Best Multichannel Phishing Protection: How to Compare Options
The best multichannel phishing protection is a layered stack, not a single product. Email security covers the inbox, mobile threat defense covers the device, and a messaging-focused platform covers the channel most stacks leave unwatched: SMS, iMessage, WhatsApp and other mobile messaging. If your gateway is strong but employees, customers or members still get “your account is locked” texts, you have a coverage gap, not a tuning problem.
This guide compares the main categories of tools, the named products security teams usually shortlist, and the criteria that separate real cross-channel coverage from a marketing line. We are SmishAlert, so we cover our own platform too, and we say where other tools are the better fit for a given job.
TL;DR
- No single tool covers every channel well. Plan for email security, mobile threat defense and a messaging-specific layer, then check how their alerts reach one SOC workflow.
- Email gateways and awareness platforms lose visibility once an attacker moves the conversation to a phone. That is where most “multichannel” gaps sit.
- Compare tools on channel coverage, reporting friction, campaign correlation, integrations (SIEM, API, ticketing) and deployment on managed, BYOD and executive devices.
- Phishing-resistant authentication, such as FIDO hardware keys, limits the damage when a message does succeed. CISA advises moving away from SMS-based MFA.
- SmishAlert is built for the messaging layer: employee protection, no-app reporting for customers and members, and cross-user campaign correlation.
Table of Contents
- What “multichannel” should mean in a phishing tool
- The five categories of protection you will be comparing
- How the main options compare on cost
- Criteria that separate real coverage from a feature list
- Where SmishAlert fits in a layered stack
- Authentication still matters when a message gets through
- A practical way to run the evaluation
- Try SmishAlert on your own messaging traffic
- FAQ
- Sources
What “multichannel” should mean in a phishing tool
Vendors use the word loosely. A product that scans email and also checks links when a user clicks may call itself multichannel. For a security team, the useful definition is narrower: can you see, analyze and respond to the same attack as it moves between channels?
A typical coordinated attack is not one message. It might begin as an email with a payroll-change request, continue as a text from a spoofed executive number, and end with a credential-harvesting page opened on a personal phone. Each hop lands in a different system, or in none. Our write-up on how SMS and email phishing combine walks through that pattern in more detail.
We use “smishing” for SMS-delivered phishing specifically. Messaging-based social engineering is wider: it includes iMessage and WhatsApp conversations, vendor impersonation, gift card requests and payroll fraud that may never contain a link at all. A tool that only matches malicious URLs misses the attacks that are pure conversation. The difference between the two threat types is covered in our guide to smishing versus phishing.
The five categories of protection you will be comparing
Most shortlists mix products that solve different problems. Sorting them first saves weeks.
| Category | Typical examples | Channels it sees well | Where visibility usually ends |
|---|---|---|---|
| Secure email gateways and API email security | Proofpoint, Mimecast, Abnormal, Microsoft Defender for Office 365 | Email, and in some products collaboration apps | Personal texts, iMessage, WhatsApp |
| Phishing reporting and response | Cofense and similar report-and-remediate tools | Email reported by users | Messages that never touch a corporate mailbox |
| Awareness and simulation | KnowBe4 and similar platforms | Training delivery, simulated email | Real-world attacks on phones, unless simulations extend there |
| Mobile threat defense | Lookout, Zimperium and similar | Managed devices: apps, network, device posture | Reporting by unmanaged users, customers, members |
| Messaging social engineering defense | SmishAlert | SMS, iMessage, WhatsApp and other messaging, reported and filtered | Not a replacement for email gateways |
The product names above are the ones that recur in category roundups and analyst shortlists. Treat the “where visibility usually ends” column as a design tendency, not a verdict on any one product. Confirm current capabilities with each vendor, because mobile and collaboration features change fast.
Email gateways and API email security
This is the foundation, and for most organizations it is already in place. Gateways filter at the mail flow. API-based tools such as Abnormal read mailbox data directly and look at behavioral anomalies. Microsoft Defender for Office 365 is the default for many Microsoft 365 tenants.
