Best Email Security Software 2026: Reviews & Comparisons

Compare business email security by M365 and Workspace coverage, DMARC, small-team fit, response, deployment and published plan limits.

Choose the buying situation first: cross-platform email protection, Microsoft 365, Google Workspace, DMARC, a small organization, or incident response. The map recorded 12 exact query occurrences for “email security” and 7 for “phishing protection”; “business email security” appeared 0 times.

Start with the general email security comparison if your team has not chosen between inbox filtering and domain authentication. Read the Check Point review for deployment and response details.

Frequently asked questions

Which products name both Microsoft 365 and Google Workspace as supported mail platforms?

Check Point Harmony Email & Collaboration, Proofpoint Core Email Protection, and VIPRE Integrated Email Security name both platforms; compare their deployment routes before choosing.

Email Security Services - Check Point Software — “Deploy in minutes through API with flexible enforcement from monitor mode to inline prevention without changing MX records or disrupting Microsoft 365 or Google Workspace.” Retrieved 2026-10-23
AI Email Security | Proofpoint Core Email Protection — “Microsoft 365 and Google Workspace against phishing, BEC, and other evasive attacks with industry-leading email security.” Retrieved 2026-10-23
Integrated Email Security (IES) - VIPRE — “Microsoft 365 and Google Workspace. Trusted, adaptive, and proven.” Retrieved 2026-10-23

What limits do selected free DMARC plans publish?

DMARC Report Core covers one domain and 10,000 monthly messages; Suped Free covers one domain, 1,000 emails per month, and 14 days of retention; Sendmarc Free Basic Reporting lists 5,000 emails and 21 days of history for one domain.

Plans & Pricing - DMARC Report — “Core Get started Free 10,000 monthly messages 1 domain Subdomains 30 days data history Aggregate Reports.” Retrieved 2026-10-23
Pricing - Suped — “Free 1,000 emails per month For solo admins and hobbyists monitoring a single domain. Get started free 1 domain 14 days data retention.” Retrieved 2026-10-23
Sign Up For Sendmarc and Banish Spear Phishing Forever — “Free Basic Reporting DMARC visibility and insights to start your journey. Up to 5k Emails 1 Domain 21 Days Data History.” Retrieved 2026-10-23

What does DMARC Report charge for its Guard plan?

The published Guard plan is $25 per month or $275 per year for 250,000 monthly messages across five domains.

Plans & Pricing - DMARC Report — “Guard Pro-level assistance $25 $275 /mo /yr 250,000 monthly messages 5 domains.” Retrieved 2026-10-23

How does DMARC Digests help a domain owner?

DMARC Digests identifies sending sources and helps diagnose SPF and DKIM issues; its published plan is $14 per month per domain after a 14-day trial.

DMARC Monitoring to Protect Your Email Deliverability and Combat Spoofing and Phishing — “$14/month per domain. DMARC Digests makes it easy to identify email authentication issues causing DMARC failures and resolve problems that impact your deliverability.” Retrieved 2026-10-23
DMARC Monitoring to Protect Your Email Deliverability and Combat Spoofing and Phishing — “s that prevent your email from reaching the inbox and see who’s sending using your domains. Start a free 14-day trial then just $14/month per domain Leading brands trust DMARC Digests to help protect their deliverability. DMARC monitoring for humans. DMARC Digests makes it easy to identify email aut” Retrieved 2026-10-23

Which product automates triage for user-reported phishing?

Abnormal says AI Security Mailbox analyzes user reports, responds to the user, and remediates reported phishing without analyst involvement.

Email Security | Abnormal AI — “Automated triage of user-reported phishing. AI Security Mailbox analyzes the report, applies the same behavioral models, responds to the user, and remediates the threat without analyst involvement.” Retrieved 2026-10-23