# FirstHelm vs Onyx Platform: side-by-side comparison (2026)

[FirstHelm](https://cybersectools.com/tools/firsthelm) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [FirstHelm](https://cybersectools.com/companies/firsthelm). [Onyx Platform](https://cybersectools.com/tools/onyx-platform) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Onyx Security](https://cybersectools.com/companies/onyx-security). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Agentic AI Security Solutions for Business](https://cybersectools.com/shortlists/best-agentic-ai-security-solutions) picks CrowdStrike Falcon Guardian, Rubrik Agent Cloud, Silverfort AI Agent Security and 4 more.

## Side-by-side comparison

| | FirstHelm | Onyx Platform |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Agentic AI Security | Agentic AI Security |
| Verified | No | No |
| Deployment type | Cloud | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | FirstHelm | Onyx Security |
| Headquarters | – | – |

### Use cases and capabilities

| | FirstHelm | Onyx Platform |
|---|---|---|
| Agentic AI Security | Yes | Yes |
| AI Governance | Yes | Yes |
| AI Compliance | Yes | – |
| AI Observability | Yes | Yes |
| Rule Engine | Yes | – |
| Policy | Yes | – |
| Security Audit | Yes | – |
| Alerting | Yes | – |
| Authorization | Yes | – |
| REST API | Yes | – |
| AI SPM | – | Yes |
| LLM Guardrails | – | Yes |
| LLM Security | – | Yes |
| MCP Security | – | Yes |
| Prompt Injection | – | Yes |
| Shadow AI | – | Yes |
| GenAI Security | – | Yes |

### Core features

**FirstHelm**

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

**Onyx Platform**

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

### Integrations

**FirstHelm**

21 integrations listed. Sign in on the page to see them.

**Onyx Platform**

11 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.

- [FirstHelm](https://cybersectools.com/tools/firsthelm) fits if you want a cloud product and you are a startup or a small business.
- [Onyx Platform](https://cybersectools.com/tools/onyx-platform) fits if you need both cloud and on-premises options.

## FirstHelm vs Onyx Platform FAQ

Common questions when comparing FirstHelm vs Onyx Platform for agentic AI security.

### What is the difference between FirstHelm and Onyx Platform?

**FirstHelm**: AI agent control plane enforcing rules, approvals and audit trails on autonomous agents, built by FirstHelm.

**Onyx Platform**: AI control plane for enterprise AI agent security, governance, and observability, built by Onyx Security.

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

### Who makes FirstHelm and Onyx Platform?

**FirstHelm** is made by FirstHelm. **Onyx Platform** is made by Onyx Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is FirstHelm a good alternative to Onyx Platform?

Often, yes. FirstHelm and Onyx Platform are both Agentic AI Security products, and both cover Agentic AI Security, AI Governance, AI Observability. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [FirstHelm vs CodeIntegrity AARM Platform](https://cybersectools.com/compare/codeintegrity-aarm-platform-vs-firsthelm)
- [FirstHelm vs HikmaAI](https://cybersectools.com/compare/firsthelm-vs-hikmaai)
- [FirstHelm vs Highflame Platform](https://cybersectools.com/compare/firsthelm-vs-highflame-platform)
- [Onyx Platform vs CodeIntegrity AARM Platform](https://cybersectools.com/compare/codeintegrity-aarm-platform-vs-onyx-platform)
- [Onyx Platform vs HikmaAI](https://cybersectools.com/compare/hikmaai-vs-onyx-platform)
- [Onyx Platform vs Highflame Platform](https://cybersectools.com/compare/highflame-platform-vs-onyx-platform)

## Alternatives to each

- [See all FirstHelm alternatives](https://cybersectools.com/alternatives/firsthelm)
- [See all Onyx Platform alternatives](https://cybersectools.com/alternatives/onyx-platform)

---

Source: https://cybersectools.com/compare/firsthelm-vs-onyx-platform

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

More on FirstHelm and Onyx Platform: 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