They are strong at what they do. They are not designed to see a text message sent to a personal phone. When attackers realize the email path is hardened, moving to SMS is the obvious next step.
Report-and-respond tools
Phishing reporting buttons give analysts a triage queue and automate remediation, such as pulling a message from every mailbox. Cofense is a well-known example. The model works because the mailbox is a shared, centrally controlled system. Phones are not, which is why the same reporting loop needs a different mechanism for texts.
Awareness and simulation platforms
Training changes behavior, but it measures simulated attacks, not the live ones hitting your users. If a platform only simulates email, you learn how people handle email. Our view is that awareness teams get the most value when real reported texts feed back into training, so the examples are from campaigns targeting their own people.
Mobile threat defense
Tools such as Lookout and Zimperium focus on the device: malicious apps, risky networks, OS vulnerabilities, and in some cases phishing link protection. They are a good fit for a managed fleet. They typically depend on enrollment, which leaves out customers, members, students and employees on personal phones who have not installed an agent.
Messaging social engineering defense
This is the layer built for the channel itself. SmishAlert collects suspicious messages, analyzes the message and sender, correlates reports across users, and surfaces coordinated campaigns to the security team. It supports two deployment models: protection and reporting for employees and high-risk users, and app-free reporting for customers, members and students.
How the main options compare on cost
Published pricing is thin in this market, and it is worth being honest about it.
Microsoft Defender for Office 365 is the exception: G2 lists Plan 1 at $2 and Plan 2 at $5 per user per month, with Plan 2 adding threat hunting, automation, attack simulation training and cross-domain XDR. Confirm current figures on Microsoft’s own site before budgeting, since licensing bundles change.
For the remaining products in the table, build your comparison from written quotes and normalize every quote to the same unit: annual cost per protected user, including onboarding, support tiers and any per-executive add-ons.
SmishAlert is sold as an annual per-user subscription, usually after a paid 30-day pilot whose fee is credited toward the first annual subscription. We do not publish a price list. Additional coverage for individual executives is scoped through direct engagement. The pilot exists so your team can judge detection quality on your own users’ messages before committing to a contract.
Criteria that separate real coverage from a feature list
Use these as a scorecard when you run demos. Ask each vendor to show the behavior, not describe it.
1. Channel coverage you can verify
Ask which channels are analyzed, which are only reported, and which are blocked. SMS, iMessage, WhatsApp and RCS behave differently on iOS and Android, and the platform controls what any third-party tool can see. A credible vendor explains these limits plainly. On iOS, for example, on-device filtering and user reporting are different mechanisms with different coverage.
2. Reporting friction
Detection that depends on users forwarding a screenshot to a mailbox will under-report. The best programs make reporting a single action. For customers and members, requiring an app download cuts participation sharply, so app-free reporting matters if you serve a public population such as bank members or students.
3. Analysis and campaign correlation
One reported text is an anecdote. Fifty reports sharing a sender pattern, a lure and a landing domain are a campaign. Ask whether the tool clusters reports across users, whether it links messages to infrastructure, and how fast a new campaign becomes visible to analysts. This is the core of what we built, and you can see live campaign examples on our threat intelligence page.
4. Lure types beyond links
Executive impersonation, payroll diversion, gift card requests and vendor compromise often contain no URL. Ask for detection examples of link-free attacks. If the demo only shows malicious domains, you are looking at a URL scanner.
5. Integrations and evidence
SOC teams need alerts in the tools they already run. Check for SIEM and API integration, ticketing connectors, and exportable incident records. Audit-ready reporting matters in regulated sectors such as finance and healthcare, where you may need to show what was reported, what was decided and when.
6. Deployment across device types
Managed, BYOD and executive devices need different approaches. Ask what is required from the user, what MDM rules apply, and what the privacy model is: what is collected, what stays on the device, and who in your organization can see message content. HR and legal will ask these questions, so get written answers early.
7. Fit for your population
A 1,500-person company with a mobile sales force, a credit union with 80,000 members and a school district with parents as the target audience have different needs. Map each to who actually receives the attacks, not only who is on your payroll.
Where SmishAlert fits in a layered stack
We do not position SmishAlert against your email gateway. We position it beside it, covering what the gateway cannot see. In practice that means:
- Employee messaging protection for staff and high-risk users such as executives, finance, HR and IT administrators, with reporting and on-device iOS message filtering.
- Customer and member scam reporting for banks, credit unions, associations, colleges and school systems, where constituents report suspicious texts without installing an app. See how this works for banks and credit unions.
- Messaging threat intelligence that correlates reports to expose coordinated campaigns and feeds your SIEM or API workflows.
- A partner program for MSPs and MSSPs that want to add messaging coverage to managed services.
Executive impersonation by text is the most common starting point for security teams. Our guidance on protecting employees from executive impersonation via text lays out the controls we recommend.
Authentication still matters when a message gets through
No filter catches everything, so assume some lures will land. What happens next depends largely on your authentication. CISA’s mobile communications best practice guidance recommends FIDO phishing-resistant MFA, preferably hardware security keys, and advises migrating away from SMS-based MFA because it is not phishing-resistant and can be intercepted by threat actors with access to telecommunications networks.
That pairs with detection rather than replacing it. A one-time code harvested by a fake login page works against SMS MFA; it does not work against a bound hardware key. If your administrators also manage servers, the same principle applies there, as in this walkthrough of SSH key authentication. For the attack mechanics, see how smishing bypasses MFA.
A practical way to run the evaluation
- Inventory exposure. List who is targeted by text today: executives, finance, help desk, customers, members. A workforce exposure assessment is a structured way to do it.
- Define the gap. Write down which attacks you have seen that your email stack did not log.
- Shortlist by category. Pick one candidate per category you lack, not five from the same category.
- Pilot on real users. Run 30 days with the groups from step 1. Measure reports per user, time to analyst triage and campaigns identified.
- Test the workflow. Confirm alerts reach your SIEM and that your incident process can use the output.
- Decide on cost per protected user across the whole stack, not per tool.
Measure outcomes you can defend to a board: report rate, median time from first report to campaign confirmation, and number of coordinated campaigns identified. Avoid vanity numbers such as messages scanned.
Try SmishAlert on your own messaging traffic
If your team lacks visibility into text-based attacks, the quickest way to size the problem is a pilot. We deploy to employees and executives, or open app-free reporting to customers and members, and show you what is arriving. Review the SmishAlert product or contact us through smishalert.ai to scope a 30-day pilot.
FAQ
What is the best method to protect against phishing attacks?
Use layers. Phishing-resistant authentication such as FIDO hardware keys limits what a stolen credential can do, which is the control CISA emphasizes. Pair it with email security, a way for users to report suspicious messages on every channel and analysts who can correlate those reports.
Does email security stop smishing?
Not by design. Email gateways inspect mail flow, and a text sent to a personal phone never passes through it. Organizations need reporting or filtering on the mobile channel, plus a way to link text campaigns to related email activity.
Do I need mobile threat defense and a messaging platform both?
Often yes, because they answer different questions. Mobile threat defense protects enrolled devices from malicious apps and risky networks. A messaging platform captures reported social engineering from employees and from people who are not enrolled at all, such as customers, members and students.
How should I compare pricing across phishing protection tools?
Normalize every quote to annual cost per protected user, including onboarding and add-ons. Microsoft Defender for Office 365 has listed per-user pricing, while most specialist vendors quote on request. A paid pilot, like the 30-day one we offer, lets you test value before you commit.
Sources
- CISA, Mobile Communications Best Practice Guidance (December 18, 2024)
- G2, Microsoft Defender for Office 365 pricing