Technical Review by
Craig MacAlpine
IRONSCALES adds post-delivery protection on top of your existing gateway using AI and crowdsourced intelligence to catch phishing, BEC, and impersonation attacks native filters miss with deployment in under an hour.
Material Security combines phishing protection, data security, and identity controls for cloud-first teams with inbox-level MFA locking down sensitive data even after account compromise via 30-minute API deployment.
Abnormal AI baselines normal communication patterns to deliver behavioral AI detection with very few false positives alongside automated triage and remediation freeing up SOC analyst time significantly.
Email remains the primary attack vector, and native platform protections consistently miss threats that targeted phishing tools catch. Your email gateway filters commodity spam, but it struggles with credential harvesting, CEO fraud, and supply chain impersonation that don’t trip signature-based rules.
Choosing between platforms is straightforward enough. Choosing the right architecture is where it gets complicated. Some teams need supplemental post-delivery protection layered on top of Microsoft Defender or Gmail’s native filters. Others operate in hybrid or on-premises environments where gateways matter more. And some prioritize coaching end users to make better decisions rather than just blocking messages.
We evaluated 10 phishing protection solutions across cloud, on-premises, and hybrid deployments. We evaluated each for detection accuracy, false positive rates, deployment friction, user experience, and integration depth with existing email systems. We reviewed customer feedback and vendor claims against real-world operational experience to separate marketing from measurable impact.
This guide gives you the framework to match the right phishing protection to your email architecture, team size, and risk tolerance.
We evaluated these solutions on detection accuracy, deployment friction, and operational overhead. Each balances different security and usability priorities.
IRONSCALES is a cloud-native email security platform for organizations on Microsoft 365 or Google Workspace. It adds post-delivery protection on top of your existing gateway, using AI and crowdsourced intelligence to catch phishing, BEC, and impersonation attacks native filters miss.
We found the standout here is Themis, the platform’s AI engine. It auto-classifies suspicious emails and improves as you tune it. Deployment requires no MX record changes, and setup takes under an hour.
The one-click Outlook reporting button lets end users flag suspicious messages directly. That feeds into Themis, so your whole organization contributes to threat intelligence. Built-in phishing simulations and training tie awareness into the workflow without a separate tool.
Customers say the platform consistently catches threats that M365 Defender misses on its own. Support gets high marks, and teams report the portal is intuitive enough that analysts spend less time triaging.
Some users have flagged that the admin interface takes getting used to, with certain settings buried deeper than expected.
We think IRONSCALES hits the mark for mid-market and enterprise teams on M365 that want strong post-delivery phishing protection without a heavy lift. If your security team is small and needs fast time to value, this delivers.
Material Security is an automated detection and response platform for Google Workspace and Microsoft 365. It goes beyond email filtering by combining phishing protection, data security, and identity controls in a single toolkit.
We found the real differentiator is how Material handles post-compromise scenarios. If an account gets hijacked, the platform applies MFA at the inbox level, locking down sensitive messages and password reset links before attackers can use them. Most email security tools skip that layer entirely.
Phishing detection uses AI and a custom rules engine to catch BEC, malware, and impersonation attempts. Admins can pull malicious emails from every mailbox in seconds, even after delivery. Deployment takes around 30 minutes via API with no MX record changes.
Customers say Material treats Google Workspace as a true first-class environment, not an afterthought. Support consistently gets top marks, with teams praising fast response times and a willingness to act on feedback.
Some users have flagged that initial setup can feel overwhelming if your team is less experienced with similar tools. The ticketing dashboard needs work, and a few customers note that new features sometimes ship before the UX is fully refined. Configuration documentation could be clearer in places.
We think Material is a strong pick for teams that want more than phishing filtering. If you need inbox-level data protection and identity controls alongside detection, this covers ground most competitors do not.
Abnormal AI is a cloud-native email security platform that uses behavioral AI to detect phishing, BEC, and supply chain fraud in Microsoft 365 environments. It sits behind your existing gateway via API, analyzing thousands of signals to baseline normal communication patterns and flag anomalies.
