The Best LLM Security Tools in 2026
We researched LLM security tools through their official websites, including pricing pages, plan tables and product documentation. Rankings consider each product’s core protection job, value for money and verified security features. Use this guide to compare tools for safer, more controlled language-model applications.
Our top picks
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Top ranked
Guardrails AI#1 of 309.3/10A broad open-source toolkit for runtime LLM validation, policy enforcement, and risk detection.
Open source
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Runner-up
LLM Guard#2 of 309.2/10A self-hosted toolkit for scanning prompts, outputs, PII, secrets, and LLM risks.
Open source
-
Top-ranked free plan
PromptGuard#5 of 308.9/10Affordable LLM red teaming with broad integrations and CI/CD testing.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 30 tools, best first
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Best forOpen-source runtime validation and policy enforcement
A broad open-source toolkit for runtime LLM validation, policy enforcement, and risk detection.
- Secrets detection
- PII redaction
- Output guardrails
9.3/10★★★★★Visit Guardrails AI -
Best forSelf-hosted prompt and output scanning
A self-hosted toolkit for scanning prompts, outputs, PII, secrets, and LLM risks.
- Secrets detection
- PII redaction
- Output guardrails
9.2/10★★★★★Visit LLM Guard -
Best forTeams wanting broad open-source guardrails
A broad, self-hosted toolkit for controlling inputs, outputs, tools, and AI-agent behavior.
- PII redaction
- Output guardrails
- Prompt injection defense
9.1/10★★★★★Visit NVIDIA -
Best forAWS-centric teams needing managed guardrails
A broad managed guardrail layer for teams building around Amazon Bedrock.
- Secrets detection
- PII redaction
- Output guardrails
9.0/10★★★★☆Visit AWS -
Best forAffordable teams needing LLM red teaming
Affordable LLM red teaming with broad integrations and CI/CD testing.
8.9/10★★★★☆Visit PromptGuard -
Best forEnterprises securing agents and AI supply chains
A broad enterprise platform for discovering, governing, testing, and protecting AI systems.
- Model-abuse detection
- Secrets detection
- PII redaction
8.8/10★★★★☆Visit Noma Security -
Best forOrganizations needing governed AI activity visibility
A broad control layer for governing employee, application, agent, and MCP activity.
- Model-abuse detection
- Secrets detection
- PII redaction
8.7/10★★★★☆Visit WitnessAI -
Best forTeams protecting multimodal agents and MCP
A runtime defense layer for teams securing multimodal agents and MCP connections.
- Model-abuse detection
- Secrets detection
- PII redaction
8.6/10★★★★☆Visit Straiker -
Best forSecurity teams needing broad inline AI protection
Broad inline protection for organizations running LLMs, agents, and AI APIs.
- Model-abuse detection
- Secrets detection
- PII redaction
8.5/10★★★★☆Visit ZeroTrusted.ai -
Best forMature enterprises needing AI gateway controls
A broad AI security platform for runtime inspection, guardrails and gateway enforcement.
- Secrets detection
- PII redaction
- Output guardrails
8.4/10★★★★☆Visit Prisma AIRS -
Best forSecurity teams needing broad AI threat monitoring
Broad AI threat monitoring with guardrails, telemetry, and enterprise deployment controls.
- Model-abuse detection
- Secrets detection
- PII redaction
8.3/10★★★★☆Visit GuardionAI -
Best forNewer teams needing AI discovery and red teaming
A broad AI security platform for discovery, runtime defense, governance, and red teaming.
- Model-abuse detection
- Secrets detection
- PII redaction
8.2/10★★★★☆Visit Lasso Security -
Best forTeams needing identity-aware agent guardrails
Identity-aware guardrails for securing prompts, outputs, tools, and agent actions.
- Secrets detection
- PII redaction
- Output guardrails
8.1/10★★★★☆Visit VotalAI -
Best forEnterprises needing agent and MCP controls
A broad runtime defense layer for enterprise LLM apps, agents, and MCP workflows.
- PII redaction
- Output guardrails
- Prompt injection defense
8.0/10★★★★☆Visit Check Point -
Best forTeams wanting free hybrid runtime policy controls
A hybrid runtime control layer for governing AI actions and recording decisions.
- PII redaction
- Output guardrails
- Prompt injection defense
7.9/10★★★★☆Visit GLACIS -
Best forTeams wanting free gateway-based guardrails
A free gateway and SDK layer for prompt, data, and output controls.
