# RealmGuard vs ZenGuard: 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). [ZenGuard](https://cybersectools.com/tools/zenguard) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [ZenGuard](https://cybersectools.com/companies/zenguard). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

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

### Use cases and capabilities

| | RealmGuard | ZenGuard |
|---|---|---|
| LLM Guardrails | Yes | Yes |
| LLM Security | Yes | Yes |
| Prompt Injection | Yes | Yes |
| AI Firewall | Yes | – |
| GenAI Security | Yes | Yes |
| Content Filtering | Yes | Yes |
| PII | Yes | Yes |
| AI Compliance | Yes | – |
| AI Governance | Yes | – |
| OWASP | Yes | – |
| Agentic AI Security | – | Yes |
| AI Pentesting | – | Yes |
| AI Observability | – | Yes |
| Runtime Security | – | Yes |

### Core features

**RealmGuard**

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

**ZenGuard**

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

### Integrations

**RealmGuard**

No integrations listed.

**ZenGuard**

1 integration 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.
- [ZenGuard](https://cybersectools.com/tools/zenguard) fits if you want a cloud product and you are a startup.

## RealmGuard vs ZenGuard FAQ

Common questions when comparing RealmGuard vs ZenGuard for LLM guardrails.

### What is the difference between RealmGuard and ZenGuard?

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

**ZenGuard**: Runtime protection and security testing platform for LLM-based AI agents. Built by ZenGuard.

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

### Who makes RealmGuard and ZenGuard?

**RealmGuard** is made by Realm Labs. **ZenGuard** is made by ZenGuard. 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 ZenGuard?

In part. RealmGuard and ZenGuard are not in the same category on CybersecTools. Both cover LLM Security, LLM Guardrails, Prompt Injection. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [RealmGuard vs Airia AI Platform Guardrails](https://cybersectools.com/compare/airia-ai-platform-guardrails-vs-realm-labs-platform)
- [RealmGuard vs Senthex AI Firewall](https://cybersectools.com/compare/realm-labs-platform-vs-senthex-ai-firewall)
- [RealmGuard vs First Recon AI Firewall](https://cybersectools.com/compare/first-recon-ai-firewall-vs-realm-labs-platform)
- [ZenGuard vs Airia AI Platform Guardrails](https://cybersectools.com/compare/airia-ai-platform-guardrails-vs-zenguard)
- [ZenGuard vs Senthex AI Firewall](https://cybersectools.com/compare/senthex-ai-firewall-vs-zenguard)
- [ZenGuard vs First Recon AI Firewall](https://cybersectools.com/compare/first-recon-ai-firewall-vs-zenguard)

## Alternatives to each

- [See all RealmGuard alternatives](https://cybersectools.com/alternatives/realm-labs-platform)
- [See all ZenGuard alternatives](https://cybersectools.com/alternatives/zenguard)

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

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More on RealmGuard and ZenGuard: 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