We saw the behavioral AI approach pay off in detection accuracy. Instead of relying on static rules, the platform learns what normal looks like for your organization and catches deviations. That means fewer false positives and less time managing email queues. One-click deployment via API keeps rollout simple with no disruption to mail flow.
The platform also automates SOC workflows around email triage. Malicious messages get flagged and removed without analyst intervention. It pulls in signals from identity, calendar, and collaboration tools to build a fuller threat picture.
Customers say the accuracy stands out immediately, with teams reporting a major drop in phishing triage time after switching from legacy gateways like Mimecast and Barracuda. The low false positive rate is a consistent theme, and support gets strong marks across the board.
Some users have flagged that reporting filters do not persist between views, which slows down investigations.
We think Abnormal AI is a top choice if your priority is detection accuracy with minimal operational overhead. If you run M365 and want to replace a noisy legacy gateway, this is worth evaluating.
Egress Defend is a phishing protection platform for Microsoft 365 that uses adaptive behavioral AI to stop threats traditional gateways and native controls miss. It focuses on reducing human risk through real-time coaching, not just blocking emails.
We found the standout feature is the nudge-based warning system. Color-coded banners flag suspicious messages in context, coaching users at the moment they need it. The platform evaluates links, language, sender identity, attachments, and HTML code together. That complete approach helps catch zero-day threats and BEC attempts.
Auto-remediation lets admins remove malicious emails with one click, including similar messages across all mailboxes. Threat collation and abuse mailbox automation cut down on repetitive triage. Risk scoring per user gives your team visibility into who is most vulnerable.
Customer feedback for Egress products highlights strong support and easy initial setup. The Outlook integration works well, though some users note it can add a slight delay to sending and startup. Licensing costs add up at scale, which is a factor for larger rollouts.
Some users have flagged that coaching banners need internal communication before rollout. If your team is not expecting in-context warnings, it can cause confusion. The platform is built for M365, so organizations on other email systems should look elsewhere.
We think Egress Defend is a strong fit if your biggest concern is user-driven risk. If you want to reduce phishing click rates while building security awareness, the real-time coaching approach sets it apart.
Fortra’s Cloud Email Protection uses predictive AI to detect phishing, BEC, and impersonation attacks across Microsoft 365 and Exchange, plus Google Workspace. Formerly known as Agari Phishing Defense, it works as a supplemental layer alongside your existing gateway or standalone.
We found the policy engine is where this platform earns its keep. You can build targeted rules to catch domain spoofing and display name impersonation with specific actions per policy. Active Directory sync flags messages where the display name matches an employee but the source does not match your mail system. Remediation is straightforward, with bulk actions across quarantined messages.
Proactive threat hunting by Fortra’s analyst team adds another layer, backed by their Global Inbox Threat Intel feed. That gives you an extra set of eyes on emerging threats beyond automated detection.
Customers say message analytics are informative without being overwhelming, and the platform catches threats primary gateways miss. The ability to remediate harmful emails directly from user mailboxes is a consistent highlight.
Some users have flagged that the policy exception workflow needs work.
We think Fortra’s Cloud Email Protection is a solid pick if you need flexible deployment across M365, Exchange, and Google Workspace. The policy customization suits teams that want granular control over impersonation detection.
Hornetsecurity Email Threat Protection is a layered email security platform combining AI-driven fraud forensics, malware sandboxing, and secure link rewriting to stop phishing, ransomware, and BEC before they reach users. It is built for M365 environments with centralized administration.
We found the AI-based targeted fraud forensics to be the standout capability. The engine analyzes identity spoofing, malicious intent, falsified facts, and espionage patterns rather than relying on signatures alone. Suspicious attachments run through a built-in sandbox, and the platform decrypts weaponized documents for deep scanning. URL rewriting replaces original links with safe versions in real time.
The dashboard gives clear visibility into mail flows with few false positives in daily operation. Real-time alerts keep your team informed without constant portal monitoring. The platform also includes phishing simulation campaigns for user awareness.
Customers say centralized control saves significant admin time, and the AI analysis is practical for quickly assessing email risk without manually reviewing each message. Initial setup generally goes smoothly, though some teams report it took longer than expected due to groundwork needed in their environment.
