Cybersecurity · head to head
Microsoft Defender vs ThetaRay
Microsoft Defender
Cybersecurity
Always-on protection for you and your family's data and devices
- From
- $12/month
- Rated
- -
ThetaRay
Cybersecurity
Unsupervised AI transaction monitoring for cross-border and correspondent banking
- From
- On request
- Rated
- -
The short version
- Each has a real cost: Microsoft Defender defender Suite requires existing Microsoft 365 E3 or equivalent base licensing; ThetaRay unsupervised models are harder to justify to an examiner than explicit rules, and some regulators still expect documented threshold logic, which can force you to run both systems.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Microsoft Defender and ThetaRay actually diverge.
| Attribute | Microsoft Defender | ThetaRay |
|---|---|---|
| Starting price | $12/month | On request |
| Pricing model | subscription | quote |
Identical on both: free tier (No), platforms (Web), user rating (Not yet rated), category (Cybersecurity).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Microsoft Defender
Nothing recorded that ThetaRay does not also cover.
Only in ThetaRay
- Unsupervised detection
- Cross-border focus
- Sanctions screening
- Alert triage
- Customer risk scoring
- Cloud native
What people use each for
The jobs each tool is most often brought in to do.
Microsoft Defender
- Endpoint security and threat protectionnot ThetaRay
- Identity and access securitynot ThetaRay
- Email threat protectionnot ThetaRay
- SaaS application security monitoringnot ThetaRay
ThetaRay
- A correspondent bank that cannot see the ultimate originator and needs behavioural signals rather than counterparty listsnot Microsoft Defender
- A cross-border payments fintech whose rules engine produces more alerts than its compliance team can clearnot Microsoft Defender
- A bank under a regulatory consent order needing demonstrable improvement in detection within a fixed periodnot Microsoft Defender
- A payment institution entering a high-risk corridor where existing thresholds were calibrated on domestic trafficnot Microsoft Defender
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Microsoft Defender
- Defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
- Some Defender products use pay-as-you-go pricing with variable costs
- Prices vary based on Microsoft agreements, requiring sales contact for custom quotes
ThetaRay
- Unsupervised models are harder to justify to an examiner than explicit rules, and some regulators still expect documented threshold logic, which can force you to run both systems.
- The alert reduction claim depends heavily on your data, so a parallel run is essential and adds months and cost before you can decommission the incumbent.
- Coverage is strongest in cross-border and correspondent flows; institutions whose risk is domestic retail fraud will find the fit weaker than a general-purpose monitoring platform.
- It is a smaller vendor than the incumbents, so integration connectors into legacy core banking systems are often bespoke work rather than a supported adapter.
- Model retraining and tuning are vendor-led, which means changing detection behaviour is a support conversation rather than something your own analysts can do that afternoon.
Pricing, plan by plan
Microsoft Defender
$12/month- Microsoft Defender Suite$12/month
- Endpoint protection
- Identity threat detection
- Email security
- Microsoft 365 E5 with Defender$60/month
- Includes Defender Suite
- Microsoft Teams included
- Comprehensive security and compliance
- Microsoft Defender Vulnerability Management Add-on$2/month
- Vulnerability scanning and management
- One-month free trial available
- Annual commitment required
ThetaRay
On request- ThetaRay Sonar$undefined/year
- Priced by monitored transaction volume and number of monitored entities
- SaaS on Azure with regional data residency options
- Parallel run and model tuning included in onboarding
Which should you pick?
Choose Microsoft Defender if
Nothing in the data separates Microsoft Defender from ThetaRay on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is Microsoft Defender or ThetaRay better?
- Neither clearly leads. Microsoft Defender starts at $12/month and ThetaRay at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Microsoft Defender or ThetaRay?
- Microsoft Defender starts at $12/month and ThetaRay at On request.
- Does Microsoft Defender or ThetaRay run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
- What is Microsoft Defender best used for?
- Microsoft Defender is most often used for endpoint security and threat protection, identity and access security, email threat protection, saas application security monitoring. Of those, endpoint security and threat protection and identity and access security are not what ThetaRay is typically brought in for.
- What can Microsoft Defender do that ThetaRay cannot?
- ThetaRay covers Unsupervised detection, Cross-border focus, Sanctions screening, Alert triage.
Answered from the vendors’ own pages
Microsoft Defender: How much does Microsoft Defender Suite cost?
Microsoft Defender Suite costs $12/user/month (paid yearly), but requires existing Microsoft 365 E3 or equivalent base licensing. It includes endpoint protection, identity threat detection, email security, and SaaS application monitoring.
SourceThetaRay: Does it replace a rules engine entirely?
Rarely on day one. Most institutions run it alongside existing rules during a parallel period, and some keep specific regulator-mandated rules permanently.
Microsoft Defender: What add-ons are available for Microsoft Defender?
Microsoft Defender Vulnerability Management Add-on costs $2/user/month with annual commitment and includes a one-month free trial. Additional pay-as-you-go products include External Attack Surface Management, Cloud Security Posture Management, and Sentinel.
SourceThetaRay: Where is the data processed?
SaaS runs on Microsoft Azure with regional deployment options, which is the mechanism for meeting data residency conditions in regulated markets.
Microsoft Defender: Is Defender included in Microsoft 365 E5?
Yes, Microsoft Defender Suite is included in Microsoft 365 E5 at $60/user/month (paid yearly with Teams). Prices may vary based on Microsoft agreements, requiring contact with Sales for customized quotes.
SourceThetaRay: Is sanctions screening included?
Screening is available on the same platform but licensed as part of the commercial package rather than bundled by default. Confirm it is in your quote.
Related pages
More on Microsoft Defender
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