Head-to-head · AI Guardrail Software
HiddenLayer AI Runtime Security vs Splunk Guardrails
HiddenLayer AI Runtime Security leads on 0 checks, Splunk Guardrails on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreHiddenLayer AI Runtime Security · 8.4/10
- Free planonly Splunk Guardrails
- Most featuresHiddenLayer AI Runtime Security · 4 of 4
HiddenLayer AI Runtime Security scores higher on our rubric for ai guardrail software: 8.4 against 8.3 out of 10; our editors rank them #7 and #8.
HiddenLayer AI Runtime Security is the better fit for security teams monitoring AI runtime activity. Splunk Guardrails is the better fit for framework-agnostic enterprise agent governance.
- HiddenLayer AI Runtime Security fits best
Security teams monitoring AI runtime activity
- Splunk Guardrails fits best
Framework-agnostic enterprise agent governance
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Side by side
| Feature | HiddenLayer AI Runtime Security 8.4/10 Visit ↗ | Splunk Guardrails 8.3/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 8.4 | 8.3 |
| Ranking | #7 in AI Guardrail Software | #8 in AI Guardrail Software |
| Best for | Security teams monitoring AI runtime activity | Framework-agnostic enterprise agent governance |
| Pricing model | Paid | Free plan + paid |
| Starting price | Pricing on request | $100/unit/mo |
| Free plan | Not checked yet | ✓ (best) |
| Free trial | — | — |
| Deployment | Cloud, Self-hosted | Cloud, Self-hosted |
| Platforms | Web | Web |
| Support | Email, Docs | Docs |
| Integrations | 10 integrations | 10 integrations |
| Built for | Enterprise, Mid-market | Mid-market, Enterprise |
| Features HiddenLayer AI Runtime Security 4/4 · Splunk Guardrails 3/4 | ||
| Prompt injection defense | ✓ | ✓ |
| PII detection | ✓ | ✓ |
| Jailbreak detection | ✓ (best) | Not checked yet |
| Custom policies | ✓ | ✓ |
| Specs | ||
| Deployment | Hybrid | Hybrid |
| SDK languages | Python, TypeScript, JavaScript | Python |
| Our review | ||
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| Our verdict | HiddenLayer AI Runtime Security is designed for enterprises operating AI applications, agents, and agentic workflows in production. It monitors runtime activity and detects prompt injection, indirect attacks, jailbreak attempts, unsafe… Read the review → |
Splunk Guardrails provides runtime controls for AI agents and generative AI applications. It evaluates proposed actions between an agent and its tools, then allows, blocks, or redirects them according to configured policies. The product is… Read the review → |
Strengths and trade-offs
HiddenLayer AI Runtime Security — where it wins
- Continuous visibility across AI applications, agents, and workflows
- Detects injection, jailbreaks, sensitive data, and unsafe tool use
- Hybrid deployment with SIEM, SOAR, model, and gateway integrations
Where it doesn't
- Pricing requires a contact-sales process
- The product is proprietary rather than open source
- Its enterprise security focus may exceed simpler AI monitoring needs
Splunk Guardrails — where it wins
- Blocks prompt injection, PII, PHI, PCI leakage, and tool misuse
- Supports VPC, on-premises, and air-gapped deployment
- Integrates with major agent SDKs and frameworks
Where it doesn't
- Paid access starts at $100 per month with annual billing
- Pricing is presented under Splunk Agent Observability
- Python is the listed SDK language
- HiddenLayer AI Runtime Security8.4/10 · Pricing on request
A security-focused runtime layer for monitoring and controlling production AI activity.
Visit HiddenLayerFull verdict → - Splunk Guardrails8.3/10 · Free plan
A framework-agnostic control plane for evaluating and blocking risky agent actions.
Visit SplunkFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Last updated · How we research and update