Some users have flagged that the Targeted Fraud Forensics module can over-block, with limited flexibility to customize its rules.
We think Hornetsecurity is a good fit if you want layered detection with sandboxing and AI forensics in one package. If your team values centralized M365 administration and quick threat visibility, this delivers.
Microsoft Defender for Office 365 is a cloud-based email security service built into the Microsoft ecosystem. It protects Exchange, SharePoint, OneDrive, and Teams with anti-phishing, malware detection, and automated investigation. For organizations already on M365, it is the lowest-friction starting point.
We found the native integration is the core advantage. Safe Links and Safe Attachments work across Outlook, Teams, and SharePoint without additional deployment. Automated Investigation and Response reduces manual triage by correlating alerts and taking action across affected mailboxes. The platform provides actionable insights rather than generic alerts, helping security teams prioritize faster.
Real-time scanning covers emails, attachments, and collaboration tools in one pass. Reporting includes URL trace and threat intelligence drawn from Microsoft’s broader ecosystem. For teams using Splunk or similar SIEMs, integration is straightforward.
Customers say the micro-level monitoring and organized dashboards make daily incident management efficient. Teams handling security breach response regularly find the segmented views practical for quick resolution.
Some users have flagged that policy configuration is complex, especially for newer administrators.
We think Defender for Office 365 makes sense if your organization is already invested in the Microsoft stack and wants protection without adding a third-party tool.
Mimecast Email Security is a layered phishing defense platform combining AI, sandboxing, and URL protection to stop phishing, ransomware, and BEC. It covers Microsoft 365, Google Workspace and on-premises, plus hybrid environments, making it one of the few options in this space with true deployment flexibility.
We found the Targeted Threat Protection suite is where Mimecast earns its reputation. Impersonation Protection accurately flags BEC and CEO fraud attempts that traditional filters miss. URL rewriting scans links in real time across live and archived emails, catching delayed attacks. Attachment sandboxing and document decryption add depth before anything reaches users.
AI-driven anomaly detection scans headers, domains, and content for behavioral abnormalities and brand spoofing. The broader Mimecast ecosystem also includes archiving, DMARC management and security awareness training, plus email continuity options.
Customers say protection is consistent and low-noise, with strong phishing and impersonation blocking out of the box. Policy customization runs deep, giving teams granular control over how different threat types are handled. Implementation is well-documented with minimal mail flow disruption.
Some users have flagged that the admin interface feels clunky, with settings buried in nested menus that slow troubleshooting.
We think Mimecast is a strong option if you need a full-platform email security solution that works across cloud, hybrid, and on-premises setups. The policy depth suits teams that want fine-grained control.
Proofpoint Enterprise is an email security platform built for large organizations defending against phishing, BEC, malware, and advanced payload-less threats. It supports cloud, on-premises, alongside virtual appliance and hybrid deployments with customizable policies at user, group, or global level.
We found the NexusAI-powered BEC Defense is the standout capability. It catches impostor messages carrying no malware by analyzing sender behavior, language cues, and header anomalies. Multilayered detection stacks signature-based antivirus, IP reputation, machine learning, and dynamic classification to filter spam, phishing, and bulk mail. Color-coded warning tags on suspicious messages help users make better decisions before clicking.
Smart Search lets admins trace any email in seconds, which matters at enterprise scale. The platform extends into DLP, encryption, and targeted threat protection for organizations wanting a unified stack.
Customer feedback from the broader Proofpoint ecosystem highlights strong detection accuracy and behavioral analytics that catch anomalies traditional tools miss. Teams using the DLP modules praise visibility into user behavior, with several noting the intel is valuable for SOC investigations.
Some users have flagged that initial policy setup requires significant tuning, especially for complex rule sets. The multi-module architecture means full value comes from deeper platform adoption, which increases both cost and admin complexity. Integration and usability concerns surface in larger deployments.
We think Proofpoint Enterprise is the right fit if your organization operates at scale with complex infrastructure and compliance requirements. The policy granularity and deployment flexibility are hard to match.
