# LLM Guard vs Promptfoo Guardrails: side-by-side comparison (2026)

[LLM Guard](https://cybersectools.com/tools/llm-guard) is a free [LLM guardrails](https://cybersectools.com/categories/llm-guardrails) solution. [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) is a commercial [LLM guardrails](https://cybersectools.com/categories/llm-guardrails) solution by [Promptfoo](https://cybersectools.com/companies/promptfoo). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | LLM Guard | Promptfoo Guardrails |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | LLM Guardrails | LLM Guardrails |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 2,043 | – |
| Last commit | Sep 2025 | – |
| Company | – | Promptfoo |
| Headquarters | – | – |

### Use cases and capabilities

| | LLM Guard | Promptfoo Guardrails |
|---|---|---|
| Open Source | Yes | – |
| Generative AI | Yes | Yes |
| Prompt Injection | Yes | Yes |
| LLM Security | Yes | Yes |
| LLM Guardrails | Yes | Yes |
| AI Firewall | – | Yes |
| GenAI Security | – | Yes |
| Red Team | – | Yes |
| Continuous Testing | – | Yes |
| Adversarial ML | – | Yes |
| AI Governance | – | Yes |

### Core features

**LLM Guard**

No features listed.

**Promptfoo Guardrails**

6 features 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.

- [LLM Guard](https://cybersectools.com/tools/llm-guard) fits if you need to run it on your own servers, you need a free product and you want an open-source product.
- [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) fits if you need both cloud and on-premises options.

## LLM Guard vs Promptfoo Guardrails FAQ

Common questions when comparing LLM Guard vs Promptfoo Guardrails for LLM guardrails.

### What is the difference between LLM Guard and Promptfoo Guardrails?

**LLM Guard**: LLM Guard is a security toolkit that enhances the safety and security of interactions with Large Language Models (LLMs) by providing features like sanitization, harmful language detection, data leakage prevention, and resistance against prompt injection attacks.

**Promptfoo Guardrails**: Adaptive LLM guardrails that self-improve via red team feedback loops. Built by Promptfoo.

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

### Who makes LLM Guard and Promptfoo Guardrails?

**LLM Guard** is open-source with 2,043 GitHub stars. **Promptfoo Guardrails** is made by Promptfoo. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is LLM Guard a good alternative to Promptfoo Guardrails?

Often, yes. LLM Guard and Promptfoo Guardrails are both LLM Guardrails products, and both cover LLM Guardrails, LLM Security, Prompt Injection. Key differences: LLM Guard is Free while Promptfoo Guardrails is Commercial, LLM Guard is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [LLM Guard vs Confident Security](https://cybersectools.com/compare/confident-security-vs-llm-guard)
- [LLM Guard vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/llm-guard-vs-pointguard-ai-intelligent-guardrails)
- [LLM Guard vs RealmGuard](https://cybersectools.com/compare/llm-guard-vs-realm-labs-platform)
- [Promptfoo Guardrails vs Confident Security](https://cybersectools.com/compare/confident-security-vs-promptfoo-guardrails)
- [Promptfoo Guardrails vs PointGuard AI Intelligent Guardrails](https://cybersectools.com/compare/pointguard-ai-intelligent-guardrails-vs-promptfoo-guardrails)
- [Promptfoo Guardrails vs RealmGuard](https://cybersectools.com/compare/promptfoo-guardrails-vs-realm-labs-platform)

## Alternatives to each

- [See all LLM Guard alternatives](https://cybersectools.com/alternatives/llm-guard)
- [See all Promptfoo Guardrails alternatives](https://cybersectools.com/alternatives/promptfoo-guardrails)

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Source: https://cybersectools.com/compare/llm-guard-vs-promptfoo-guardrails

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

More on LLM Guard and Promptfoo Guardrails: 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