# Promptfoo Guardrails vs Trustwise Harmony AI: side-by-side comparison (2026)

[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). [Trustwise Harmony AI](https://cybersectools.com/tools/trustwise-harmony-ai) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Trustwise](https://cybersectools.com/companies/trustwise). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Promptfoo Guardrails | Trustwise Harmony AI |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | LLM Guardrails | Agentic AI Security |
| Verified | No | No |
| Deployment type | Hybrid | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Enterprise |
| Company | Promptfoo | Trustwise |
| Headquarters | – | – |

### Use cases and capabilities

| | Promptfoo Guardrails | Trustwise Harmony AI |
|---|---|---|
| LLM Guardrails | Yes | – |
| LLM Security | Yes | – |
| AI Firewall | Yes | – |
| Prompt Injection | Yes | – |
| GenAI Security | Yes | – |
| Red Team | Yes | – |
| Generative AI | Yes | Yes |
| Continuous Testing | Yes | – |
| Adversarial ML | Yes | – |
| AI Governance | Yes | – |
| Policy | – | Yes |
| MLSecOps | – | Yes |

### Core features

**Promptfoo Guardrails**

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

**Trustwise Harmony AI**

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

### Integrations

**Promptfoo Guardrails**

No integrations listed.

**Trustwise Harmony AI**

13 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.

- [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) fits if you are a startup or a small business or a mid-market company.

## Promptfoo Guardrails vs Trustwise Harmony AI FAQ

Common questions when comparing Promptfoo Guardrails vs Trustwise Harmony AI for LLM guardrails.

### What is the difference between Promptfoo Guardrails and Trustwise Harmony AI?

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

**Trustwise Harmony AI**: Runtime AI trust & security platform for governing agentic AI systems. Built by Trustwise.

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

### Who makes Promptfoo Guardrails and Trustwise Harmony AI?

**Promptfoo Guardrails** is made by Promptfoo. **Trustwise Harmony AI** is made by Trustwise. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Promptfoo Guardrails a good alternative to Trustwise Harmony AI?

In part. Promptfoo Guardrails and Trustwise Harmony AI are not in the same category on CybersecTools. Both cover Generative AI. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Promptfoo Guardrails vs RealmGuard](https://cybersectools.com/compare/promptfoo-guardrails-vs-realm-labs-platform)
- [Promptfoo Guardrails vs Confident Security](https://cybersectools.com/compare/confident-security-vs-promptfoo-guardrails)
- [Promptfoo Guardrails vs First Recon AI Firewall](https://cybersectools.com/compare/first-recon-ai-firewall-vs-promptfoo-guardrails)
- [Trustwise Harmony AI vs RealmGuard](https://cybersectools.com/compare/realm-labs-platform-vs-trustwise-harmony-ai)
- [Trustwise Harmony AI vs Confident Security](https://cybersectools.com/compare/confident-security-vs-trustwise-harmony-ai)
- [Trustwise Harmony AI vs First Recon AI Firewall](https://cybersectools.com/compare/first-recon-ai-firewall-vs-trustwise-harmony-ai)

## Alternatives to each

- [See all Promptfoo Guardrails alternatives](https://cybersectools.com/alternatives/promptfoo-guardrails)
- [See all Trustwise Harmony AI alternatives](https://cybersectools.com/alternatives/trustwise-harmony-ai)

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Source: https://cybersectools.com/compare/promptfoo-guardrails-vs-trustwise-harmony-ai

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

More on Promptfoo Guardrails and Trustwise Harmony AI: 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