# RealmGuard vs Shadow Defend: side-by-side comparison (2026)

[RealmGuard](https://cybersectools.com/tools/realm-labs-platform) is a commercial [LLM guardrails](https://cybersectools.com/categories/llm-guardrails) solution by [Realm Labs](https://cybersectools.com/companies/realm-labs). [Shadow Defend](https://cybersectools.com/tools/shadowdefend) is a commercial [AI governance](https://cybersectools.com/categories/ai-governance) solution by [Shadow Defend](https://cybersectools.com/companies/shadow-defend). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | RealmGuard | Shadow Defend |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | LLM Guardrails | AI Governance |
| Verified | No | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Realm Labs | Shadow Defend |
| Headquarters | – | – |

### Use cases and capabilities

| | RealmGuard | Shadow Defend |
|---|---|---|
| LLM Guardrails | Yes | – |
| LLM Security | Yes | Yes |
| Prompt Injection | Yes | – |
| AI Firewall | Yes | – |
| GenAI Security | Yes | – |
| Content Filtering | Yes | – |
| PII | Yes | Yes |
| AI Compliance | Yes | Yes |
| AI Governance | Yes | Yes |
| OWASP | Yes | Yes |
| Shadow AI | – | Yes |
| AI DLP | – | Yes |
| Browser Security | – | Yes |
| Sensitive Data | – | Yes |

### Core features

**RealmGuard**

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

**Shadow Defend**

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

### Integrations

**RealmGuard**

No integrations listed.

**Shadow Defend**

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

## Which one fits you

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

- [RealmGuard](https://cybersectools.com/tools/realm-labs-platform) fits if you need both cloud and on-premises options.
- [Shadow Defend](https://cybersectools.com/tools/shadowdefend) fits if you want a cloud product and you are a startup.

## RealmGuard vs Shadow Defend FAQ

Common questions when comparing RealmGuard vs Shadow Defend for LLM guardrails.

### What is the difference between RealmGuard and Shadow Defend?

**RealmGuard**: AI guardrail platform detecting harmful outputs, prompt injections & policy violations. Built by Realm Labs.

**Shadow Defend**: Browser extension for AI governance: discovers, monitors & controls AI tool use. Built by Shadow Defend.

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

### Who makes RealmGuard and Shadow Defend?

**RealmGuard** is made by Realm Labs. **Shadow Defend** is made by Shadow Defend founded in 2026-01-01T00:00:00.000Z. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is RealmGuard a good alternative to Shadow Defend?

In part. RealmGuard and Shadow Defend are not in the same category on CybersecTools. Both cover AI Governance, LLM Security, PII. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [RealmGuard vs Confident Security](https://cybersectools.com/compare/confident-security-vs-realm-labs-platform)
- [RealmGuard vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/pointguard-ai-intelligent-guardrails-vs-realm-labs-platform)
- [RealmGuard vs AI Security Gateway™](https://cybersectools.com/compare/ai-security-gatewaytm-vs-realm-labs-platform)
- [Shadow Defend vs Confident Security](https://cybersectools.com/compare/confident-security-vs-shadowdefend)
- [Shadow Defend vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/pointguard-ai-intelligent-guardrails-vs-shadowdefend)
- [Shadow Defend vs AI Security Gateway™](https://cybersectools.com/compare/ai-security-gatewaytm-vs-shadowdefend)

## Alternatives to each

- [See all RealmGuard alternatives](https://cybersectools.com/alternatives/realm-labs-platform)
- [See all Shadow Defend alternatives](https://cybersectools.com/alternatives/shadowdefend)

---

Source: https://cybersectools.com/compare/realm-labs-platform-vs-shadowdefend

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

More on RealmGuard and Shadow Defend: 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