Best Email Security Software

There is no scored "best email security software" on SecurityChecklist yet. For most companies, auth records before gateways decide whether you need a behavioral email platform, a human-risk training stack, a DMARC control plane, or all three as leftover work.

Open requirements workflow →Business Security hub

N/PubDraft · noindex

Direct answer (claim-safe)

Pack-verified diligence set (unscored): Abnormal when API-based inbound email security against BEC, phishing, and account takeover is the job; KnowBe4 or Hoxhunt when continuous security awareness and phishing simulation is the leftover work (not a mail gateway substitute); EasyDMARC when DMARC/SPF/DKIM/BIMI reporting and enforcement automation is the gap. Scores stay N/Pub.

Inventory ID: E064
Cluster: Email security
Editorial score: N/Pub (null) until E006 score gate clears; never invent a numeric ranking.
Indexation: noindex, follow=false · excluded from sitemap
Conversion intent (not a ranking input): Demo or referral lead

Paid email security does not replace mailbox hygiene and domain authentication. Finish these before demos.

Free and built-in email controls before paid platforms

Publish SPF and DKIM for every sending domain, then start DMARC at p=none with reporting mailboxes you actually read
Turn on MFA for every mailbox and admin role in Microsoft 365 or Google Workspace
Disable legacy auth and unused mail forwarding rules that bypass MFA
Train one owner to triage user-reported phishing before buying another console
Open the email security assessment and DMARC readiness tool to capture stack gaps before vendor calls

Buyer-fit scenarios (unscored)

Shortlist by leftover job after free controls, not by homepage "AI email" badges. KnowBe4 and Hoxhunt packs describe human-risk and awareness platforms; do not treat them as inbound gateways.

Cloud mailboxes that still get BEC and ATO after native filters: include Abnormal Behavioral Security Platform email scope from the pack (API architecture without agents or MX changes per vendor homepage)
Orgs that need phishing simulations, multi-language training content, and human-risk analytics: include KnowBe4 AI-Native SAT scope
Teams that want adaptive simulations across email/SMS/phone/Teams plus reported-phish triage automation: include Hoxhunt
Domains stuck below DMARC enforcement with multi-domain reporting needs: include EasyDMARC business packages

Feature comparison outline (claim-safe)

Compare on jobs: inbound behavioral detection vs human-risk training vs authentication enforcement. Do not invent catch-rate percentages or ranked winners.

EasyDMARC pack publishes Plus from $44.99/mo ($35.99/mo billed annually) and Premium from $89.99/mo ($71.99/mo billed annually), Enterprise custom (accessed 2026-08-09). KnowBe4 pack lists SAT Foundation for 25-50 seats at $2.40 USD per seat per month on a 3-year MSRP term (vendor May 2026 capture). Abnormal and Hoxhunt packs are quote-only on public USD list prices.

Commercial status is not acceptance

Abnormal, KnowBe4, Hoxhunt, and EasyDMARC packs mark commercial status as application_pending. Public partner pages are not SecurityChecklist program acceptance and never feed editorialScore.

Evidence

Vendor evidence status

Draft packs from E006. Conflicted or missing slots block scores. Public partner pages are not program acceptance.

Abnormal Security
Source packN/Pub
Pack status: draft. Claim slots: 7 verified, 0 conflicted, 0 missing. Pricing status: quote_only. Commercial status: application_pending. Editorial score: N/Pub. Score gate ready: no.
KnowBe4
Source packN/Pub
Pack status: draft. Claim slots: 6 verified, 0 conflicted, 0 missing. Pricing status: public. Commercial status: application_pending. Editorial score: N/Pub. Score gate ready: no.
Hoxhunt
Source packN/Pub
Pack status: draft. Claim slots: 7 verified, 0 conflicted, 0 missing. Pricing status: quote_only. Commercial status: application_pending. Editorial score: N/Pub. Score gate ready: no.
EasyDMARC
Source packN/Pub
Pack status: draft. Claim slots: 7 verified, 0 conflicted, 0 missing. Pricing status: public. Commercial status: application_pending. Editorial score: N/Pub. Score gate ready: no.

Claim ledger

Pack-verified citations used on this draft

Only E006 verified evidence rows. Conflicted slots are omitted. evidenceLabel stays unverified until reviewer approval.

