Top 5 Mimecast Competitors & Alternatives

Mimecast is a well-known name in the email security field, offering enhanced protection for Microsoft 365 and Google Workspace. But, as more modern competitors have joined the field, customers may be considering whether it’s still the best option. Below, we compare Mimecast to other top alternatives in the email security field to see how they stack up.

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Key Takeaways

  • Email security solutions are an essential part of every enterprise’s security posture.
  • Mimecast is a legacy name in the email security field that offers broad protection.
  • The best tools extend beyond basic functions and expand to cover advanced threat detection and mitigation.
  • Competitors like Check Point include security strategies that help prevent threats from occurring, rather than just responding to them.
  • Check Point, Proofpoint, Barracuda, Cisco, and Sophos are all strong alternatives to Mimecast.

Evaluating Mimecast Advanced Email Security

Mimecast is a well-known cybersecurity provider that offers services across data compliance, security awareness training, insider risk management, and email & collaboration threat protection. Its email security services are the most extensive of its offerings, spanning phishing, email compromise, ransomware protection, and zero-day attacks.

Mimecast was an early adopter of AI-powered security solutions, implementing machine learning to better detect and flag suspicious behavior and email patterns. Able to identify complex sender patterns and block potentially malicious threats, Mimecast helps admins stay on top of emerging threats before they cause damage. By incorporating additional security tools, it also allows teams to create automated security workflows and incident responses.

That said, many of its capabilities rely on admins layering multiple modules together. Although it does now offer API-based integration, teams will have to use several plans and combine different security modules to cover the full spectrum of threats that their business anticipates. 

Overall, Mimecast is a powerful tool that’s a great option for enterprises looking for a hands-on security tool. If admins have the time and technical expertise to implement Mimecast properly, it can detect and respond to the majority of the leading cybersecurity threats. As a bonus, its emphasis on employee training also goes a long way to reducing human errors that can lead to email account takeovers and data breaches.

Pros And Cons

Pros of Mimecast Email Security

  • Offers a user-friendly experience, making it easy to use even for those who aren’t familiar with Mimecast’s documentation.
  • Provides a strong range of security features, including protection against common threats like phishing.
  • Has implemented AI-first security into the platform, helping to improve behavioral monitoring, anomaly detection, and advanced threat blocking.
  • Mimecast helps businesses to achieve a good level of visibility over their email domain.

Cons of Mimecast Email Security

  • The more complex features, which help to block advanced threats, are difficult to configure and can add admin overhead.
  • Mimecast’s centralized admin portal is difficult to navigate, requiring extensive time to set up and maintain properly.
  • Mimecast’s threat detection is reported as overly sensitive, blocking legitimate emails and requiring admin intervention.
  • High false positive rates can diminish the efficacy of active Mimecast email security tools, frustrating customers.

Top Mimecast Competitors and Alternatives

Although Mimecast is a recognizable name in email security, several other options offer a similar or more extensive range of security protections while overcoming some of its limitations. For businesses that want reduced operational complexity or broader collaboration coverage, for example, the following alternatives may be a better choice.

Here are the top five Mimecast competitors and alternatives.

#1. Check Point Workspace Security Email & Collaboration Suite Security

Check Point Workspace Security Email & Collaboration is a comprehensive, prevention-oriented email security platform that stops threats before they ever reach your employees. Workspace Security delivers enterprise-grade protection across email and all modern collaboration platforms, like Google Workspace, Slack, Teams, and SharePoint.

Workspace Security is a market leader in email protection, defending against everything from phishing, business email compromise (BEC), and malware to account takeover attacks and complex forms of ransomware. Check Point ThreatCloud AI powers Workspace Security, providing an intelligence database fed from over 150,000 connected networks to detect and neutralize novel threats. By working in real-time, Workspace Security prevents zero-day threats and stops even the most sophisticated impersonation attempts in their tracks.

Workspace Security extends its protection beyond simple detection with inline, pre-delivery blocking systems. It covers the entire email and collaboration lifecycle, enforcing outbound data loss protection policies and sandboxing compromised accounts to stop data leakage. With its integrated security and awareness training, it even helps improve employee cybersecurity knowledge from the inside out, contributing to a robust, modern defense environment.

  • Built-in compliance support with major regulatory frameworks to help businesses meet governance requirements without manual effort.
  • Native integration with existing security ecosystems, including M365 environments and third-party tools, to give teams full flexibility over their perimeter.
  • Unified investigation and response workflows to give security teams 360-degree visibility into sender behavior, incoming and outgoing traffic, and alerts.

#2. Proofpoint Email Protection

Proofpoint Email Protection focuses heavily on socially engineered attacks. It’s effective at stopping phishing attempts and preventing them from reaching end users, and with AI technology, it can also detect compromised accounts based on anomalous user behavior. 

