What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Phishing defense is a combination of controls, not a single product: email security can block or flag suspicious messages, staff reporting and training can help people spot attacks, and phishing-resistant sign-in methods can limit the damage from stolen credentials. These 10 companies cover different parts of that job; they are a non-ranked shortlist, not interchangeable products or a claim that any one can stop every attack.
How to choose among phishing-defense companies
Start with your existing email platform, then identify the gap you need to close. Microsoft and Google document protections built into their cloud email services. Other providers offer additional email security for Microsoft 365, Google Workspace, or mixed environments. Training and authentication products address different risks and should not be mistaken for email filtering.
- Message protection: Check coverage for spoofing, impersonation, business email compromise (BEC), malicious links and attachments, and what happens when a threat is found after delivery.
- Broader channels: Ask whether protection extends to QR codes, collaboration tools, text messages, or social platforms if those are in scope for your organization.
- Deployment and operations: Confirm whether the service is native, API-based, gateway-based, or hybrid, and how it fits your mail environment and administration practices.
- People and accounts: Consider whether you need phishing tests and training, suspicious-message reporting, or stronger authentication in addition to email controls.
The available product descriptions do not establish comparable pricing, false-positive rates, implementation effort, or independently measured detection efficacy. Treat vendors’ performance statistics as their own claims, not as a head-to-head ranking.
10 companies and what they offer
| Company | Role and documented focus | What to verify |
|---|---|---|
| Microsoft | Native cloud-mail protections; Microsoft Defender for Office 365 adds configured impersonation protection, campaign views, and attack simulation training. | Features depend on service and plan; check your tenant’s entitlement. |
| Gmail and Google Workspace controls for warnings, spam, attachments, links, external images, spoofing, and authentication. | Confirm the controls available and configured for your Workspace environment. | |
| Proofpoint | Cloud email security addressing phishing, BEC, account takeover, malware, and credential theft across the email lifecycle. | Evaluate the protection and workflow fit; its published efficacy figures are vendor claims, not independently validated comparisons here. |
| Mimecast | Email lifecycle protection and remediation, contextual risk banners, QR-code phishing and BEC coverage; describes Microsoft 365, Google, on-premises, and hybrid deployment options. | Verify integration and configuration fit for your environment. |
| Cloudflare | Describes protection against phishing, BEC, malware, and ransomware across email and collaboration or messaging channels such as Slack, Microsoft Teams, SMS, and social platforms. | Its described deployment approaches include inline via MX records, API for Microsoft 365 and Google Workspace, or hybrid; confirm fit. |
| Cisco | Secure Email Threat Defense describes protection for phishing, BEC, malicious QR codes, ransomware, and account takeover. Cisco distinguishes a cloud-mailbox-oriented service from ETD Advantage gateway protection for pre-delivery inspection. | Confirm the right product and subscription are available for your geography and environment. |
| Barracuda | Integrated Email Protection is described as API-based for Microsoft 365 and Google Workspace, with analysis of message intent, links, identity behavior, and content, plus post-delivery detection and automated response. | Check how its API integration and response actions fit your tenant and policies. |
| KnowBe4 | Offers awareness and simulation services, including phishing tests and training; its separate Defend product is described as inbound threat defense for Google, Microsoft, and Teams. | Distinguish the Defend email product from training, simulations, and reporting workflows. |
| Okta | FastPass and FIDO2 WebAuthn passkeys are documented as phishing-resistant authenticators. This is an identity control, not an email gateway. | Check supported devices, identity engine, and application policies. |
| Abnormal Security | A 2025 KuppingerCole Leadership Compass report hosted by Cisco describes its solution as cloud-native and API-based, integrating with Microsoft 365 and other security analytics tools. | The cited description is from an industry report rather than a current official product page; verify current product scope. |
Which options fit Microsoft 365 or Google Workspace?
If you use Microsoft 365, first review the protection already included with your cloud-mail service and the features available in your current plan. Microsoft says all organizations with cloud mailboxes have built-in spoof intelligence, anti-phishing policies, and implicit email-authentication protections. Microsoft Defender for Office 365 adds capabilities such as configured impersonation protection and attack simulation training, depending on service and plan. Microsoft’s documentation defines phishing as “an email attack that tries to steal sensitive information in messages that appear to be from legitimate or trusted senders.” Microsoft Learn: Anti-phishing protection.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems#1 Best Overall
- POWERFUL SECURITY KEY: The YubiKey 5 NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
For Google Workspace, Google’s administrator documentation describes default Gmail warnings and spam placement alongside configurable controls for attachments, links, external images, spoofing, and authentication. Several listed providers also describe products or deployments for Google Workspace, but their stated coverage and deployment models differ; confirm the specific integration and controls you need with each vendor.
Google Workspace’s product page says that more than 99.9% of spam, phishing attempts, and malware are automatically blocked in Gmail. That is a Google-published claim, not an independent audit or a guarantee for an individual organization. Google also reports an 84% increase in email-delivered infostealers in 2024 compared with the previous year; it is a Google-reported year-over-year comparison, not a measure of any one product’s performance. Google Workspace security.
Rank #2
- Security Key : Protect your online accounts against unauthorized access by using FIDO2 and U2F authentication with T110. It's the world's most protective security key that works with windows, Mac OS, Linux as well as Chrome, Firefox, Edge and many other major browsers.
- Certified with the new FIDO2 standard, T110 provides the benefit of fast login and strong protection against phishing, account takeover as well as many other online attactks.
- Works with : Bank of America, Github, Google, Microsoft, DUO, Twitter, Facebook, Dropbox, Apple, ebay, BINANCE, mor and more.
- Fits USB-A port : Insert the T110 security key into the USB-A port of each service and log in conveniently with one touch
- For the driver download and user guide, please visit TrustKey Solutions Home support page.
Do you need email security, phishing training, or both?
Email filtering and awareness programs address different parts of the problem. Filtering aims to stop or flag suspicious messages; training and simulation help users practice recognizing and reporting suspicious activity. Microsoft documents attack simulation training as part of Defender for Office 365. KnowBe4 documents phishing tests and training notifications, a suspicious-message reporting button, and Google Workspace integration, as well as its distinct Defend inbound email product. Decide whether you need one or both functions rather than treating a training service as a mail gateway.
How phishing-resistant authentication helps
A phishing-resistant authenticator can reduce the usefulness of a password or sign-in credential captured by a fake login page. Google mentions passkeys and FIDO2 security keys among account-protection measures; Okta documents FastPass and FIDO2 WebAuthn passkeys as phishing-resistant authenticators. These controls protect sign-in workflows rather than filtering email. Before adopting a security key or passkey approach, check device support, identity-provider compatibility, and your organization’s access policies.
Rank #3
- A FIDO security key with PUF technology provides a unique, hardware-rooted trust anchor that resists tampering and cyber attacks, offering stronger security than conventional designs.
- FIDO2 Certified Protection – Enjoy phishing-resistant security with FIDO2 certification, ensuring top-tier account safety across Windows, macOS, Linux, iOS iOS, Android and more.
- Easy to use & Portable – Designed with a compact USB-C interface, Clife key fits easily on your keychain for secure access anywhere. Simply plug in and authenticate with ease.
- Universal Compatibility – Works seamlessly with hundreds of FIDO2/U2F compliant services, including popular cloud, email, and social platforms.
- Backup recommended – To ensure continuous access, register a backup Clife security key as a spare in case your primary key is lost.
How to compare vendors before choosing
- Map your current setup. Record your mail platform, plans, identity provider, and any existing filtering, training, reporting, or authentication controls.
- Name the gap. Decide whether you need stronger spoofing and impersonation controls, BEC coverage, malicious-link or attachment analysis, post-delivery remediation, QR-code protection, or coverage beyond email.
- Check the deployment model. Ask how the product connects to your mail service and what administrative changes, integrations, and response permissions it requires.
- Separate feature claims from proof. Request evidence for the specific threats and conditions relevant to you. Vendor product descriptions and performance claims are not equivalent to independently comparable test results.
- Validate scope before purchase. Confirm current licensing, product naming, geographic availability, integrations, and which features are included in the subscription you would use.
Google and Proofpoint publish numerical efficacy claims on product pages, but the available material does not establish independent validation or comparable methodologies. Use those figures as attributed vendor claims, not as a basis for ranking providers.
Quick Recap
Best Value
- Ultra-Compact FIDO2 Security Key - Plug-and-stay or carry on a keychain. This USB-A hardware security key offers portable, always-on protection for desktop and mobile use. (Item Size: 0.75 X 0.74 IN x 0.25 IN)
- USB-A Hardware Key for All Devices - Works with USB-A ports on PC, Mac, Android, and other laptop/notebook device. Enables secure, cross-platform login with FIDO2.0 passkey support.
- FIDO Certified Security Key - Meets FIDO and FIDO2 standards. Works with Google, Microsoft, GitHub, Dropbox, and more. Please check service compatibility before purchase.
- Passwordless Login with Passkey - Supports passkey login via WebAuthn and CTAP2. Enjoy password-free sign-ins where supported. Not all websites or services currently support passkeys.
- Advanced Multi-Factor Authentication - Offers 200 FIDO2 passkey slots and 50 OATH-TOTP slots. Strong, flexible 2FA/MFA support across various apps and authentication platforms.
Rank #4
- POWERFUL SECURITY KEY: The YubiKey 5C NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5C NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
