Best Email Security Software · 2026
Mimecast Advanced Email Security vs 
Proofpoint Email Protection Mimecast Advanced Email Security vs Proofpoint Email Protection: on our data-weighted scoring, Proofpoint Email Protection edges ahead (8.3 vs 7.9/10). Mimecast Advanced Email Security starts at Custom quote and is best for mid-market to enterprise teams wanting email security bundled with archiving + continuity; Proofpoint Email Protection starts at Custom quote and is best for regulated enterprises wanting the most mature secure email gateway with deep threat intelligence. Choose Proofpoint Email Protection 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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Six criteria, each scored 0–10 on the same scale from real review data, public pricing and feature coverage. See our methodology →
| Criterion | Mimecast Advanced Email Security | Proofpoint Email Protection |
|---|---|---|
| Editorial | 7.9 | 8.3 |
| User reviews | 8.8 | 9.2 |
| Adoption | 6.5 | 7.3 |
| Affordability | 5.0 | 5.0 |
| Feature breadth | 6.0 | 6.0 |
| Ease of trial | 6.0 | 6.0 |
| Mimecast Advanced Email Security | Proofpoint Email Protection | |
|---|---|---|
| Starting price | Custom quote | Custom quote |
| Pricing model | quote | quote |
| Free trial / tier | 30 days | 30 days |
| Best for | Mid-market to enterprise teams wanting email security bundled with archiving + continuity | Regulated enterprises wanting the most mature secure email gateway with deep threat intelligence |
| Deployment | Cloud | Cloud |
| G2 rating | 4.4/5 (297) | 4.6/5 (548) |
| Capterra rating | — | — |
| Our score | 7.9 | 8.3 |
You need mid-market to enterprise teams wanting email security bundled with archiving + continuity.
You need regulated enterprises wanting the most mature secure email gateway with deep threat intelligence.
Proofpoint Email Protection bills on a quote model from Custom quote (30 days 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.
Proofpoint Email Protection ships 6 headline capabilities (Secure email gateway (MX-routed), NexusAI threat detection, TAP attachment + URL sandboxing, TRAP auto-pull remediation) 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.
Proofpoint Email Protection holds 4.6/5 (~548 G2 reviews); Mimecast Advanced Email Security holds 4.4/5 (~297 G2 reviews). On our data-weighted score, Proofpoint Email Protection edges ahead (8.3 vs 7.9/10). Pick Mimecast Advanced Email Security instead when mid-market to enterprise teams wanting email security bundled with archiving + continuity. See Proofpoint Email Protection alternatives or Mimecast Advanced Email Security alternatives.