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The Forrester Wave™: Enterprise Email Security, Q2 2023
The Forrester Wave™: Enterprise Email Security, Q2 2023


Wave Report
The Forrester Wave™: Enterprise Email Security, Q2 2023
June 11, 2023
The 15 Providers That Matter Most And How They Stack Up
June 11, 2023
JBJess Burn
with Joseph Blankenship, Angela Lozada, Michael Belden


Summary
In our 26-criterion evaluation of enterprise email security providers, we
identified the most significant ones and researched, analyzed, and scored them.
This report shows how each provider measures up and helps security and risk
professionals select the right one for their needs.


TOPICS

We’re Entering The Golden Age Of Email Security



Evaluation Summary




Vendor Profiles








Evaluation Overview





Supplemental Material











We’re Entering The Golden Age Of Email Security
A golden age is a time of great achievement in a society or industry — a time of
innovation and the furthering of new ideas via new mediums or technological
advancements. Email security is now entering a golden age after stagnating for
the better part of a decade. Mass customer migration to cloud email, rapid
adoption of machine learning, and the widespread use of APIs to connect systems
and share data have brought forth improved offerings and capabilities and
innovative roadmaps from legacy providers and newer players. As a result,
customers have more choice than ever when it comes to protecting how employees,
customers, and partners communicate and collaborate. Often, those customers are
choosing more than one email security partner in a layered or multilayer
approach to protection. In fact, of the 37 customer references interviewed for
this research, only two were working with a single enterprise email security
vendor. This approach, as confirmed by customer references, provides greater
efficacy — and peace of mind — as attackers continue their own innovations to
compromise users and gain access to the data and dollars needed to fuel their
malicious enterprises.
As a result of these trends, enterprise email security customers should look for
providers that:
   
 * Offer flexibility in deployments and integrations. The majority of customer
   references employing two or more email security vendors report mixing
   capabilities from each vendor based on strengths or ease of integration with
   other tools or systems. For example, a customer might leverage the advanced
   phishing and business email compromise (BEC) detection machine learning
   models of one vendor and the data loss prevent (DLP) and encryption
   capabilities of another. Others noted a preference to feed the telemetry from
   one or more email security solutions into security analytics tools to
   initiate investigation and response actions. And still others prefer to hang
   onto their gateway deployments for spam and graymail filtering, adding a
   cloud-native API-enabled email security (CAPES) deployment to “catch what
   makes it through.” The email security vendors you work with should
   demonstrate an ability to connect and share data with each other and with key
   tools in your security tech stack.
 * Make it easy for security teams to respond. The speed and ease with which a
   security analyst can investigate and respond to an alert or incident is
   highly dependent on the speed and ease with which the analyst can: 1) be
   trained on the solution and 2) complete tasks. Legacy enterprise email
   security players and larger platform players offering email security alike
   have developed or acquired capabilities over time, leading to differences in
   access, user interface, and levels of context between often loosely linked
   offerings. Customer references noted that many solutions still require users
   to jump to different consoles to perform tasks, slowing down investigation
   and remediation activities. Many vendors, however, recognize the importance
   of analyst experience (AX) and are making strides to deliver more seamless
   workflows. Ask current or prospective vendors about their plans and timelines
   to improve AX in their own products and with their major technology partners.
 * Look beyond email to deliver holistic human protection. The email inbox is
   often, and justifiably, seen as the critical battle line that must be held.
   As a result, vendors are investing in detection capabilities for
   sophisticated social engineering, cleverly embedded malware, and highly
   realistic landing pages for attacker campaigns. These capabilities are all
   necessary, but there are other fronts. The use of messaging, collaboration,
   file sharing, and enterprise software-as-a-service (SaaS) applications across
   multiple devices all contribute to employee productivity and employee
   experience. Protections developed for the email inbox must extend to these
   environments, yet few vendors in this evaluation currently offer this
   support, though many plan to add capabilities in the next 24 months.
   Additionally, awareness and training efforts must move beyond standard
   phishing testing and compliance checkbox courses to adaptive human
   protection, like real-time “nudges” to encourage vigilance and secure
   handling of sensitive information. Look at vendors delivering or prioritizing
   a more comprehensive approach to protecting all the ways in which people
   work.

