# Microsoft Defender for Identity vs Obsidian Security Browser Extension: side-by-side comparison (2026)

[Microsoft Defender for Identity](https://cybersectools.com/tools/microsoft-defender-for-identity) is a commercial [identity threat detection and response](https://cybersectools.com/categories/itdr) solution by [Microsoft](https://cybersectools.com/companies/microsoft). [Obsidian Security Browser Extension](https://cybersectools.com/tools/obsidian-security-browser-extension) is a commercial [identity threat detection and response](https://cybersectools.com/categories/itdr) solution by [Obsidian Security](https://cybersectools.com/companies/obsidian-security). Features, integrations, deployment and the company behind each one, side by side.

## Our take

What our shortlists say about the one we picked.

### [Microsoft Defender for Identity](https://cybersectools.com/tools/microsoft-defender-for-identity)

Best for: Microsoft shops with on-premises Active Directory

It leads this list because most companies still run on-premises Active Directory, and this product watches it from the inside while feeding the same Defender incidents your analysts already work. If you are a Microsoft shop, it is often the shortest path to identity detection. If your endpoint and SOC stack is not Microsoft, weigh how much of that value carries over.

From [Best ITDR Solutions for Business](https://cybersectools.com/shortlists/best-itdr-solutions), Fall 2026.

Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about).

Need the answer fast? [Best ITDR Solutions for Business](https://cybersectools.com/shortlists/best-itdr-solutions) picks Microsoft Defender for Identity, CrowdStrike Falcon Next-Gen Identity Security, SentinelOne Singularity Identity Security and 4 more.

## Side-by-side comparison

| | Microsoft Defender for Identity | Obsidian Security Browser Extension |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Identity Threat Detection and Response | Identity Threat Detection and Response |
| Verified | No | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | Microsoft | Obsidian Security |
| Headquarters | – | – |

### Use cases and capabilities

| | Microsoft Defender for Identity | Obsidian Security Browser Extension |
|---|---|---|
| Active Directory | Yes | – |
| Attack Detection | Yes | – |
| Microsoft | Yes | – |
| Browser Security | – | Yes |

### Core features

**Microsoft Defender for Identity**

8 features listed. Sign in on the page to see them.

**Obsidian Security Browser Extension**

4 features listed. Sign in on the page to see them.

### Integrations

**Microsoft Defender for Identity**

3 integrations listed. Sign in on the page to see them.

**Obsidian Security Browser Extension**

No integrations listed.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Microsoft Defender for Identity](https://cybersectools.com/tools/microsoft-defender-for-identity) fits if you need both cloud and on-premises options and you are a small business.
- [Obsidian Security Browser Extension](https://cybersectools.com/tools/obsidian-security-browser-extension) fits if you want a cloud product.

## Microsoft Defender for Identity vs Obsidian Security Browser Extension FAQ

Common questions when comparing Microsoft Defender for Identity vs Obsidian Security Browser Extension for identity threat detection and response.

### What is the difference between Microsoft Defender for Identity and Obsidian Security Browser Extension?

**Microsoft Defender for Identity**: Identity threat detection and response solution for Active Directory, built by Microsoft.

**Obsidian Security Browser Extension**: Browser extension for identity threat protection, anti-phishing & shadow IT detection, built by Obsidian Security.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Microsoft Defender for Identity and Obsidian Security Browser Extension?

**Microsoft Defender for Identity** is made by Microsoft. **Obsidian Security Browser Extension** is made by Obsidian Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Microsoft Defender for Identity a good alternative to Obsidian Security Browser Extension?

Often, yes. Microsoft Defender for Identity and Obsidian Security Browser Extension are both Identity Threat Detection and Response products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Microsoft Defender for Identity vs Netwrix Identity Threat Detection & Response](https://cybersectools.com/compare/microsoft-defender-for-identity-vs-netwrix-identity-threat-detection-and-response)
- [Microsoft Defender for Identity vs Semperis AI-Powered Identity Security](https://cybersectools.com/compare/microsoft-defender-for-identity-vs-semperis-ai-powered-identity-security)
- [Microsoft Defender for Identity vs SentinelOne Singularity Identity Security](https://cybersectools.com/compare/microsoft-defender-for-identity-vs-sentinelone-singularity-identity-security)
- [Obsidian Security Browser Extension vs Netwrix Identity Threat Detection & Response](https://cybersectools.com/compare/netwrix-identity-threat-detection-and-response-vs-obsidian-security-browser-extension)
- [Obsidian Security Browser Extension vs Semperis AI-Powered Identity Security](https://cybersectools.com/compare/obsidian-security-browser-extension-vs-semperis-ai-powered-identity-security)
- [Obsidian Security Browser Extension vs SentinelOne Singularity Identity Security](https://cybersectools.com/compare/obsidian-security-browser-extension-vs-sentinelone-singularity-identity-security)

## Alternatives to each

- [See all Microsoft Defender for Identity alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-identity)
- [See all Obsidian Security Browser Extension alternatives](https://cybersectools.com/alternatives/obsidian-security-browser-extension)

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Source: https://cybersectools.com/compare/microsoft-defender-for-identity-vs-obsidian-security-browser-extension

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/microsoft-defender-for-identity.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Microsoft Defender for Identity and Obsidian Security Browser Extension: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md