Mimecast Advanced Email Security Alternatives (2026)

Mimecast
Mimecast Advanced Email Security
7.9/10 MSP Compared score 4.4★ · 297 reviews G2
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Starting price
Custom quote
Free trial
30 days
Deployment
Cloud
Best for
Mid-market to enterprise teams wanting email security bundled with archiving + continuity

Our verdict

The top alternatives to Mimecast Advanced Email Security are IRONSCALES, Proofpoint Email Protection, Check Point Harmony Email (Avanan). IRONSCALES is the closest like-for-like option (4.7/5 (~45 G2 reviews), from $3.11/mailbox/mo). People typically switch from Mimecast Advanced Email Security over pricing model, complexity, or a missing capability — the table compares each alternative on exactly those axes.

  1. IRONSCALES

    ★ Editor's Choice
    8.4/10 4.7★ · 45 reviewsper G2

    Best for MSPs and mid-market teams wanting human + AI phishing defense with public self-serve pricing.

    • API-based deployment (no MX change)
    • Human + AI crowdsourced detection
    • Automated phishing remediation
    Free trial Free version
  2. Proofpoint Email Protection

    8.3/10 4.6★ · 548 reviewsper G2

    Best for Regulated enterprises wanting the most mature secure email gateway with deep threat intelligence.

    • Secure email gateway (MX-routed)
    • NexusAI threat detection
    • TAP attachment + URL sandboxing
    Free trial Free version
  3. Check Point Harmony Email (Avanan)

    8.1/10 4.6★ · 511 reviewsper G2

    Best for Microsoft 365 / Google Workspace shops wanting API-based protection with no MX change.

    • Inline API deployment (no MX change)
    • Post-delivery + internal email scanning
    • Anti-phishing + malware + BEC
    Free trial Free version
  4. Abnormal AI

    8.0/10 4.8★ · 65 reviewsper G2

    Best for Enterprises prioritizing best-in-class behavioral AI detection of BEC and account takeover.

    • API-based behavioral AI
    • No-tuning anomaly detection
    • BEC + impersonation protection
    Free trial Free version
  5. Barracuda Email Protection

    7.8/10 4.4★ · 220 reviewsper G2

    Best for SMBs and MSPs wanting broad, no-drama email protection plus backup from one familiar vendor.

    • Gateway + API-based protection
    • Impersonation + phishing protection
    • Automated incident response
    Free trial Free version

More alternatives detail

Teams usually move off Mimecast Advanced Email Security for one of three reasons: pricing model, complexity, or a missing capability. The closest like-for-like options on the data we track are IRONSCALES, Proofpoint Email Protection, Check Point Harmony Email (Avanan).

Frequently asked questions

What is the best alternative to Mimecast Advanced Email Security?
IRONSCALES is the top-rated alternative in our data-weighted ranking (from $3.11/mailbox/mo).
Why do people switch from Mimecast Advanced Email Security?
Usually pricing model, complexity, or a missing capability. The table compares each alternative on exactly those axes.
Data as of June 1, 2026. Sources: mimecast.com, g2.com. Figures are pulled from public vendor and security data and refreshed automatically.