Cybersecurity · head to head
BigID vs Microsoft Defender
BigID
Cybersecurity
Data discovery and classification across cloud, on-premise and unstructured stores
- From
- On request
- Rated
- -
Microsoft Defender
Cybersecurity
Always-on protection for you and your family's data and devices
- From
- $12/month
- Rated
- -
The short version
- Each has a real cost: BigID pricing scales with data sources and volume, so the cost rises exactly as the estate you need to scan grows, and the modules shown in a demo, including AI security posture and headless deployment, are frequently separate licences that appear only in the final quote.; Microsoft Defender defender Suite requires existing Microsoft 365 E3 or equivalent base licensing
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which BigID and Microsoft Defender actually diverge.
| Attribute | BigID | Microsoft Defender |
|---|---|---|
| Starting price | On request | $12/month |
| Pricing model | quote | subscription |
| Platforms | Web, API, Self-hosted | Web |
Identical on both: free tier (No), 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 BigID
- Structured and unstructured scanning
- Identity correlation
- Data security posture management
- Access intelligence
- Privacy request support
- Retention and minimisation
- AI data controls
- Policy and remediation workflow
Only in Microsoft Defender
Nothing recorded that BigID does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
BigID
- A bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migrationnot Microsoft Defender
- A privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s recordsnot Microsoft Defender
- A security team wanting to find sensitive data sitting in publicly readable object storage buckets before an attacker doesnot Microsoft Defender
- A company building retrieval augmented AI that must exclude regulated personal data from the index it feeds to a modelnot Microsoft Defender
Microsoft Defender
- Endpoint security and threat protectionnot BigID
- Identity and access securitynot BigID
- Email threat protectionnot BigID
- SaaS application security monitoringnot BigID
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
BigID
- Pricing scales with data sources and volume, so the cost rises exactly as the estate you need to scan grows, and the modules shown in a demo, including AI security posture and headless deployment, are frequently separate licences that appear only in the final quote.
- Scanning large unstructured estates is slow and computationally expensive, so most organisations sample rather than scan everything, which reintroduces uncertainty into the very question they bought the tool to settle.
- Classification accuracy on messy unstructured content requires tuning, and out of the box false positives on things like reference numbers create a large triage backlog that a small governance team cannot clear.
- It discovers and reports but does not remediate, so realising value requires a separate process and often separate tooling to actually delete, restrict or move the data it flags.
- It is built for large enterprises and both the price and the administrative overhead are disproportionate below a few thousand employees, where a lighter DSPM tool covers the security use case for far less.
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
Pricing, plan by plan
BigID
On request- BigID Platform$undefined/year
- Priced by number of data sources and data volume
- Discovery and classification core
- Optional DSPM, access intelligence and AI security modules licensed separately
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
Which should you pick?
Choose BigID if
- You need structured and unstructured scanning.
- You work on Web, API, Self-hosted.
- You also want identity correlation.
Choose Microsoft Defender if
Nothing in the data separates Microsoft Defender from BigID on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is BigID or Microsoft Defender better?
- Neither clearly leads. BigID starts at On request and Microsoft Defender at $12/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, BigID or Microsoft Defender?
- BigID starts at On request and Microsoft Defender at $12/month.
- Does BigID or Microsoft Defender run on more platforms?
- BigID runs on Web, API, Self-hosted. Microsoft Defender runs on Web.
- What is BigID best used for?
- BigID is most often used for a bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migration, a privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s records, a security team wanting to find sensitive data sitting in publicly readable object storage buckets before an attacker does, a company building retrieval augmented ai that must exclude regulated personal data from the index it feeds to a model. Of those, a bank that has to prove which of thirty year old file shares contain customer identifiers before a data centre migration and a privacy team that cannot fulfil deletion requests because nobody knows which unstructured stores hold a given customer’s records are not what Microsoft Defender is typically brought in for.
- What can BigID do that Microsoft Defender cannot?
- BigID covers Structured and unstructured scanning, Identity correlation, Data security posture management, Access intelligence.
Answered from the vendors’ own pages
BigID: What does BigID cost?
It is quoted by data source count and volume. Reported contracts run from roughly 15,000 to 175,000 US dollars a year, and add-on modules such as AI security posture are licensed on top.
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.
SourceBigID: Does it handle unstructured data?
Yes, and that is its main advantage. It classifies data in files and shares and correlates findings back to individuals, not just to data types.
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.
SourceBigID: Will it delete the data it finds?
Not by itself in most deployments. It identifies and routes findings; deletion and remediation happen through your own processes or connected systems.
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.
SourceBigID: Is it a privacy tool or a security tool?
Both are sold from the same discovery core. Buyers increasingly come from security wanting data security posture management rather than from legal wanting privacy.
Related pages
More on Microsoft Defender
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