Evaluation Summary
The Forrester Wave™ evaluation highlights Leaders, Strong Performers,
Contenders, and Challengers. It’s an assessment of the top vendors in the
market; it doesn’t represent the entire vendor landscape. You’ll find more
information about this market in our report on The Enterprise Email Security
Landscape, Q1 2023.
We intend this evaluation to be a starting point only and encourage clients to
view product evaluations and adapt criteria weightings using the Excel-based
vendor comparison tool (see Figures 1 and 2). Click the link at the beginning of
this report on Forrester.com to download the tool.
Figure 1
Forrester Wave™: Enterprise Email Security, Q2 2023
Figure 2
Forrester Wave™: Enterprise Email Security Scorecard, Q2 2023
Vendor Profiles
Our analysis uncovered the following strengths and weaknesses of individual
vendors.
Leaders
   
 * Proofpoint makes good on its mission to protect people and defend data.
   Enterprise email security stalwart Proofpoint, after going private, made
   moves over the past 18 months to ensure its platform remained relevant with
   customers’ changing email infrastructure as they migrated to cloud email
   infrastructure environments. It released its CAPES deployment option in 2022,
   which includes key features like its Very Attacked Person threat reporting
   and browser isolation, as well as BEC detection and automated remediation
   capabilities. It also acquired identity threat detection and response vendor
   Illusive, adding additional protection against ransomware by discovering and
   remediating identity and privileged identity risks. Proofpoint’s roadmap
   focuses on the threats posed to organizations by their suppliers with
   preemptive protection against compromised suppliers and BEC attempts via
   supplier impersonation or account takeover.
   
   Proofpoint offers expansive inbound and outbound email protection, including
   DLP and encryption. Reference customers highlighted its threat feeds and its
   hosted email fraud protection services to monitor incoming and outgoing email
   for legitimacy. Proofpoint provides out-of-the-box integrations with major
   identity, detection and response, and security analytics solutions, including
   Microsoft Defender. It also offers a strong security awareness and training
   platform. One roadmapped area for improvement evident in the vendor’s product
   demonstration (and noted by reference customers) is the need for Proofpoint
   to better integrate with itself for a more seamless user reporting and
   investigation experience. Security and risk pros looking for a fully loaded,
   infrastructure-and-platform-agnostic email security solution now committed to
   evolving with its customers should consider Proofpoint.
 * Cloudflare makes a strong entry into email security with its Area 1
   acquisition. Cloudflare’s acquisition of Area 1 Security in 2022 brought the
   content delivery network and cloud security provider both in-line and
   API-enabled email security capabilities to thwart multichannel phishing
   attacks. The acquisition furthers Cloudflare’s vision of applying Zero Trust
   principles across all internal and external network, web, and email traffic.
   Cloudflare holds innovation weeks several times a year to improve
   capabilities, forge new partnerships, and strengthen platform integrations.
   Its roadmap includes active simulation (where real attacks against
   organizations are neutralized and turned into an attack simulation), tighter
   integration between its email security and cloud access security broker
   (CASB) offerings, and new capabilities to detect compromised third parties.
   