Large enterprises rely on Proofpoint for its retrospective threat detection and mapping. When aiming to improve existing security awareness and threat detection, post-delivery analysis maps out new attack strategies and vectors. By extending to user risk analysis, it can also flag accounts that are more likely to be targeted in an organization.

  • Strong account compromise and detection behavior for risk analysis and flagging.
  • Relies heavily on post-threat response, rather than preemptive protection.
  • Uses a wide threat network to pull upon new intelligence and potential attack vector signals. 

#3. Barracuda Email Protection

Barracuda Email Protection aims to be a pared-down, simple-to-use security system for enterprises. With flexible deployment options and baseline coverage for spam, malware, and some forms of advanced threat protection, it offers cybersecurity support through a simple interface.

Barracuda aims to help organizations that are just getting started with cybersecurity. It offers fast deployment via API integrations, potentially without needing MX-record changes. Customers report that its easy-to-use interface and simple overviews make management relatively easy. Admins can monitor and respond to threats from one window, sandboxing compromised accounts after detecting an active event.

While fast to get started with and rapid to scale, Barracuda does offer a more limited selection of tools compared to other competitors on this list.

  • Aims to impose limits on threats through automated response pathways.
  • Helps mitigate human mistakes with training systems and through revoking privileges from accounts that engage with dangerous content.
  • Doesn’t offer the same depth or complexity when it comes to advanced threats or new attack vectors.

#4. Cisco Secure Email Threat Defense

Cisco Secure Email Threat Defense is a part of the wider Cisco cybersecurity product package. Especially for companies that already work within the Cisco ecosystem, adding email support will provide URL filtering, spam prevention, malware detection, and AI-driven threat detection. However, as pricing is on a per-user basis, costs can quickly scale for larger organizations.

A benefit of Cisco is that it offers extensive reporting, allowing admins to see how threats like BECs or phishing events change over time. This comes in handy when implementing new security controls, as admins can track how effective their measures were across a long-term graph view. 

  • Strong threat intelligence as part of the wider Cisco ecosystem.
  • Directly integrates with other security tools that already connect to the Cisco ecosystem, helping to cover its technical gaps with third-party tools.
  • Can be challenging to set up due to its fragmented deployment across different email-related security products. 

#5. Sophos Email

Finally, Sophos Email is another legacy competitor of Mimecast, having developed its security controls over decades in the industry. As an MDR-optimized email security solution, it combines a range of security tools to monitor and detect evolving threats with expert human analysis.

The integration of Sophos Email and the Sophos MDR service gives extensive visibility over a company’s environment but does mean businesses will have to commit to the Sophos ecosystem to get the most from this tool. Its security defenses aim to be an all-in-one email protection, including typical attacks like phishing prevention, email filtering, and account takeovers.

  • Unified management system for companies that want to enter into the wider Sophos ecosystem. 
  • Cloud-based deployment makes it easy to get started with Sophos Email.
  • Customers report email classification issues, leading to many false positive alerts that can cause admin fatigue.

Maximize Your Security with Check Point

As a central business tool into which other systems connect, email has been (and will likely continue to be) a valuable site to attack for malicious actors. Protecting a company’s email and collaboration environments is no small task, as solutions need to cover potentially thousands of incoming and outgoing messages every single day. While legacy solutions like Mimecast were once the best option, several other attractive alternatives are now available to customers.

Check Point Workspace Security Email & Collaboration, named a Leader in the 2025 Gartner Magic Quadrant for Email Security, encompasses the same centralized, AI-driven solution as Mimecast but couples it with preventative strategies to keep your business safe. Instead of just responding to emerging threats, Workspace Security uses insight from ThreatCloud AI to identify advanced threats in SharePoint, Slack, Teams, email, and other collaboration channels and mitigate them before they impact users.

With automated response and an all-in-one security platform, Workspace Security reduces the need for several different security licenses, allowing businesses to get world-class protection without the architectural overhead. By combining pre-delivery threat prevention, real-time link and attachment inspection, and built-in incident response, Workspace Security gives your business complete coverage.

Request a demo to secure your company’s email and collaboration platforms today.

Mimecast is still one of the leading solutions in the email security space. However, it lacks some of the threat detection, response, and mitigation strategies that other tools provide.
Other competitors in the email security space focus on pre-delivery prevention, rather than mainly focusing on post-attack response. For highly regulated industries, prevention is a much more effective and necessary approach.
While email spam filtering is a part of what an email security solution covers, they go far beyond this simple solution. Email security platforms cover everything from blocking malware to detecting anomalous user behavior and freezing potentially compromised accounts before they can exfiltrate data.
Artificial intelligence allows email security platforms to detect new threat signatures in real time. This is especially important in zero-day threat detection and mitigation, as well as in account takeover scenarios.
Check Point could be considered the leading Mimecast alternative, as it offers the most comprehensive level of support, the widest array of security tools, and both pre-attack mitigations and post-attack diagnostics.

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