Check Point Harmony Email and Collaboration is a cloud-based platform that protects inboxes and collaboration apps across Microsoft 365 and Google Workspace. Formerly known as Avanan, it extends security beyond email to OneDrive, Google Drive, and Teams from a single API deployment.
We found the cross-platform coverage is the key differentiator. The platform secures email, file sharing, and collaboration tools together rather than treating each as a separate problem. Machine learning analyzes communication patterns to detect impersonation and fraudulent messages, catching phishing and malware, plus suspicious links before they reach inboxes. Deployment takes minutes via API with no MX record changes.
The dashboard is clean and well organized, giving visibility into how files and messages move between users and applications. That flow-level view helps with both threat detection and audit requirements.
Customers say the platform works quietly in the background without adding friction to daily workflows. The M365 and Gmail integration gets consistent praise for being low-maintenance once deployed. Teams working remotely across multiple file-sharing platforms appreciate the unified coverage.
Some users have flagged that filtering runs too strict at times, quarantining legitimate emails that need manual release. Policy customization lacks granularity, especially when setting different rules across user groups. Advanced configuration has a learning curve, and initial optimization takes dedicated time.
We think Check Point Harmony is a strong option if you need protection extending beyond email into collaboration tools. If your organization runs M365 or Google Workspace with heavy file sharing across Teams or Drive, the cross-platform coverage fills a gap most email-only tools leave open.
A cloud-native email security platform that stops phishing attacks before they reach the inbox.
A platform that simulates phishing attacks to train employees to recognize and report them.
Provides advanced threat protection against phishing, malware, and other email attacks.
When evaluating phishing protection solutions, we’ve identified six essential criteria. Here’s the checklist of questions you should be asking:
Prioritize based on your architecture. M365-only shops should weight native integration and deployment speed. Organizations with on-premises mail should look for solutions that handle hybrid environments without friction. Teams focused on user training might prioritize coaching and reporting over pure blocking capability. Security teams with small analyst headcount should weight automation and remediation speed heavily.
Expert Insights is an independent editorial team that researches, tests, and reviews cybersecurity and IT solutions. No vendor can pay to influence our review of their products. Our Editor’s Scores are based solely on product quality. Before testing, we map the full vendor market for each category, identifying all active vendors from market leaders to emerging challengers.
We evaluated 10 phishing protection platforms across cloud, hybrid, and on premises email environments. We evaluated deployment workflows, integration depth with M365 and Google Workspace, policy configuration capabilities, detection accuracy across phishing types, false positive rates, admin experience, and incident response workflows. Each platform was deployed in representative customer environments when possible to assess real-world performance.
Beyond hands-on evaluation, we conducted in-depth market research across the email security market and reviewed customer feedback and interviews to validate vendor claims against operational reality. We spoke with product teams to understand architecture decisions, roadmap priorities, and known limitations. Our editorial and commercial teams operate independently. No vendor can pay to influence our review of their products.
This guide is updated quarterly. For full details on our evaluation process, visit our How We Test & Review Products.
Email phishing protection isn’t one-size-fits-all. Your choice depends on your email platform, how integrated your security team is with user training, and how much policy customization you’re willing to manage.
If you run Microsoft 365 and want fast post-delivery protection without MX changes, IRONSCALES delivers strong AI detection with integrated user reporting. Setup happens in under an hour.
If your security team is drowning in alert fatigue from false positives, Abnormal AI uses behavioral analysis to cut noise dramatically. Teams switching from legacy gateways report immediate relief. Larger teams should verify RBAC capabilities match your permission model.
If you operate in mixed environments with cloud, hybrid, and on-premises email, Mimecast remains the most flexible choice. The admin interface feels dated.
If user behavior is your biggest vulnerability, Egress Defend uses in-context coaching banners to reduce clicks on phishing messages. The behavioral approach complements traditional detection without just adding another blocking tool.
If you need inbox-level data protection beyond phishing, Material Security applies MFA at the inbox level to lock down sensitive data even after account compromise.
For most M365-only shops, start with Microsoft Defender for Office 365 to establish a baseline.
Review the individual evaluations above to understand deployment specifics, pricing, and the trade-offs that matter for your email architecture and team size.
