Abnormal AI
8.0/10
MSP Compared score
- Starting price
- Custom quote
- Reviews
- 4.8/5 (~65 G2 reviews)
- Free trial
- —
- Deployment
- Cloud
- Best for
- Enterprises prioritizing best-in-class behavioral AI detection of BEC and account takeover
Best Email Security Software · 2026
Abnormal AI vs 
Mimecast Advanced Email Security Abnormal AI vs Mimecast Advanced Email Security: on our data-weighted scoring, Abnormal AI edges ahead (8.0 vs 7.9/10). Abnormal AI starts at Custom quote and is best for enterprises prioritizing best-in-class behavioral AI detection of BEC and account takeover; Mimecast Advanced Email Security starts at Custom quote and is best for mid-market to enterprise teams wanting email security bundled with archiving + continuity. Choose Abnormal AI for the stronger overall track record; consider Mimecast Advanced Email Security if its pricing model or fit matches your environment better. Side-by-side table below.
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Mimecast Advanced Email Security
7.9/10
MSP Compared score
- Starting price
- Custom quote
- Reviews
- 4.4/5 (~297 G2 reviews)
- Free trial
- 30 days
- Deployment
- Cloud
- Best for
- Mid-market to enterprise teams wanting email security bundled with archiving + continuity
Strengths at a glance
Six criteria, each scored 0–10 on the same scale from real review data, public pricing and feature coverage. See our methodology →
| Criterion | Abnormal AI | Mimecast Advanced Email Security |
|---|---|---|
| Editorial | 8.0 | 7.9 |
| User reviews | 9.6 | 8.8 |
| Adoption | 4.8 | 6.5 |
| Affordability | 5.0 | 5.0 |
| Feature breadth | 6.0 | 6.0 |
| Ease of trial | 3.0 | 6.0 |
Abnormal AI vs Mimecast Advanced Email Security: head-to-head
| Abnormal AI | Mimecast Advanced Email Security | |
|---|---|---|
| Starting price | Custom quote | Custom quote |
| Pricing model | quote | quote |
| Free trial / tier | — | 30 days |
| Best for | Enterprises prioritizing best-in-class behavioral AI detection of BEC and account takeover | Mid-market to enterprise teams wanting email security bundled with archiving + continuity |
| Deployment | Cloud | Cloud |
| G2 rating | 4.8/5 (65) | 4.4/5 (297) |
| Capterra rating | — | — |
| Our score | 8.0 | 7.9 |
Choose Abnormal AI if…
You need enterprises prioritizing best-in-class behavioral ai detection of bec and account takeover.
✓ Pros
- Top-rated detection accuracy
- Behavioral baseline needs no manual tuning
- Fast API deployment
✕ Cons
- No free tier; enterprise minimums
- Pricing not published (quote-only)
- Premium positioning
Choose Mimecast Advanced Email Security if…
You need mid-market to enterprise teams wanting email security bundled with archiving + continuity.
✓ Pros
- Strong archiving + continuity bundle
- Mature SEG with compliance depth
- Good mid-market fit
✕ Cons
- Quote-only pricing
- Reporting trails Proofpoint
- Gateway model requires MX change
In depth
Pricing: Abnormal AI vs Mimecast Advanced Email Security
Abnormal AI bills on a quote model from Custom quote (no trial), while Mimecast Advanced Email Security uses a quote model from Custom quote (30 days trial). Because the models differ, the cheaper option flips depending on your fleet size — model both at your seat/endpoint count.
Features & deployment
Abnormal AI ships 6 headline capabilities (API-based behavioral AI, No-tuning anomaly detection, BEC + impersonation protection, Account takeover detection) and deploys Cloud. Mimecast Advanced Email Security ships 6 (Secure email gateway, CyberGraph AI threat intel, Built-in email archiving (10+ yr), Mailbox continuity), deploying Cloud.
Ratings & verdict
Abnormal AI holds 4.8/5 (~65 G2 reviews); Mimecast Advanced Email Security holds 4.4/5 (~297 G2 reviews). On our data-weighted score, Abnormal AI edges ahead (8.0 vs 7.9/10). Pick Mimecast Advanced Email Security instead when mid-market to enterprise teams wanting email security bundled with archiving + continuity. See Abnormal AI alternatives or Mimecast Advanced Email Security alternatives.
Frequently asked questions
- Abnormal AI vs Mimecast Advanced Email Security: which is better?
- Abnormal AI vs Mimecast Advanced Email Security: on our data-weighted scoring, Abnormal AI edges ahead (8.0 vs 7.9/10). Abnormal AI starts at Custom quote and is best for enterprises prioritizing best-in-class behavioral AI detection of BEC and account takeover; Mimecast Advanced Email Security starts at Custom quote and is best for mid-market to enterprise teams wanting email security bundled with archiving + continuity.
- Is Abnormal AI cheaper than Mimecast Advanced Email Security?
- Abnormal AI starts at Custom quote and Mimecast Advanced Email Security starts at Custom quote (see the pricing rows for models and limits).
Data as of September 17, 2026. Sources: abnormal.ai, mimecast.com. Figures are pulled from public vendor and security data and refreshed automatically.