# Onyx Platform vs Rein Agentic AI Security Platform: 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). [Rein Agentic AI Security Platform](https://cybersectools.com/tools/rein-security-rein-application-security-platform) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Rein Security](https://cybersectools.com/companies/rein-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 | | Onyx Platform | Rein Agentic AI Security Platform | |---|---|---| | 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 | Rein Security | | Headquarters | – | – | ### Use cases and capabilities | | Onyx Platform | Rein Agentic AI Security Platform | |---|---|---| | Agentic AI Security | Yes | Yes | | AI Governance | Yes | – | | AI Observability | Yes | Yes | | AI SPM | Yes | – | | LLM Guardrails | Yes | – | | LLM Security | Yes | – | | MCP Security | Yes | – | | Prompt Injection | Yes | – | | Shadow AI | Yes | – | | GenAI Security | Yes | – | | Runtime Security | – | Yes | | Anomaly Detection | – | Yes | | AI Compliance | – | Yes | | Visibility | – | Yes | | SCA | – | Yes | | SAST | – | Yes | | Supply Chain Security | – | Yes | | Vulnerability | – | Yes | ### Core features **Onyx Platform** 10 features listed. Sign in on the page to see them. **Rein Agentic AI Security Platform** 10 features listed. Sign in on the page to see them. ### Integrations **Onyx Platform** 11 integrations listed. Sign in on the page to see them. **Rein Agentic AI Security Platform** No integrations listed. ## Onyx Platform vs Rein Agentic AI Security Platform FAQ Common questions when comparing Onyx Platform vs Rein Agentic AI Security Platform for agentic AI security. ### What is the difference between Onyx Platform and Rein Agentic AI Security Platform? **Onyx Platform**: AI control plane for enterprise AI agent security, governance, and observability, built by Onyx Security. **Rein Agentic AI Security Platform**: Runtime sidecar for visibility, control and posture of custom enterprise AI agents, built by Rein Security. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Onyx Platform and Rein Agentic AI Security Platform? **Onyx Platform** is made by Onyx Security. **Rein Agentic AI Security Platform** is made by Rein Security. 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 Rein Agentic AI Security Platform? Often, yes. Onyx Platform and Rein Agentic AI Security Platform are both Agentic AI Security products, and both cover Agentic AI Security, AI Observability. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Onyx Platform vs Autonomous Security](https://cybersectools.com/compare/autonomous-security-vs-onyx-platform) - [Onyx Platform vs Oryo](https://cybersectools.com/compare/onyx-platform-vs-oryo) - [Onyx Platform vs AIR](https://cybersectools.com/compare/air-vs-onyx-platform) - [Rein Agentic AI Security Platform vs Autonomous Security](https://cybersectools.com/compare/autonomous-security-vs-rein-security-rein-application-security-platform) - [Rein Agentic AI Security Platform vs Oryo](https://cybersectools.com/compare/oryo-vs-rein-security-rein-application-security-platform) - [Rein Agentic AI Security Platform vs AIR](https://cybersectools.com/compare/air-vs-rein-security-rein-application-security-platform) ## Alternatives to each - [See all Onyx Platform alternatives](https://cybersectools.com/alternatives/onyx-platform) - [See all Rein Agentic AI Security Platform alternatives](https://cybersectools.com/alternatives/rein-security-rein-application-security-platform) --- Source: https://cybersectools.com/compare/onyx-platform-vs-rein-security-rein-application-security-platform 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 Rein Agentic AI Security 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