# Onyx Platform vs Repello MCP Gateway: side-by-side comparison (2026)

[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). [Repello MCP Gateway](https://cybersectools.com/tools/repello-mcp-gateway) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Repello AI](https://cybersectools.com/companies/repello-ai). 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

| | Onyx Platform | Repello MCP Gateway |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Agentic AI Security | Agentic AI Security |
| Verified | No | No |
| Deployment type | Hybrid | Hybrid |
| Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | Onyx Security | Repello AI |
| Headquarters | – | – |

### Use cases and capabilities

| | Onyx Platform | Repello MCP Gateway |
|---|---|---|
| Agentic AI Security | Yes | – |
| AI Governance | Yes | – |
| AI Observability | Yes | – |
| AI SPM | Yes | – |
| LLM Guardrails | Yes | – |
| LLM Security | Yes | – |
| MCP Security | Yes | Yes |
| Prompt Injection | Yes | – |
| Shadow AI | Yes | – |
| GenAI Security | Yes | – |
| Gateway | – | Yes |
| Policy | – | Yes |
| Generative AI | – | Yes |

### Core features

**Onyx Platform**

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

**Repello MCP Gateway**

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

### Integrations

**Onyx Platform**

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

**Repello MCP Gateway**

No integrations listed.

## Onyx Platform vs Repello MCP Gateway FAQ

Common questions when comparing Onyx Platform vs Repello MCP Gateway for agentic AI security.

### What is the difference between Onyx Platform and Repello MCP Gateway?

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

**Repello MCP Gateway**: Security gateway for monitoring and protecting MCP-based AI agent tool calls, built by Repello AI.

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

### Who makes Onyx Platform and Repello MCP Gateway?

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

### Is Onyx Platform a good alternative to Repello MCP Gateway?

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

## Related comparisons

- [Onyx Platform vs CodeIntegrity AARM Platform](https://cybersectools.com/compare/codeintegrity-aarm-platform-vs-onyx-platform)
- [Onyx Platform vs Highflame Platform](https://cybersectools.com/compare/highflame-platform-vs-onyx-platform)
- [Onyx Platform vs Oryo](https://cybersectools.com/compare/onyx-platform-vs-oryo)
- [Repello MCP Gateway vs CodeIntegrity AARM Platform](https://cybersectools.com/compare/codeintegrity-aarm-platform-vs-repello-mcp-gateway)
- [Repello MCP Gateway vs Highflame Platform](https://cybersectools.com/compare/highflame-platform-vs-repello-mcp-gateway)
- [Repello MCP Gateway vs Oryo](https://cybersectools.com/compare/oryo-vs-repello-mcp-gateway)

## Alternatives to each

- [See all Onyx Platform alternatives](https://cybersectools.com/alternatives/onyx-platform)
- [See all Repello MCP Gateway alternatives](https://cybersectools.com/alternatives/repello-mcp-gateway)

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Source: https://cybersectools.com/compare/onyx-platform-vs-repello-mcp-gateway

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

More on Onyx Platform and Repello MCP Gateway: 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