Phishing is a type of cybercrime based on fraud. In a phishing attack, a cybercriminal contacts their target—usually via email—and tries to manipulate them into doing something that will put their data at risk. A user may be encouraged to share their credentials and financial information, or installing malware that will enable the attacker to access their machine.
Traditionally, phishing attacks were used to target hundreds or even thousands of people at once. Today, these attacks are becoming increasingly targeted; instead of sending a generic email to lots of users, the attacker will research their target before messaging them, then pretend to be someone the target knows in order to gain their trust. Because of this, the attacks are much more convincing and difficult to spot – the target is more likely to share sensitive information. These targeted phishing attacks are known as “spear phishing”.
Aside from traditional phishing and targeted spear phishing attacks, there are a few more types of phishing attack that you should make your users aware of:
These solutions have a series of capabilities and features to identify malicious websites and compromised credentials, this reduces zero day phishing attacks. By identifying compromised login credentials that have been stolen in credential theft attacks, organizations can ensure that security measures are sufficient by changing passwords. By flagging malicious urls, users can ensure that they do not submit their details to fraudulent websites.
Good phishing prevention solutions should contain the following key features:
Email scanning – of incoming emails as well as outgoing emails to identify any sensitive details being shared, or any requests to do so. Suspicious messages should be either blocked or flagged to make users aware of the risks.
Report Phishing Button – this allows users to flag emails that may have been delivered, but show suspicious signs. Some services also offer a service to block phishing sites, further strengthening the attempts to mitigate phishing attacks.
Database access – some phishing attempts will be sent to a large number of inboxes. If a solution has access to a database of identified risks it can be easier to identify commonly used phishing templates. With the advent of artificial intelligence, many phishing communications are becoming more specific. Ensuring that your data is shared with the database can help to protect other users too.
Brand protection – some solutions will scan databases to identify if your brand is being used to trick users. While this is most common for large, trusted organizations, as attacks become more specific, smaller organizations could be targeted too.
According to the FBI’s Internet Crime Complaint Center (IC3), phishing is the most prevalent threat type in the US. Unfortunately, phishing attacks are not only prevalent but also highly successful; recent research from Verizon found that 82% of data breaches last year involved a human element, such as phishing or the use of stolen credentials. A further report from IBM discovered that one fifth of companies that suffer a malicious data breach are compromised due to lost or stolen credentials, while 17% are compromised via a direct phishing attack.
Traditionally, email protection came in the form of a secure email gateway (SEG). SEGs create a defensive perimeter around your organization’s email client, preventing the delivery of threats such as spam, graymail, and mail sent from senders on a deny list. However, they aren’t very effective at blocking highly specific and targeted phishing attacks.
Integrated Cloud Email Security (ICES) solutions sit within the user’s inbox, scanning all inbound and outbound (and sometimes also internal) messages for anomalous or malicious activity. ICES solutions use machine learning to detect threats; this enables them to pick up on indicators of compromise that are likely to go unnoticed by a SEG, such as unusual communication patterns, typos and grammatical errors, and unusual attachment types. When an ICES tool does find an indicator of malicious activity, it either deletes the email from the user’s inbox, quarantines it, or delivers the email but inserts a warning banner at the top to alert the user to its potential malice.
Some ICES providers (including many on this list) also offer a plug-in as part of a phishing simulation program that enables users to report phishing threats from directly within their inbox.
Many organizations choose to implement a SEG alongside an integrated cloud email security solution to ensure maximum protection against multiple types of email threat. The SEG acts like the wall around your castle, deflecting known threats; the cloud email security solution acts like the guards patrolling your castle grounds, looking for anything out of the ordinary.
Security Awareness Training (SAT) is a human-centric form of phishing prevention. Usually, an SAT course is made up of two parts: content-based learning, and phishing simulations.
Phishing simulations are fake phishing emails that test a user’s ability to identify and report phishing threats. The strongest phishing simulators include a “report phishing” button that plugs into each user’s inbox, enabling them to report simulations (and, in some cases, real phishing threats) directly to their IT team as they come across them.
If a user fails a phishing simulation, they’re informed of where they went wrong, and IT and security teams can assign them more training as required.
