# RealmGuard vs Zscaler AI Runtime Protection: 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). [Zscaler AI Runtime Protection](https://cybersectools.com/tools/zscaler-ai-runtime-protection) is a commercial [LLM guardrails](https://cybersectools.com/categories/llm-guardrails) solution by [SPLX](https://cybersectools.com/companies/splx). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | RealmGuard | Zscaler AI Runtime Protection |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | LLM Guardrails | LLM Guardrails |
| Verified | No | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | Realm Labs | SPLX |
| Headquarters | – | – |

### Use cases and capabilities

| | RealmGuard | Zscaler AI Runtime Protection |
|---|---|---|
| LLM Guardrails | Yes | – |
| LLM Security | Yes | – |
| Prompt Injection | Yes | – |
| AI Firewall | Yes | – |
| GenAI Security | Yes | – |
| Content Filtering | Yes | – |
| PII | Yes | – |
| AI Compliance | Yes | – |
| AI Governance | Yes | – |
| OWASP | Yes | – |
| Anomaly Detection | – | Yes |

### Core features

**RealmGuard**

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

**Zscaler AI Runtime Protection**

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

### Integrations

**RealmGuard**

No integrations listed.

**Zscaler AI Runtime Protection**

3 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 and you are a small business.
- [Zscaler AI Runtime Protection](https://cybersectools.com/tools/zscaler-ai-runtime-protection) fits if you want a cloud product.

## RealmGuard vs Zscaler AI Runtime Protection FAQ

Common questions when comparing RealmGuard vs Zscaler AI Runtime Protection for LLM guardrails.

### What is the difference between RealmGuard and Zscaler AI Runtime Protection?

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

**Zscaler AI Runtime Protection**: Runtime protection for AI systems detecting prompt attacks & data leaks. Built by SPLX.

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

### Who makes RealmGuard and Zscaler AI Runtime Protection?

**RealmGuard** is made by Realm Labs. **Zscaler AI Runtime Protection** is made by SPLX. 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 Zscaler AI Runtime Protection?

Often, yes. RealmGuard and Zscaler AI Runtime Protection are both LLM Guardrails products. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [RealmGuard vs Senthex AI Firewall](https://cybersectools.com/compare/realm-labs-platform-vs-senthex-ai-firewall)
- [RealmGuard vs Promptfoo Guardrails](https://cybersectools.com/compare/promptfoo-guardrails-vs-realm-labs-platform)
- [RealmGuard vs Confident Security](https://cybersectools.com/compare/confident-security-vs-realm-labs-platform)
- [Zscaler AI Runtime Protection vs Senthex AI Firewall](https://cybersectools.com/compare/senthex-ai-firewall-vs-zscaler-ai-runtime-protection)
- [Zscaler AI Runtime Protection vs Promptfoo Guardrails](https://cybersectools.com/compare/promptfoo-guardrails-vs-zscaler-ai-runtime-protection)
- [Zscaler AI Runtime Protection vs Confident Security](https://cybersectools.com/compare/confident-security-vs-zscaler-ai-runtime-protection)

## Alternatives to each

- [See all RealmGuard alternatives](https://cybersectools.com/alternatives/realm-labs-platform)
- [See all Zscaler AI Runtime Protection alternatives](https://cybersectools.com/alternatives/zscaler-ai-runtime-protection)

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Source: https://cybersectools.com/compare/realm-labs-platform-vs-zscaler-ai-runtime-protection

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 Zscaler AI Runtime Protection: 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