# Ammune API Discovery vs Promptfoo Guardrails: side-by-side comparison (2026)

[Ammune API Discovery](https://cybersectools.com/tools/ammune-api-discovery) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Ammune.ai](https://cybersectools.com/companies/ammuneai). [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.

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## Side-by-side comparison

| | Ammune API Discovery | Promptfoo Guardrails |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | API Security | LLM Guardrails |
| Verified | No | No |
| Deployment type | Cloud | Hybrid |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Ammune.ai | Promptfoo |
| Headquarters | – | – |

### Use cases and capabilities

| | Ammune API Discovery | Promptfoo Guardrails |
|---|---|---|
| Bot Protection | Yes | – |
| DDoS | Yes | – |
| OWASP | Yes | – |
| WAF | Yes | – |
| LLM Guardrails | – | Yes |
| LLM Security | – | Yes |
| AI Firewall | – | Yes |
| Prompt Injection | – | Yes |
| GenAI Security | – | Yes |
| Red Team | – | Yes |
| Generative AI | – | Yes |
| Continuous Testing | – | Yes |
| Adversarial ML | – | Yes |
| AI Governance | – | Yes |

### Core features

**Ammune API Discovery**

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

**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.

- [Ammune API Discovery](https://cybersectools.com/tools/ammune-api-discovery) fits if you want a cloud product.
- [Promptfoo Guardrails](https://cybersectools.com/tools/promptfoo-guardrails) fits if you need both cloud and on-premises options and you are a startup.

## Ammune API Discovery vs Promptfoo Guardrails FAQ

Common questions when comparing Ammune API Discovery vs Promptfoo Guardrails for API security.

### What is the difference between Ammune API Discovery and Promptfoo Guardrails?

**Ammune API Discovery**: API security platform with discovery, WAF, bot protection, and DDoS defense. Built by Ammune.ai.

**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 Ammune API Discovery and Promptfoo Guardrails?

**Ammune API Discovery** is made by Ammune.ai. **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 Ammune API Discovery a good alternative to Promptfoo Guardrails?

In part. Ammune API Discovery and Promptfoo Guardrails are not in the same category on CybersecTools. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Ammune API Discovery vs Wallarm API Security](https://cybersectools.com/compare/ammune-api-discovery-vs-wallarm-api-security)
- [Ammune API Discovery vs Imperva API Security](https://cybersectools.com/compare/ammune-api-discovery-vs-imperva-api-security)
- [Ammune API Discovery vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/ammune-api-discovery-vs-indusface-apptrana-api-protection)
- [Promptfoo Guardrails vs Wallarm API Security](https://cybersectools.com/compare/promptfoo-guardrails-vs-wallarm-api-security)
- [Promptfoo Guardrails vs Imperva API Security](https://cybersectools.com/compare/imperva-api-security-vs-promptfoo-guardrails)
- [Promptfoo Guardrails vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/indusface-apptrana-api-protection-vs-promptfoo-guardrails)

## Alternatives to each

- [See all Ammune API Discovery alternatives](https://cybersectools.com/alternatives/ammune-api-discovery)
- [See all Promptfoo Guardrails alternatives](https://cybersectools.com/alternatives/promptfoo-guardrails)

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Source: https://cybersectools.com/compare/ammune-api-discovery-vs-promptfoo-guardrails

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More on Ammune API Discovery 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