

Find out in this report how the two Email Security solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.
There is definitely a return on investment when using Mimecast, as it blocks phishing emails, reducing the risk of significant financial losses.
The ROI which companies see should be able to justify buying Mimecast Advanced Email Security.
Importantly, we didn’t need to hire any additional staff; we were able to absorb this responsibility using our existing team.
I estimate that we have improved our efficiency, especially for phishing campaigns where we can handle multiple similar emails together, which has reduced repetitive analyst work and improved our response time.
Support personnel are hesitant to engage in remote sessions, preferring to share documentation via email.
The customer support for Mimecast Advanced Email Security is excellent.
We instantly get customer support from Mimecast Advanced Email Security whenever there is a requirement.
We were able to get in touch with the person who constructed the LLM and its agentic aspects relatively quickly to address our questions.
I would rate customer support ten out of ten.
It handles email flow very smoothly, and we never face any issues with email delivery as our organization grows or email volume increases.
If Mimecast Email Security introduces API solutions, it will dominate the market.
While our user base remains around 2,200, I believe it can adapt to much larger requirements as needed, based on discussions with others managing larger organizations.
Despite nearly doubling the number of mailboxes and adding significantly more detection rules, the service remains just as fast as it was when we first implemented it.
Its scalability is also good, as it can scale with the number of protected mailboxes or users, or as email volume grows, supporting enterprise development across Microsoft 365 or Google Workspace.
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.
When it comes to stability and reliability, we have not faced any notable issues with Mimecast Advanced Email Security for our customers.
The issues we did have were causing quite a lot of problems.
Sublime Security acted quickly; once Microsoft alerted Outlook about the incoming email, Sublime Security managed to pull it from the stream before it had a chance to appear in the user's inbox.
When you buy an XDR provider, they give you a complete holistic story around it, showing what has happened, which email somebody has clicked on, whether there have been any changes, and whether there is any network activity.
Instead of reactive measures, it could proactively identify spam domains and prevent them from derailing mail flow.
A lot of emails were missed despite being known samples.
While they do provide API-level access and web hooks, I believe more out-of-the-box integrations with SOAR platforms and SIEM tools would enhance Sublime's value.
One breach could potentially put a small company out of business, so having a tool such as this might save them from that fate.
Sublime Security could be improved by enabling more integration, better customization of alerts, and more detailed reporting.
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.
Overall, my experience with pricing, setup costs, and licensing was smooth.
It's competitive with its peers, especially for the number of mailboxes we have.
There was a signature phishing scam on the internet, but Mimecast Advanced Email Security caught it before it came to fruition and instantly blocked that signature-based phishing scam.
It easily generates reports about the kinds of emails coming in weekly and classifies them into various categories, making it very helpful to analyze and ensure our email gateway remains safe and secure by updating all security patches.
A distinct advantage of Mimecast is its ability to block phishing and impostor attacks, which are significant threats currently.
This level of detail is essential for analysts and anyone conducting evaluations, as it helps them understand the specific circumstances of their environment.
It adds a smarter layer that catches anything missed by Microsoft 365 or Google Workspace protection.
The best features of Sublime Security are advanced phishing and BEC detection, campaign grouping, threat hunting, and automated remediation.
| Product | Mindshare (%) |
|---|---|
| Mimecast Advanced Email Security | 3.8% |
| Sublime Security | 1.2% |
| Other | 95.0% |

| Company Size | Count |
|---|---|
| Small Business | 19 |
| Midsize Enterprise | 13 |
| Large Enterprise | 21 |
| Company Size | Count |
|---|---|
| Small Business | 8 |
| Midsize Enterprise | 5 |
| Large Enterprise | 10 |
Mimecast Email Security protects organizations against phishing, malware, business email compromise, and impersonation attacks, with detection built on 20 years of experience and over 1.3 billion emails inspected daily. It's available as a secure email gateway (MX-based) for full control over complex, multi-region environments, or via API integration with Microsoft 365, which deploys in hours with no MX changes. Administrators get a single console for policy management, monitoring external communications, and customizing configurations, and can pair it with Mimecast Cloud Archive for long-term email retention and compliance.
What key features should users explore?
What benefits can impact ROI?
Industries and use cases
Mimecast Email Security is used across industries, including healthcare and finance, to secure inbound and outbound communications and support compliance requirements. Enterprises use it as a gateway, an API-based layer on top of Microsoft 365, or both, depending on how much control versus deployment speed they need.
Sublime Security provides innovative email security solutions focusing on advanced threat detection and customization, designed to tackle complex security challenges in enterprise environments.
True to its name, Sublime Security delivers a robust platform for email security that empowers professionals with precision tools for threat hunting and detection. It stands out for its focus on customization, allowing users to tailor security protocols to specific threats, enhancing detection accuracy. The platform supports detailed analysis, enabling IT teams to dissect threats and respond swiftly. Despite its strengths, improvement areas include easing integration processes and expanding user documentation.
What features define Sublime Security?
What benefits or returns on investment should users consider?
Within the financial sector, Sublime Security is implemented to protect sensitive client data from phishing and malware attacks. In healthcare, it offers customized solutions for securing patient information against unauthorized access. The adaptability of its detection algorithms makes it valuable in diverse industry applications.
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