Abnormal Security vs Microsoft Defender for Office 365
Email Security pricing comparison · 2026
Abnormal Security uses custom pricing, while Microsoft Defender for Office 365 ranges from $2–$5/user/month. These products use different pricing models ( vs Per-seat subscription), so a direct price comparison isn't meaningful — costs depend on usage volume and mix.
Abnormal Security
Abnormal Security does not publish public pricing.
verified 13d ago
$250
$41K
Microsoft Defender for Office 365
Microsoft Defender for Office 365 (formerly Office 365 Advanced Threat Protection) is an i
verified 8w ago
$250
$41K
Verdict · Vendr median · year 1
Microsoft
saves
$41K
vs
Abnormal
· 25 seats
Cheapest
$250
Spread
99%
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Custom pricing
Custom
all tiers are quote-only
Plan 2
$1.5K/yr
year 1 license · $5/seat
What buyers actually pay
median, annual
Vendr deal-flow data. The real benchmark, not list price.
Median annual
$41K/yr
Vendr · n=42
avg 23% negotiated
↓ Lowest median
Median annual
$250/yr
Vendr · n=42
REF · 01
Sources & confidence
Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.
Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources
5 sourced facts
4 contract · Vendr median
Last verified
1w ago
Confidence
Limited confidence
Sources
2 sourced facts
Vendr median · 1 review platform
Last verified
1mo ago
Confidence
High confidence
REF · 02
Plans at a glance
Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.
Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 05
What users say
Aggregated, with sample sizes. We use whichever review platform has data.
User reviews
TrustRadius · Trustpilot · G2
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
License cost is computed from publicly listed plans (real math, list price × seats).
Median annual cost is from Vendr's deal flow when available — see source badges.
Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
VS
Abnormal Security and Microsoft Defender for Office 365 both operate in the email security category. This page compares their list pricing.
Plan-by-Plan Pricing
| Plan | Abnormal Security | Microsoft Defender for Office 365 |
|---|---|---|
| Inbound Email Security | Custom | $2 /month |
| Account Takeover Protection | Custom | $5 /month |
| AI Security Mailbox Automation | Custom | — |
| Email Productivity | Custom | — |
Market Intelligence
Abnormal Security
- Median annual cost
- $41,360
- Average negotiated discount
- 23%
- Based on
- 42 deals
Microsoft Defender for Office 365
- Median annual cost
- $250
- Based on
- 42 deals