technical support of Mimecast Email Security between seven and eight out of ten for their support.
We have never faced scalability problems, and Microsoft manages it effectively.
Microsoft Defender for Office 365 scales transparently for us, as we grew from 1,000 users to 3,000 users, and we didn't notice much difference.
Microsoft Defender for Office 365 scales with the growing needs of my company well.
If Mimecast Email Security introduces API solutions, it will dominate the market.
From what I've seen from the MSP, it seems quite complicated to manage the configuration itself.
I would rate the stability of Microsoft Defender for Office 365 as 10 over 10 because it's highly available, it works, and it does the job it is meant to do.
I have not experienced any downtime, crashes, or performance issues because of Defender.
The solution is stable, as we have been using it for the past two years.
They confirm it's a good solution where only one or two rare emails get through, while the rest are properly blocked without any issues.
The issues we did have were causing quite a lot of problems.
The main area for improvement is simplifying the implementation and rollout process.
Microsoft could improve by offering recommendations for domain spoofing attacks, especially scenarios where DNS records like SPF, DKIM, and DMARC are not properly published.
There is a different console for different things; I just want one consolidated console.
A lot of emails were missed despite being known samples.
Mimecast Email Security is somewhat expensive compared to the competition in the Indian market.
We discussed the phishing aspect, the DNS system, and the key rotation.
We've likely saved 30% of costs.
Money-wise, it is a part of the Office 365 suite, making it slightly more expensive compared to Trend Micro.
Microsoft is quite affordable with a lot of features available for any size organization.
The pricing is higher for Mimecast, particularly for the Indian market, where it is considered expensive.
Regarding the price, I think that in terms of similar products, it is pretty much in the same line, so I think it's reasonable.
It ranks the threats and allows us to prioritize those hitting us the hardest, such as email threats.
It provides end-to-end visibility on email threats such as phishing, extending beyond Exchange Online Protection.
The value of the DLP feature is significant to us because we have internal data, sometimes sensitive, and the users may not always be aware of security and privacy, which might lead them to send out information mistakenly to external parties.
A distinct advantage of Mimecast is its ability to block phishing and impostor attacks, which are significant threats currently.
One of the most useful features is the threat remediation module, which can be used to remove malicious emails that may have been delivered or manually remove them.
Mimecast Email Security includes the best gateway solution across all Cisco, Trend Micro, and other solutions.
| Product | Market Share (%) |
|---|---|
| Microsoft Defender for Office 365 | 21.4% |
| Mimecast Advanced Email Security | 16.5% |
| Other | 62.1% |

| Company Size | Count |
|---|---|
| Small Business | 23 |
| Midsize Enterprise | 10 |
| Large Enterprise | 31 |
| Company Size | Count |
|---|---|
| Small Business | 19 |
| Midsize Enterprise | 11 |
| Large Enterprise | 13 |
Microsoft Defender for Office 365 is a comprehensive security solution designed to protect organizations against advanced threats in their email, collaboration, and productivity environments. It combines the power of Microsoft's threat intelligence, machine learning, and behavioral analytics to provide real-time protection against phishing, malware, ransomware, and other malicious attacks.
With Microsoft Defender for Office 365, organizations can safeguard their email communication by detecting and blocking malicious links, attachments, and unsafe email content. It employs advanced anti-phishing capabilities to identify and prevent sophisticated phishing attacks that attempt to steal sensitive information or compromise user credentials.
This solution also offers robust protection against malware and ransomware. It leverages machine learning algorithms to analyze email attachments and URLs in real-time, identifying and blocking malicious content before it reaches users' inboxes. Additionally, it provides advanced threat-hunting capabilities, allowing security teams to proactively investigate and respond to potential threats.
Microsoft Defender for Office 365 goes beyond email protection and extends its security features to other collaboration tools like SharePoint, OneDrive, and Teams. It scans files and documents stored in these platforms, ensuring that they are free from malware and other malicious content. It also provides visibility into user activities, helping organizations detect and mitigate insider threats.
Furthermore, this solution offers rich reporting and analytics capabilities, providing organizations with insights into their security posture and threat landscape. It enables security administrators to monitor and manage security incidents, track trends, and take proactive measures to enhance their overall security posture.
Mimecast Advanced Email Security offers advanced features like sandboxing, email archiving, and phishing protection. It's known for integration with Microsoft 365 and user-friendly admin management, making it a robust choice for secure communications.
Focused on safeguarding emails, Mimecast Advanced Email Security integrates seamlessly with Microsoft 365, providing features such as sandboxing, spam filtering, and email archiving. It delivers comprehensive protection against phishing, identity threats, and impersonation attempts. Administrators benefit from the ability to monitor external communications and customize configurations, enhancing email security. Users appreciate the intuitive admin console and responsive support team. Although it faces challenges in threat detection rates and administration complexity, its capabilities in email monitoring, spam filtering, and URL inspection remain valued by enterprises seeking reliable email security that supports compliance needs.
What key features should users explore?Mimecast Advanced Email Security is implemented across industries to protect against email threats like phishing, spam, and malicious attachments. It serves as both a gateway and an archiving tool, supporting compliance in healthcare and finance by offering features like URL protection and data loss prevention. Enterprises leverage its capabilities to secure inbound and outbound communications effectively.
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