Implementing a robust email security solution that combines ML-driven threat detection with phishing simulations is one of the best forms of defense against sophisticated spear phishing attacks. However, there is no single silver bullet solution to phishing. To ensure your best chances of staying secure, we recommend that you take a multi-layered approach to defense by implementing the further following tools.
Using a variety of tools in a complementary approach will result in a well-rounded, comprehensive cybersecurity infrastructure, which will also help protect you from other web, identity, and endpoint threats.
Security Awareness Training (SAT)
Security awareness training solutions train users on how to identify and correctly respond to a range of cyberthreats, including phishing attacks. Most SAT solutions combine a mixture of content-based, bite-sized training modules to teach users what different types of attack may look like, with phishing simulations that enable security teams to test how users are likely to respond to a real-life phishing attack. If a user clicks on a link in a phishing simulation, admins are notified and can assign that user further training. SAT is a great way of training users to be more vigilant in their work and personal lives, whilst instilling a culture of security within the organization.
Many organizations make the mistake of assigning security awareness training annually. While this might be enough to tick off a compliance checklist, it’s unlikely to actually improve your security. For best results, we recommend delivering regular, bite-sized training.
Multi-Factor Authentication (MFA)
Multi-factor authentication requires users to verify their identities in two or more ways before being granted access to an account, application, or system. By implementing MFA, you can stop an attacker from accessing a user’s account, even if they’ve managed to get their hands on that user’s password via a phishing attack.
Different MFA solutions support different methods of authentication—some of which are less “phishable” than others. The strongest methods of authentication to prevent phishing attacks are biometric authentication (such as fingerprint scanners, facial recognition, and behavior recognition) and hardware authentication (using smart cards or USB sticks).
Endpoint Security/Antivirus
Some phishing attacks are used as a means of infecting an organization with malware, such as ransomware or an infostealer. The attacker simply sends the malware as an attachment and tries to manipulate their victim into downloading it. Implementing strong endpoint security or antivirus software can help mitigate the impact of a successful phishing attack by preventing the spread of malware across your organization, even if a user clicks on a malicious attachment.
Web Security
Phishing attacks are usually delivered via email, but there are millions of phishing webpages online that trick users into thinking that they’re entering their credentials or payment information into a legitimate website, when really the information they enter is being harvested by a cybercriminal.
A strong web security solution can help prevent your users from entering their details into phishing pages. There are several tools that can be used to achieve this.
Strong Password Practices
Enforcing strong password practices won’t necessarily prevent phishing attacks, because phishing involves the threat actor stealing a password directly from your users, rather than cracking it using brute force. However, it can help minimize the damage that an attacker is able to do if they do gain access to a user’s account.
We recommend that you ensure that passwords are regularly updated across your organization, either through the use of password policy enforcement software or a business password manager. This means that, even if a password is compromised, the attacker will only be able to use it for a limited amount of time.
Caitlin Harris is the Deputy Head of Content at Expert Insights. As an experienced content writer and editor, Caitlin helps cybersecurity leaders to cut through the noise in the cybersecurity space with expert analysis and insightful recommendations.
Prior to Expert Insights, Caitlin worked at QA Ltd, where she produced award-winning technical training materials, and she has also produced journalistic content over the course of her career.
Caitlin has 8 years of experience in the cybersecurity and technology space, helping technical teams, CISOs, and security professionals find clarity on complex, mission critical topics like security awareness training, backup and recovery, and endpoint protection.
Caitlin also hosts the Expert Insights Podcast and co-writes the weekly newsletter, Decrypted.
Craig MacAlpine is CEO and Founder of Expert Insights. Before founding Expert Insights in August 2018, Craig spent 10 years as CEO of EPA Cloud, an email security provider that rebranded as VIPRE Email Security following its acquisition by Ziff Davies, formerly J2Global (NASQAQ: ZD) in 2013.
Craig is a passionate security innovator with over 20 years of experience helping organizations to stay secure with cutting-edge information security and cybersecurity solutions.
Using his extensive experience in the email security industry, he founded Expert Insights with the singular goal of helping IT professionals and CISOs to cut through the noise and find the right cybersecurity solutions they need to protect their organizations.