   Cloudflare uses its preemptive crawling approach to discover phishing
   campaign infrastructure as it’s being built. Its Small Pattern Analytics
   Engine (SPARSE) combines multiple machine learning models, including natural
   language modeling, sentiment and structural analysis, and trust graphs. This
   is combined with content disarm and reconstruction capabilities to protect
   users before, during, and after email delivery. Reference customers note the
   ease and speed of its search capabilities during investigations. Cloudflare’s
   managed email IR and threat hunting service, PhishGuard, includes a unique
   dashboard element for customers that estimates the time and money saved by
   thwarting specific monetary fraud attempts. Though it offers proprietary DLP,
   Cloudflare relies on email infrastructure providers and partnerships for
   encryption. Cloudflare’s Zero Trust approach to email security is a fit for
   organizations that need easily communicated data and insights in addition to
   in-depth content analysis and processing.
 * Microsoft delivers communication protection with streamlined analyst
   experience. Now a security tech powerhouse, Microsoft’s continued investment
   in security is paying off as it protects end users from attacks that target
   communication and collaboration environments in addition to email. Email and
   collaboration security are key elements of Microsoft’s extended detection and
   response (XDR) strategy, adding prevention capabilities to its unified
   approach to detection, investigation, response, and remediation. Highlights
   on its roadmap include integrated security training tips and end-user
   “nudges,” enhancing capabilities to disrupt attacks in progress, and further
   optimizing security operations center (SOC) work and investigation flows.
   
   Backed by trillions of native signals and a massive threat research
   organization, Defender for Office 365 delivers protection across all native
   communication and collaboration channels like Teams and SharePoint. It can
   expand to third-party applications like Slack and Box, but with a less
   integrated user experience. It also offers comprehensive DLP and easy-to-use
   email encryption. Though Microsoft supports email authentication protocols,
   it lacks the hosted and managed authentication management and reporting
   services offered by several competitors. Reference customers praised the
   streamlined analyst experience, manual and automated IR capabilities, and
   simple integrations with third-party tools. However, they dinged Microsoft on
   inconsistencies in reporting across dashboards and on the number of malicious
   emails that continue to reach inboxes despite the arsenal of well-regarded
   detection and response capabilities the vendor brings to bear. Organizations
   that are all in on Microsoft’s security offerings should evaluate Defender
   for Office 365’s tightly integrated, continually improving capabilities.
 * Check Point Software Technologies’ novel deployment delivers communication
   and collaboration protection. Check Point acquired CAPES vendor Avanan in
   2021 and has since focused on integrating email security into its platform,
   leveraging its native ThreatCloud threat intelligence capabilities to deliver
   Phishing360 protection across endpoints, browsers, and SaaS applications.
   Check Point is focused on email security as a key area of growth through 2025
   with the goal of, and aligned incentives for, significantly increasing market
   share. Its roadmap addresses many of the gaps it needs to fill to become a
   fuller-service email security solution, like Domain-based Message
   Authentication, Reporting & Conformance (DMARC) monitoring, proprietary
   security awareness and training, and data residency in more geographies to
   support regional regulatory requirements.
   
   Check Point is currently the only enterprise email security vendor to offer
   an in-line CAPES deployment option that works with both Microsoft 365 and
   Google Workspace. This configuration provides gateway-like capabilities like
   spam and graymail filtering, antimalware, and DLP with the power of
   API-enabled deployments like BEC and internal email protection. It is also
   one of the only vendors to provide full protection for communication and
   collaboration applications like Teams, SharePoint, Slack, and Dropbox. Check
   Point doesn’t currently offer its own email authentication capabilities. It
   does offer email incident response services for user-reported malicious
   emails, and customers noted the ease of investigations within one screen in
   the tool. Reference customers tout Check Point’s superior efficacy but noted
   that alerts could use more context. Security and risk pros interested in a
   move to an API-based solution without some standard secure email gateway
   (SEG) features should evaluate Check Point Harmony Email & Collaboration.

Strong Performers
   
 * Trend Micro email security strongly complements its cybersecurity platform.
   Trend Micro’s Vision One cybersecurity platform brings together its XDR
   offering with attack surface risk management and includes both SEG and CAPES
   email security capabilities in its complete but not yet fully integrated
   solution. Trend Micro plans to extend security orchestration, automation, and
   response (SOAR) capabilities with its recent announcement to acquire SOC
   technology provider Anlyz and is currently working to bring its solutions
   together to enhance analyst experience with minimal jumping between toolsets.
   On its roadmap, Trend Micro plans to build a proprietary, human risk-focused
   security awareness and training solution to complement its Phish Insight
   phishing simulation offering.
   
   Trend Micro’s threat intelligence is bolstered by customers’ ability to bring
   in their own feeds and, through its Zero Day Initiative, a vendor-agnostic
   bug bounty program that published over 1,600 advisories in 2022. The vendor
   provides customers with a wide range of AI and heuristic content analysis and
   processing capabilities as well as malicious URL protection and active
   content sanitization to strip files of risky elements and offers protection
   for chat and collaboration in both Microsoft 365 and Google Workspace
   environments as well as other file-sharing apps. Slack is on its roadmap. Its
   email security offerings integrate only with its own endpoint detection and
   response (EDR) and XDR platform, but it does offer API integrations for major
   security information and event management (SIEM) and SOAR solutions.
   Reference customers appreciate Trend Micro’s global customer support and
   strong two-way communication. Organizations interested in ensuring email
   telemetry is fully integrated into their detection and response strategies
   should consider Trend Micro’s suite of offerings.
 * Google’s security-by-design approach is regulation aware. Productivity and
   collaboration infrastructure giant Google sees email security as one piece of
   a larger, baked-in cloud and privacy-focused security strategy, built on its
   BeyondCorp Zero Trust framework. Google is a major supporter of email
   security protocols and open standards that benefit the greater security
   community, like the BIMI standard for verified brand logos. It also offers a
   simple licensing model with options to fit organizations of any size.
   Google’s email and collaboration security roadmap includes further
   enhancements to its phishing simulation capabilities and tighter integrations
   with its security operations suite, Chronicle.
   
   Google recently released an end-to-end, client-side email encryption
   capability that gives customers, especially those with strict regulatory
   requirements, full control of their data. Encryption keys are maintained by
   customers, and data is encrypted prior to moving through Google servers. No
   add-ons are required to send and receive fully encrypted messages. Google
   offers contextually rich dynamic content warning banners to assist users in
   engaging with messages. DLP capabilities cover all Workspace applications, as
   does protection against malicious links and attachments. Outside messaging
   and collaboration apps are covered through its Context-Aware Access offering.
   Integrations with outside EDR and XDR solutions are offered. Reference
   customers noted dissatisfaction with Google’s logging and reporting
   capabilities, preferring to use third-party security analytics tools for
   analysis, investigation, and reporting. Google’s approach to encryption and
   its by-design approach to security are a fit for security and risk (S&R) pros
   in need of privacy-and-compliance-focused email protection for Workspace.
 * Barracuda Networks delivers strong email incident response but a blurry
   vision. Seeing the market shifting back in 2016, Barracuda Networks was one
   of the first legacy SEG vendors to release a CAPES deployment option.
   However, this option does not yet cover Google Workspace. The vendor also
   lacks a cohesive vision beyond further improvements and integrations. It is,
   however, bringing Zero Trust access to its Microsoft 365 CAPES product to
   better protect organizations from account takeovers and MFA exhaustion
   campaigns with passwordless authentication via granular device policies.
   Roadmap highlights include machine learning improvements such as the ability
   for administrators to tune models themselves; modernizing and unifying the
   user experience; and extending protection to Google Workspace and
   collaboration applications like Teams and Slack.
   
   Barracuda’s combined SEG and CAPES offerings deliver phishing and BEC
   protection, including multiple machine learning models, malware detection and
   sandboxing, malicious URL protection, and one-click URL blocking of URLs with
   its incident response capability. The offering does not include browser
   isolation or protection for messaging and collaboration apps. Barracuda
   offers proprietary multilanguage security awareness and training capabilities
   that are well regarded by customers across geographies. Reference customers
   rave about Barracuda’s efficacy — especially against impersonation attempts —
   and built-in incident response capabilities, including SOAR for fast,
   intuitive investigation and remediation activities. The vendor offers limited
   out-of-the-box EDR and XDR integrations beyond its own platform. S&R pros
   looking to manage both email threat prevention and response in a single
   solution should consider Barracuda Networks.
 * Mimecast delivers on malicious URL protection but offers a murky roadmap.
   Mimecast, a longtime cloud-based SEG vendor, rolled out its CAPES deployment
   option in mid-2022. Both deployment options are powered by Mimecast’s X1
   platform encompassing its detection tech, data analytics, threat
   intelligence, and policy engines. It offers a strong Technology Alliance
   partner program delivering shared threat intelligence, signals, and telemetry
   with over 200 applications. Mimecast’s vaguely timed roadmap features
   improvements to awareness training, archiving, DLP, and its DMARC Analyzer to
   bring its CAPES solution up to parity with its SEG. It also includes the
   expansion of its CAPES deployment to Google Workspace.
   
   Mimecast delivers malicious URL protection and web security in a single
   console and offers a proprietary browser isolation solution, but messaging
   and collaboration app protections are roadmap items. It delivers a full
   library of security awareness and training content in addition to its SAFE
   Phish simulation solution that turns blocked malicious messages into
   defanged, simulated phishing assessments. Its hosted DMARC reporting tool and
   services offerings help organizations deploy and maintain optimal
   configuration. Mimecast offers real-time awareness and training with
   contextual warning banners via its CyberGraph social graph model that detects
   anomalies in communication behaviors. Reference customers found Mimecast’s
   reporting capabilities useful and the data easy to export but weren’t as
   bullish on CyberGraph, citing usability and configuration issues that broke
   workflows. S&R pros looking for help with email authentication who can wait
   on roadmap item execution should look at Mimecast’s email security offerings.
 * Tessian focuses on protecting the human layer but is still building out a
   full solution. Tessian got its start protecting end users from themselves
   with a focus on preventing data loss — both accidental and malicious — in
   outbound email communication. It has since evolved to offer inbound and
   outbound protection. Tessian has refined its superior vision to not only
   focus on protecting the human layer but also to frame email security as a
   means to elevate security culture within organizations. Roadmap items include
   expanding DLP capabilities to file-sharing applications; API-integrated
   remediation orchestration with major SIEM, SOAR, EDR, and XDR players; and
   expansion of protection to messaging and collaboration applications.
   
   Tessian’s core capabilities center around its Behavioral Intelligence Model
   (BIM), a social graph that ingests 12 months of historical data for each user
   to understand typical behavior and spot anomalies. It offers a soft email
   quarantine with detected anomalies and delivers real-time security coaching
   to end users in the form of dynamic, contextual warning banners. Though
   Tessian provides more capabilities than other CAPES vendors, it lacks malware
   sandboxing, browser isolation, web security, encryption, and email
   authentication support. Reference customers are happy with Tessian’s support
   and willingness to customize features as well as its easy-to-use interface,
   but they knock elements of its ML-driven solution, namely its user risk
   scoring for being overly generic, and hard and soft quarantine
   inconsistencies. S&R pros interested in linking email security with security
   coaching and culture should consider Tessian as an additional (human) layer
   of protection.
 * Abnormal Security is the added protection you need if you don’t need anything
   else. Abnormal Security was born out of the need for protection against the
   BEC, advanced phishing campaigns, and internal communication threats
   traditional SEGs were not catching. This extra layer of protection brought
   the CAPES vendor to market prominence, but its vision remains firmly grounded
   in its current capabilities with only limited plans to add capabilities
   covered by email infrastructure providers. Abnormal takes a collaborative
   approach to channel partnerships and forms strong technical partnerships,
   like the recently announced bidirectional integration with CrowdStrike for
   greater account takeover protection and the strategic partnership with
   Microsoft that includes co-selling and joint marketing initiatives. Abnormal
   plans to add to its core capabilities with a roadmap that includes protection
   of communication, collaboration, and SaaS applications, as well as its own
   form of DLP and security awareness and training (SA&T).
   
   Abnormal’s single deployment option absorbs six months of email behavior from
   end users, learns what normal looks like, and organizes the collected signals
   into four knowledge bases — application, vendor, tenant, and people. Its
   behavioral AI engine is continuously trained by the malicious emails it
   blocks and by Detection 360°, its direct feedback loop for false positive and
   negative reporting. Customers praise Abnormal for its superior ability to
   block malicious email from inboxes and its ability to combat account
   takeovers and compromised third-party vendors, but this is currently its
   narrow focus. S&R pros heavily invested in the native capabilities of their
   email security infrastructure providers — or those planning to keep an SEG
   for other critical forms of malicious email, file, and attachment detections
   — should evaluate Abnormal Security.
 * Fortinet delivers email security in its platform but doesn’t make it easy.
   Fortinet’s vision of email security going beyond email remains unchanged
   since 2021 and is now limiting. Its definition of “beyond email” includes
   security tooling like EDR, XDR, CASB, and SIEM/SOAR but not the applications
   users employ to communicate and collaborate. The vendor’s focus is on
   furthering integration of FortiMail into its Security Fabric, made up of the
   aforementioned tooling plus threat intelligence and managed security
   services. Notably, Fortinet was the only vendor in this evaluation to place
   emphasis on its hardware email security appliances. On its lengthy roadmap,
   Fortinet plans to expand its CAPES deployment option to Google Workspace,
   offer hosted DMARC monitoring, enhance content analysis with a new image
   engine and QR code scanning, and further integrate with its own platform.
   
   Fortinet offers standard capabilities for email filtering and malicious email
   detection but is not transparent in its communication of how its ML models
   are trained. It offers integrations with sandbox and BIT, but EDR and XDR
   integrations beyond its own platform are limited. Content disarm and
   reconstruction and URL protection are offered in the middle and top pricing
   tiers, and a proprietary phishing simulation tool is available as an add-on.
   Usability remains an issue with cluttered dashboards and outdated user
   interfaces. Additionally, reference customers noted difficulty in configuring
   incident response capabilities and unintuitive interfaces requiring multiple
   drill-downs to complete tasks. Fortinet is a fit for S&R pros invested in the
   Fortinet platform who need managed email security services, those at smaller
   enterprises, or organizations still in need of on-premises or hybrid
   deployments that include physical or virtual appliances.


Contenders
   
 * Sophos continues to build out its email security capabilities but still needs
   some basics. Cybersecurity platform provider Sophos’ vision is to enhance the
   SOC analyst experience across its product portfolio. The vendor plans to
   ensure email security and telemetry, in combination with its MDR and XDR
   offerings, as part of that strategy. Yet its roadmap features a list of
   standard items like future integration with Google Workspace, on-demand email
   claw-back, DMARC reporting, and AI-enabled behavioral profiling through a
   social graph model.
   
   Sophos offers standard filtering and malicious email detection capabilities
   for inbound protection. Its outbound protection includes proprietary DLP and
   encryption capabilities. Insight into Sophos’ machine learning models is
   limited, as is support for web security. Sophos Phish Threat provides
   phishing simulations and security awareness training in the console. Analysts
   can deliver targeted training to risky users via integrations with Azure AD.
   Its email security offering integrates only with Sophos platform
   technologies, not third-party solutions. Dashboards provide good detail, and
   reference customers noted the ease of setup and policy creation in the tool.
   References also remarked on middling customer support and a need for
   encryption improvement. S&R pros leveraging their email infrastructure
   provider’s basic protections — and those who are short-staffed — should
   consider Sophos email security as part of a larger managed security services
   relationship.
 * Cisco brings its offerings into the modern age but relies heavily on third
   parties. Longtime SEG player Cisco released its Email Threat Defense (ETD)
   solution in 2020, which adds a CAPES deployment option for Microsoft 365, and
   integration with its SecureX XDR platform in 2023. The vendor aims to keep
   legacy SEG customers as they migrate to new cloud email security
   infrastructure environments. Email security and the associated telemetry are
   a key element of Cisco’s XDR story. Its staid vision for email security,
   however, focuses on becoming best-in-class by improving detections and on
   aggressive pricing to encourage retention. Cisco plans to internally develop
   capabilities formerly or currently supported by OEM relationships and
   strategic partnerships. Its roadmap includes further modernization like
   automated abuse mailbox monitoring, supply chain compromise monitoring, and
   rolling out a new detection every quarter.
   
   Cisco ETD is backed by its Talos threat intelligence feeds and message
   content analysis. Transparency about model training is lacking despite the
   thorough and easily navigable Cisco Trust Center for product security
   information. Reference customers note SecureX’s usability, with orchestrated
   remediation actions that can easily be taken within the ETD interface. ETD
   does not integrate with third-party EDR or XDR solutions yet uses third
   parties for several key capabilities, like hosted DMARC through a partnership
   with dmarcian and SA&T and DLP through OEM relationships. Messaging and
   collaboration protection is limited to Cisco’s CASB offering under Cisco
   Umbrella. S&R pros in predominantly Cisco shops looking to upgrade legacy SEG
   appliances should evaluate Email Threat Defense integrated with SecureX XDR.
 * Fortra is combining acquisitions into a comprehensive solution but isn’t
   there yet. Fortra, the tech provider formerly known as HelpSystems, made a
   series of email security acquisitions over the past two years. Its vision is
   to stitch together a comprehensive email security solution from Clearswift
   (SEG), Agari (CAPES and email authentication), Terranova Security (SA&T), and
   PhishLabs (threat intelligence). Fortra’s plan is to move these acquisitions
   from separate solutions, to single sign-on, to a unified user interface
   within the next 12 months. This vision is also the focus of Fortra’s
   innovation efforts and roadmap.
   
   Fortra’s standout capability, in its collection of converging solutions, is
   its email authentication technology and services under Agari DMARC
   Protection. This helps customers get to optimal configuration and investigate
   causes of improper configuration in customer and third-party environments.
   Agari DMARC Protection offers threat feeds for domain impersonation that can
   be sent to PhishLabs for takedown, and Agari Phishing Defense delivers
   machine learning-based trust scoring and attack classifications for messaging
   with search-and-destroy capabilities. Additionally, Clearswift offers largely
   standard content analysis and processing, with the exception of its
   anti-steganography capabilities which keep data from being exfiltrated by
   being embedded in pictures or other types of files. The portfolio of loosely
   coupled solutions lacks a cohesive analyst experience and a central dashboard
   for reporting and offers limited EDR and XDR integrations. Forrester was
   unable to reach reference customers Fortra provided for this evaluation. S&R
   pros at organizations in need of help with email authentication should
   investigate Fortra’s converging email security offering.
 * Broadcom has solid outbound protection but is on a long road to a modern
   offering. Symantec was once an email security titan. Its acquisition by
   Broadcom, however, stymied the product suite’s growth and innovation, leaving
   it to languish as competitors, some of which were also acquired, moved
   forward with the development of new capabilities and deployment options. The
   vendor’s weak vision is to start offering the capabilities, such as CAPES
   deployments and advanced phishing and BEC protection, that customers are
   looking for in 2023. Broadcom’s roadmap includes several incremental
   improvements, including improved URL risk scoring, better policy controls,
   and more granular rules to enforce domain age policies.
   
   Broadcom offers standard content analysis and processing, antimalware and
   sandboxing, and malicious URL protection, including web security and browser
   isolation. It also offers comprehensive enterprise and email DLP and delivers
   easy-to-use email encryption through its partnership with Echoworx.
   Additional partnerships fill key functionality gaps, including email fraud
   protection powered by a partnership with email authentication vendor
   Valimail. The Symantec Security View dashboard, which brings together
   telemetry from its email security, CASB, and DLP products, is viewed through
   security analytics vendor Splunk. Reference customers cite poor efficacy and
   outdated consoles but expressed appreciation for the periodic health check
   reports to ensure tooling is properly configured and that customers are
   getting the most out of their investment in the product. S&R pros reliant on
   Broadcom’s comprehensive DLP product should assess the vendor’s Symantec
   Email Security offering.

Evaluation Overview
We grouped our evaluation criteria into three high-level categories:
   
 * Current offering. Each vendor’s position on the vertical axis of the
   Forrester Wave graphic indicates the strength of its current offering. Key
   criteria for these solutions include content analysis and processing, machine
   learning models and training, malicious URL detection and web content
   security, antimalware and sandboxing, and email authentication.
 * Strategy. Placement on the horizontal axis indicates the strength of the
   vendors’ strategies. We evaluated product vision, innovation, roadmap, and
   community.
 * Market presence. Represented by the size of the markers on the graphic, our
   market presence scores reflect each vendor’s revenue and number of customers.

Vendor Inclusion Criteria
Each of the vendors we included in this assessment has:
   
 * Global product revenue over $30 million USD. The vendor has at least $30
   million in email security revenue from two or more geographies.
 * A productized commercial offering. The offering can be delivered as a secure
   email gateway (SEG) or a cloud-native, API-enabled email security solution
   (CAPES), but it cannot be a custom managed or professional service. The
   majority of vendor revenue must come from enterprise sales, not OEMs or MSPs.
   The vendor must offer a product version of the solution that was generally
   available prior to February 23, 2023. Forrester only evaluated capabilities
   released and generally available to the public by this cutoff date.
 * Significant interest from Forrester customers. Forrester considers the level
   of interest and feedback from our clients based on our various interactions,
   including inquiries, advisory, and consulting engagements.

Supplemental Material
Online Resource
We publish all our Forrester Wave scores and weightings in an Excel file that
provides detailed product evaluations and customizable rankings; download this
tool by clicking the link at the beginning of this report on Forrester.com. We
intend these scores and default weightings to serve only as a starting point and
encourage readers to adapt the weightings to fit their individual needs.
The Forrester Wave Methodology
A Forrester Wave is a guide for buyers considering their purchasing options in a
technology marketplace. To offer an equitable process for all participants,
Forrester follows The Forrester Wave™ Methodology to evaluate participating
vendors.
In our review, we conduct primary research to develop a list of vendors to
consider for the evaluation. From that initial pool of vendors, we narrow our
final list based on the inclusion criteria. We then gather details of product
and strategy through a detailed questionnaire, demos/briefings, and customer
reference surveys/interviews. We use those inputs, along with the analyst’s
experience and expertise in the marketplace, to score vendors, using a relative
rating system that compares each vendor against the others in the evaluation.
We include the Forrester Wave publishing date (quarter and year) clearly in the
title of each Forrester Wave report. We evaluated the vendors participating in
this Forrester Wave using materials they provided to us by March 16, 2023 and
did not allow additional information after that point. We encourage readers to
evaluate how the market and vendor offerings change over time.
In accordance with our vendor review policy, Forrester asks vendors to review
our findings prior to publishing to check for accuracy. Vendors marked as
nonparticipating vendors in the Forrester Wave graphic met our defined inclusion
criteria but declined to participate in or contributed only partially to the
evaluation. We score these vendors in accordance with our vendor participation
policy and publish their positioning along with those of the participating
vendors.
Integrity Policy
We conduct all our research, including Forrester Wave evaluations, in accordance
with the integrity policy posted on our website.

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