Abnormal Security · abnormal:product-scope
Abnormal positions a Behavioral Security Platform with Email Security to stop BEC, phishing, and account takeover, plus related Identity Security, AI Security, and Insider Threat capabilities; homepage emphasizes cloud-native API architecture that activates without agents or MX changes.
Source (official, accessed 2026-08-09): https://abnormal.ai/
- Add-on modules beyond inbound email security may require separate purchase; SecurityChecklist has not independently tested Abnormal.
Abnormal Security · abnormal:admin-identity
Abnormal's December 2021 product security blog, in the portal session-security section, states that Abnormal supports Okta for both SSO and MFA, and describes expanded role-based access controls that let customers restrict access to specific tenants and administrative functions by assigned roles and permissions.
Source (official, accessed 2026-08-10): https://abnormal.ai/blog/commitment-security-privacy
- Blog dated December 2021; re-check before publication that Okta SSO/MFA remains current for the commercial portal SKU.
- No public step-by-step IdP configuration guide; support Knowledge articles for SSO/SAML/SCIM remain login-walled.
- Public SCIM console provisioning documentation was not found; do not claim SCIM from this slot.
Abnormal Security · abnormal:admin-identity
Abnormal What's New (5 Feb 2026) documents role-based access control for platform integrations, extending existing portal RBAC so customers can grant full or no access and scope privileges organization-wide or per tenant for who can view and manage third-party integrations.
Source (official, accessed 2026-08-10): https://abnormal.ai/platform/whats-new/platform-integrations-rbac
- Documents RBAC admin controls for integrations; does not by itself document SAML/SCIM IdP setup steps.
Abnormal Security · abnormal:pricing-transparency
Abnormal homepage and trust surfaces route commercial buyers to See It in Action / demo engagement rather than publishing a self-serve public rate card; pricing treated as quote-only as of this check.
Source (official, accessed 2026-08-09): https://abnormal.ai/
- Third-party proposal or marketplace unit prices are not treated as Abnormal official list pricing.
KnowBe4 · knowbe4:product-scope
KnowBe4 AI-Native Security Awareness Training combines training content in 35+ languages, AI-generated phishing and vishing simulations, Real-Time Coaching, and SmartRisk analytics for continuous human-risk reduction.
Source (official, accessed 2026-08-09): https://www.knowbe4.com/products
- Vendor product marketing; add-ons such as PhishER Plus are separate SKUs.
KnowBe4 · knowbe4:pricing-transparency
KnowBe4 publishes MSRP USD monthly pricing per seat on a 3-year term; SAT Foundation for 25-50 seats is listed at $2.40 USD per seat per month (pricing as per May 2026 on vendor page).
Source (official, accessed 2026-08-09): https://www.knowbe4.com/pricing
- List pricing may vary by region; taxes and discounts not included.
- Re-check before publication; vendor pricing is volatile.
Hoxhunt · hoxhunt:product-scope
Hoxhunt Human Risk Management Platform automates adaptive phishing simulations (email, SMS, phone, Teams), security awareness training, and AI-powered SOC busywork reduction for user-reported phishing triage.
Source (official, accessed 2026-08-09): https://www.hoxhunt.com/
- Vendor product marketing; module scope depends on purchased plan.
Hoxhunt · hoxhunt:pricing-transparency
Hoxhunt homepage and partner pages offer Request demo / Become a partner flows but publish no public USD per-user list prices on the pages reviewed.
Source (official, accessed 2026-08-09): https://www.hoxhunt.com/
- Quote-only status confirmed; contract pricing requires sales engagement.
EasyDMARC · easydmarc:product-scope
EasyDMARC business packages manage DMARC, SPF, DKIM, and BIMI in one platform with aggregate/failure reporting, automation toward enforcement, managed DMARC/BIMI/DKIM options, DNS and SIEM integrations, and email investigation tools.
Source (official, accessed 2026-08-09): https://easydmarc.com/pricing/easydmarc/businesses
- Feature availability varies by Free/Plus/Premium/Enterprise tier.
- SecurityChecklist has not independently tested EasyDMARC.
EasyDMARC · easydmarc:pricing-transparency
EasyDMARC publishes Plus from $44.99/mo ($35.99/mo billed annually) and Premium from $89.99/mo ($71.99/mo billed annually), with Enterprise as Custom; prices exclusive of taxes and vary by email volume, domains, features, and support.
Source (official, accessed 2026-08-09): https://easydmarc.com/pricing/easydmarc/businesses
- Listed prices are starting points tied to volume/domain selections; re-check before publication.

Methodology and limitations

SecurityChecklist keeps editorialScore null (N/Pub) and evidenceLabel unverified on these drafts. Commercial status is not program acceptance. Affiliate or lead payout never sets shortlist order. Re-check volatile pricing before any purchase decision. Abnormal admin-identity is pack-verified for portal Okta SSO/MFA and RBAC (ISS-E006-04); public SCIM console docs were not found. KnowBe4 and Hoxhunt remain human-risk diligence, not gateway substitutes.

Publication gates

What still blocks indexation

Money pages remain noindex until every blocker below clears with dated sources.

editorialScore null / N/Pub until reviewer-approved evidence packs
evidenceLabel remains unverified on public money pages
Partner applications (E007) unfinished; public partner pages are not acceptance
INDEXABLE_PATHS must not include business-security money routes
Featured vendor packs still unverified or conflicted for: abnormal, knowbe4, hoxhunt, easydmarc

Related drafts

More in Email security

Cross-links stay inside the noindex enterprise surface.

Who should not buy / use this page yet

Anyone who needs a published editorial score or ranked winner before deciding
Teams that have not finished MFA on mailboxes and basic SPF/DKIM/DMARC reporting
Buyers who treat awareness training SKUs as a replacement for inbound email controls
Organizations that treat affiliate or partner pages as product endorsement scores

Affiliate or lead payout never sets editorial score. See enterprise methodology (also a noindex draft).