# Capsule Runtime Security for AI Agents vs Repello AI SkillCheck: side-by-side comparison (2026)

[Capsule Runtime Security for AI Agents](https://cybersectools.com/tools/capsule-runtime-security-for-ai-agents) is a commercial [agentic AI security](https://cybersectools.com/categories/agentic-ai-security) solution by [Capsule Security](https://cybersectools.com/companies/capsule-security). [Repello AI SkillCheck](https://cybersectools.com/tools/repello-ai-skillcheck) is a free [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 5 more.

## Side-by-side comparison

| | Capsule Runtime Security for AI Agents | Repello AI SkillCheck |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Agentic AI Security | Agentic AI Security |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Capsule Security | Repello AI |
| Headquarters | – | – |

### Use cases and capabilities

| | Capsule Runtime Security for AI Agents | Repello AI SkillCheck |
|---|---|---|
| Agentic AI Security | Yes | – |
| Runtime Security | Yes | – |
| AI Observability | Yes | – |
| LLM Security | Yes | – |
| LLM Guardrails | Yes | – |
| Prompt Injection | Yes | – |
| OWASP | Yes | – |
| MITRE ATT&CK | Yes | – |
| NIST | Yes | – |
| Least Privilege | Yes | – |
| Security Scanning | – | Yes |
| Vulnerability | – | Yes |
| MLSecOps | – | Yes |
| Generative AI | – | Yes |
| Security Tools | – | Yes |

### Core features

**Capsule Runtime Security for AI Agents**

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

**Repello AI SkillCheck**

4 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.

- [Repello AI SkillCheck](https://cybersectools.com/tools/repello-ai-skillcheck) fits if you are a startup or a small business and you need a free product.

## Capsule Runtime Security for AI Agents vs Repello AI SkillCheck FAQ

Common questions when comparing Capsule Runtime Security for AI Agents vs Repello AI SkillCheck for agentic AI security.

### What is the difference between Capsule Runtime Security for AI Agents and Repello AI SkillCheck?

**Capsule Runtime Security for AI Agents**: Runtime security platform for AI agents with discovery, observability, and enforcement. Built by Capsule Security.

**Repello AI SkillCheck**: Scans and catalogs AI agent skills/plugins for security vulnerabilities. Built by Repello AI.

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

### Who makes Capsule Runtime Security for AI Agents and Repello AI SkillCheck?

**Capsule Runtime Security for AI Agents** is made by Capsule Security. **Repello AI SkillCheck** 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 Capsule Runtime Security for AI Agents a good alternative to Repello AI SkillCheck?

Often, yes. Capsule Runtime Security for AI Agents and Repello AI SkillCheck are both Agentic AI Security products. Key differences: Capsule Runtime Security for AI Agents is Commercial while Repello AI SkillCheck is Free. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Capsule Runtime Security for AI Agents vs Certiv](https://cybersectools.com/compare/capsule-runtime-security-for-ai-agents-vs-certiv)
- [Capsule Runtime Security for AI Agents vs Tenet Security Platform](https://cybersectools.com/compare/capsule-runtime-security-for-ai-agents-vs-tenet-security-platform)
- [Capsule Runtime Security for AI Agents vs Verno Labs Platform](https://cybersectools.com/compare/capsule-runtime-security-for-ai-agents-vs-verno-labs-platform)
- [Repello AI SkillCheck vs Certiv](https://cybersectools.com/compare/certiv-vs-repello-ai-skillcheck)
- [Repello AI SkillCheck vs Tenet Security Platform](https://cybersectools.com/compare/repello-ai-skillcheck-vs-tenet-security-platform)
- [Repello AI SkillCheck vs Verno Labs Platform](https://cybersectools.com/compare/repello-ai-skillcheck-vs-verno-labs-platform)

## Alternatives to each

- [See all Capsule Runtime Security for AI Agents alternatives](https://cybersectools.com/alternatives/capsule-runtime-security-for-ai-agents)
- [See all Repello AI SkillCheck alternatives](https://cybersectools.com/alternatives/repello-ai-skillcheck)

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Source: https://cybersectools.com/compare/capsule-runtime-security-for-ai-agents-vs-repello-ai-skillcheck

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

More on Capsule Runtime Security for AI Agents and Repello AI SkillCheck: 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