- PII redaction
- Output guardrails
- Prompt injection defense
7.8/10★★★★☆Visit Openlayer -
Best forLarge enterprises needing private deployment
A broad inline security layer for enterprises that need private deployment and policy control.
- Secrets detection
- PII redaction
- Output guardrails
7.7/10★★★★☆Visit SecureAI Guard -
Best forTeams securing multi-LLM user prompts
Rocotal adds prompt, response, access, and audit controls across multiple LLM providers.
- Secrets detection
- PII redaction
- Output guardrails
7.6/10★★★★☆Visit Rocotal -
Best forDevelopers wanting open-source local detection
A self-hosted LLM security layer for detecting attacks and sensitive data leaks.
- Secrets detection
- PII redaction
- Output guardrails
7.4/10★★★★☆Visit Inferwall -
Best forAPI teams needing inline safety controls
A focused API guardrails layer for teams protecting LLM and agent traffic.
- Model-abuse detection
- Secrets detection
- PII redaction
7.3/10★★★★☆Visit HiddenLayer -
Best forEnterprises needing edge-deployed AI protection
Enterprise AI protection spanning prompts, responses, policies, data, and model abuse.
- Model-abuse detection
- Output guardrails
- Prompt injection defense
7.2/10★★★★☆Visit Akamai -
Best forTeams needing browser and runtime protection
Broad LLM security coverage across browser, API, agent, and policy controls.
- Secrets detection
- PII redaction
- Output guardrails
7.1/10★★★★☆Visit Vigil Guard -
Best forDevelopers focused on prompt-injection detection
A focused prompt-injection defense layer with flexible deployment and developer tooling.
- Prompt injection defense
6.8/10★★★☆☆Try Prompt Inspector -
Best forTeams needing pre-production AI red teaming
A focused web-based red teaming product for testing LLM application risks before production.
6.7/10★★★☆☆Book a Demo -
Best forTeams governing connected AI actions
Govern connected AI actions with runtime checks, policies, approvals, and audit logs.
6.6/10★★★☆☆Try Sanctum Runtime -
Best forResearchers evaluating cyber-risk behavior
A broad, self-hosted benchmark for measuring LLM cyber-risk behavior—not runtime protection.
6.5/10★★★☆☆Visit CyberSecEval -
Best forTeams focused specifically on secret management
A focused cloud secret manager, not a complete LLM threat-protection layer.
6.4/10★★★☆☆Visit Google Cloud -
Best forTeams managing TLS certificates for web services
A Cloudflare add-on for teams that need more control over TLS certificates.
6.2/10★★★☆☆Visit Cloudflare -
Best forTeams building custom synthetic voices
A professional custom-voice platform, not an LLM security tool.
6.1/10★★★☆☆Visit Microsoft -
Best forNetwork teams, not LLM security teams
A broad Cisco network management system, not an LLM security control platform.
5.5/10★★★☆☆Visit Cisco
No tools match those filters.
Compare at a glance
| # | Tool | Paid from | Prompt injection defense | PII redaction | Secrets detection | Output guardrails | Score |
|---|---|---|---|---|---|---|---|
| 1 | Guardrails AI | Free | Yes | Yes | Yes | Yes | 9.3 |
| 2 | LLM Guard | Free | Yes | Yes | Yes | Yes | 9.2 |
| 3 | NVIDIA NeMo Guardrails | Free | Yes | Yes | Yes | 9.1 | |
| 4 | Amazon Bedrock Guardrails | $0.00075/unit usage-based | Yes | Yes | Yes | Yes | 9.0 |
| 5 | PromptGuard | $19/seat/mo | 8.9 | ||||
| 6 | Noma Security | Yes | Yes | Yes | Yes | 8.8 | |
| 7 | WitnessAI | Yes | Yes | Yes | Yes | 8.7 | |
| 8 | Straiker Defend AI | Yes | Yes | Yes | Yes | 8.6 | |
| 9 | ZeroTrusted AI Firewall | Yes | Yes | Yes | Yes | 8.5 | |
| 10 | Prisma AIRS | Yes | Yes | Yes | Yes | 8.4 | |
| 11 | GuardionAI | Yes | Yes | Yes | Yes | 8.3 | |
| 12 | Lasso AI Security Platform | Yes | Yes | Yes | Yes | 8.2 | |
| 13 | VotalAI | Yes | Yes | Yes | Yes | 8.1 | |
| 14 | Check Point AI Guardrails | Yes | Yes | Yes | 8.0 | ||
| 15 | GLACIS | Yes | Yes | Yes | 7.9 | ||
| 16 | Openlayer Guardrails | Yes | Yes | