Most teams discover their email security gaps during incident response after a wire fraud attempt, not from a quarterly phishing test. The same blind spots repeat everywhere: DMARC alignment failures on parked domains, risky OAuth grants that quietly persist for years, and image or QR-code lures that sail past link scanners. The costliest assumption is that native controls catch everything and post-delivery remediation is optional.
The 2026 loss data says otherwise. The FBI's 2025 Internet Crime Report, published in April 2026, recorded $20.9 billion in total losses across more than a million complaints, up 26 percent year over year. Business email compromise alone accounted for $3.05 billion from 24,768 complaints, making it the second most financially damaging crime category, and 86 percent of those losses moved by wire or ACH, which is to say they were usually gone before anyone noticed. Add phishing and government impersonation and email-origin fraud exceeds $4 billion, roughly 19 percent of all reported losses and up 46 percent from 2024.
What makes BEC hard is what it lacks: no malicious link to detonate, no attachment to sandbox, no domain to block. Verizon's 2026 DBIR still puts the human element in 62 percent of breaches, and IBM's most recent report puts the average breach at $4.44 million globally and $10.22 million in the US. This guide compares Proofpoint, IRONSCALES, Material Security, and FortiMail on how they handle that gap.
Email Security Platforms at a Glance
| Platform | Best for | Pricing model | Standout |
|---|---|---|---|
| Proofpoint | Large enterprises with complex mail flows | Enterprise subscription, quoted | Deep policy control plus an MSP path via Hornetsecurity |
| IRONSCALES | API-first protection with user engagement | Annual per user, marketplace listings available | Agentic architecture with red teaming and SOC agents |
| Material Security | Post-delivery detection plus inbox data controls | Published starting prices per user | Treats the mailbox as a data store, not just a channel |
| FortiMail | Hybrid, on-premise, and Fortinet estates | BYOL, PAYG, appliance licensing | SEG and ICES paths under one portfolio |
How We Evaluated These Platforms
Email security efficacy claims are nearly impossible to compare from marketing pages. Every platform here was assessed on:
- Predelivery versus post-delivery coverage: whether the tool can pull a message back after it lands, and how fast, since payload-free BEC often passes inbound checks cleanly.
- BEC and impersonation detection: identity and behavioral signals rather than link and attachment analysis, because the highest-loss attacks carry neither.
- Deployment model fit: API-native for cloud mailboxes, gateway for hybrid or regulated mail flows, or both.
- Identity and OAuth visibility: app-consent abuse grants durable inbox access without ever sending a phish, and most email tools cannot see it.
- Admin workload: tuning effort, alert volume, and whether analyst workflow support exists or investigations happen in a search bar.
- User-report triage: how reported messages get clustered, investigated, and remediated without consuming an analyst's day.
The 4 Best Email Security Platforms
1. Proofpoint
Proofpoint combines predelivery controls with post-delivery detection and remediation across phishing, BEC, ransomware, and impersonation, deployable as a cloud service or a gateway. It serves more than 80 of the Fortune 100 and over 10,000 large enterprises.
Best for: Large enterprises that want granular policies, layered URL and attachment analysis, and mature quarantine workflows across complex mail flows.
Key features:
- Targeted attack protection for malicious links and files with click-time rewriting and sandbox analysis
- Impostor and BEC detection using identity and behavioral signals rather than payload inspection alone
- Automated user-reported phish triage with post-delivery remediation across mailboxes
- Hornetsecurity, acquired for $1.8 billion and closed in December 2025, now operates as a dedicated MSP and SMB business unit with the 365 Total Protection platform serving 12,000-plus MSPs and 125,000 customers
- Platform positioning extended in 2026 to cover AI agents alongside people and data across email, cloud, and collaboration tools
Why we like it: Depth of policy control and visibility lets large teams tune aggressively without breaking mail flow, which is what shortens time from report to remediation during a live campaign. The Hornetsecurity acquisition also changes the calculus for smaller buyers: Proofpoint used to be an enterprise-only answer, and now there is a genuine multi-tenant MSP path with backup, compliance, and awareness training bundled in.
Limitations:
- Admin complexity and tuning effort are the most consistent themes across third-party reviews
- Cost is regularly cited as premium in mid-market evaluations, and the enterprise SKU is not sized for small teams
- Some reviewers report support response variability during heavy incidents, which is precisely when it matters
- Two overlapping product lines now serve different segments, so confirm which platform your quote actually covers
Pricing: Not publicly available. G2 shows a free trial indicator for the Core Email Protection SKU. Contact Proofpoint for a quote based on mailboxes and modules, or a Hornetsecurity partner for MSP and SMB packaging.
2. IRONSCALES
IRONSCALES is an API-based email security platform combining adaptive AI detection with mailbox-level remediation, phishing simulation, and user engagement. It protects more than 17,000 organizations and draws signal from a community of 30,000-plus security professionals.
Best for: Organizations that want fast API deployment on Microsoft 365 or Google Workspace, with strong user-report triage and automated cleanup.
Key features:
- AI-driven phishing, BEC, and account takeover detection with mailbox-level remediation across affected inboxes
- Three AI agents introduced in the Winter 2026 release: a Red Teaming agent for reconnaissance, a Phishing SOC agent that automates triage and response workflows, and a Phishing Simulation agent that generates continuous simulations tailored to individual employees
- Built-in outbound email encryption with policy-driven automatic encryption of regulated content
- Expanded deepfake defense for Microsoft Teams, plus QR code detection for quishing campaigns
- Threat pattern clustering and campaign conversion, with dynamic banners that train users in the flow of work
Why we like it: API setup takes minutes rather than a mail-flow migration, and the user feedback loop genuinely improves signal quality over time, which cuts SOC toil on recurring campaigns. The 2026 agent architecture is the more interesting development: automating triage and generating personalized simulations addresses the two tasks that eat the most analyst and admin time in this category.
Limitations:
- Reviewers note occasional false positives and feature gaps in lower tiers
- Costs stack as modules are added, so price the tier that includes what you actually need
- Training depth varies by content pack and configuration
- API-only means no gateway option, so hybrid or on-premise mail flows need a different tool
Pricing: Cloud marketplace contracts have listed 50-user annual examples such as Email Protect around $4,200 per year and Complete Protect around $6,000 per year, with a 50-user minimum, which works out to roughly $7 to $10 per user per month at that size. Request a current quote via marketplace or sales.
3. Material Security
Material Security is an automated detection and response toolkit for Google Workspace and Microsoft 365 that combines email security, data security, identity protection, and configuration management in one platform. Its distinguishing idea is treating the mailbox as a data store to defend rather than only a delivery channel to filter.
Best for: Teams that need strong post-delivery detection, sensitive email data controls, and risk reduction for OAuth grants and account takeover.
Key features:
- Post-delivery detection and automated remediation of attacks that bypass traditional controls, without rule-set maintenance
- Sensitive content detection across email and files, with automated remediation of excessive permissions and inappropriate sharing
- Account takeover detection that limits blast radius by securing sensitive data, reducing credential sprawl, and closing MFA gaps
- Configuration and access risk insights across accounts, groups, and tenants in both Workspace and Microsoft 365
- AI-powered investigation and response for automated user-report triage
Why we like it: Every other tool here asks whether a message is malicious. Material also asks what an attacker would reach if they got in, which is the question that actually determines damage. Years of archived mail sitting in a compromised mailbox is a data breach waiting to be indexed, and the OAuth angle matters too: app-consent abuse grants durable inbox access without sending a single phishing email, so no amount of message filtering will catch it.
Limitations:
- Reviewers mention dense or complex navigation in some modules
- Configuration takes time as policies are tailored per business unit
- Reporting depth varies by feature set and tier
- Its public review base is smaller than the incumbents in this category, so peer benchmarks are thinner during evaluation
Pricing: G2 has displayed starting prices of $4 per user per month for Essentials and $6 for Advanced, billed annually, with ATO Resilience listed as contact-us. Enterprise quotes vary by scope and integrations.
4. FortiMail
FortiMail is Fortinet's email security line, now branded FortiMail Email and Workspace Security. It spans a traditional secure email gateway available as physical, virtual, or cloud images, and FortiMail Workspace Security, the former Perception Point, which adds ICES-style protection for cloud mailboxes, browsers, and collaboration apps.
Best for: Hybrid and on-premise environments, regulated sectors needing tightly controlled or isolated deployments, and Fortinet shops standardizing on the Security Fabric.
Key features:
- Anti-spam, phishing, malware, and ransomware protection with machine learning and outbreak detection, backed by FortiGuard intelligence
- DLP and identity-based encryption with policy-driven compliance controls mapped to SOX, GLBA, HIPAA, and PCI DSS
- FortiSandbox integration for deep file and URL analysis
- FortiMail Cloud SaaS as an integrated cloud email security layer scanning traffic on Microsoft 365 and Google Workspace, deployable alongside or instead of the gateway
- Collaboration and browser security across the wider workspace, and Security Fabric integration so an indicator seen in email can immediately inform FortiGate at the network layer
Why we like it: Mature gateway controls plus genuinely flexible deployment make this the practical answer for hybrid mail flows and environments requiring network isolation, which the API-native tools simply cannot serve. The Fabric integration is a real advantage for existing Fortinet customers: correlating an email indicator with network and endpoint enforcement in one policy domain is work you would otherwise do manually in a SIEM.
Limitations:
- Reviews flag a learning curve, dated UI, and more tuning time than newer API-native tools
- Documentation and setup can feel heavy according to marketplace feedback
- Cloud service feature parity has lagged on certain options relative to the appliance
- The portfolio now spans SEG and ICES products with overlapping names, so scope exactly which components a quote includes
- Fortinet was placed as a Challenger rather than a Leader in the 2025 Gartner Magic Quadrant for Email Security
Pricing: Public cloud options include BYOL and PAYG; one Enterprise ATP PAYG image has listed software fees starting around $0.99 per hour plus compute. Appliance and perpetual licensing run through partners. Request a quote for final pricing.
Detection and Response Comparison
| Platform | BEC detection approach | Post-delivery remediation | Deployment model |
|---|---|---|---|
| Proofpoint | Identity and behavioral signals plus layered analysis | Yes, with automated user-report triage | Cloud or gateway |
| IRONSCALES | Adaptive AI with VIP and ATO signals | Yes, mailbox-level automated removal | API only |
| Material Security | Behavior and identity context | Yes, automated with AI investigation | API only |
| FortiMail | Rules and ML, plus ICES layer for cloud mailboxes | Available via Workspace Security, limited on SEG | Appliance, virtual, cloud, or API |
Coverage Beyond the Inbox
| Platform | OAuth and identity risk | Data protection | Collaboration coverage |
|---|---|---|---|
| Proofpoint | Account compromise signals | DLP and compliance modules | Cloud and collaboration tools |
| IRONSCALES | Account takeover detection | Outbound email encryption | Teams deepfake defense |
| Material Security | OAuth inventory, MFA gaps, credential sprawl | Sensitive content in email and files, sharing controls | Workspace configuration across tenants |
| FortiMail | Account takeover protection | DLP, encryption, archiving | Browser and collaboration security |
Strategic Decision Framework
| Critical question | Why it matters | What to evaluate | Red flags |
|---|---|---|---|
| Do you need SEG, API, or hybrid? | Cloud mailboxes changed what the gateway is for | Native stack gaps, latency tolerance, internal mail scanning | One-size-fits-all gateway claims for pure cloud |
| How will you handle post-delivery? | BEC and text-only phish routinely pass predelivery checks | Remediation speed, user-report triage, cross-mailbox pull | Manual search-and-delete at scale |
| Can the tool see OAuth and identity risk? | App-consent abuse grants inbox access with no phish at all | OAuth inventory, risky grant detection, ATO signals | No visibility beyond inbound SMTP |
| What happens to data already in the mailbox? | A compromised inbox is a searchable archive of your business | Sensitive content detection, access controls, sharing remediation | Filtering only, with no view of stored content |
| What is your total admin effort? | Efficacy is wasted if nobody can tune or act fast | Policy complexity, investigation workflow, alert noise | Heavy tuning with no analyst workflow support |
Problems & Solutions
-
Problem: BEC targeting accounts payable with lookalike domains and vendor invoice changes, carrying no payload to detect.
Solution: This is the $3.05 billion problem, and it needs identity and behavioral signals rather than link analysis. Proofpoint applies impostor detection tuned to finance workflows; IRONSCALES detects VIP and ATO patterns and pulls messages across mailboxes post-delivery; Material Security adds identity-aware workflows that catch vendor fraud lacking any clear payload. Given that 86 percent of BEC losses move by wire or ACH, remediation speed matters more here than in any other scenario. -
Problem: QR-code and image-based phishing that evades standard URL filters.
Solution: Quishing works by moving the payload out of the scannable text layer entirely. IRONSCALES lists QR code detection with deep URL scanning; Proofpoint and FortiMail rely on layered file and URL analysis with sandboxing to flag indirect delivery; Material Security shortens exposure time through post-delivery detection and automated removal once the campaign is identified. -
Problem: Risky OAuth grants and app consent that provide durable inbox access without a phish ever landing.
Solution: This is the gap most email security tools structurally cannot close, because nothing malicious was ever delivered. Material Security is the option here with OAuth inventory, risky grant detection, MFA gap analysis, and configuration risk across tenants. The others focus on message-level threat detection, so pair them with identity governance and API-level telemetry if app-consent abuse is in scope. -
Problem: Choosing between gateway and API approaches during a cloud migration.
Solution: Most teams run hybrid during transition, and that is a reasonable answer rather than an indecisive one. Proofpoint and FortiMail fit where gateway control, hybrid mail flow, or isolated deployment is required, and FortiMail now offers both a SEG and an ICES path under one portfolio. IRONSCALES and Material Security fit where API speed and post-delivery coverage matter most. Evaluate admin workload and remediation latency against your actual risk tolerance rather than the deployment diagram. -
Problem: AI is making attacks convincing enough that awareness training alone stops working.
Solution: The FBI logged more than 22,000 complaints with an AI nexus in 2025 and $893 million in associated losses, and openly notes the real figure is higher because victims rarely recognize AI involvement. Detection has to assume the message will read as legitimate. IRONSCALES generates continuously updated simulations built around what attackers are actually sending, and its red teaming agent probes your own exposure; Proofpoint and Material Security lean on behavioral baselines that do not depend on the message looking wrong.
The Bottom Line
Email security stopped being one product category some time ago. The strongest outcomes pair native Microsoft or Google controls with a platform that covers both predelivery and post-delivery risk, tuned to your mail flow and identity stack.
If you need gateway depth, hybrid control, or an isolated deployment, FortiMail and Proofpoint are the serious options, and both now offer cloud-native paths alongside the gateway.
If you want API speed, inbox-level visibility, and user-assisted remediation, IRONSCALES delivers with the strongest automation story in this group. If your real concern is what an attacker reaches after they get in, Material Security is the only one here built around that question.
Validate with a time-boxed proof of concept that measures dwell time and cleanup speed against your own mail streams. Detection rates in a vendor deck tell you very little; how fast a malicious message leaves 400 mailboxes tells you everything.
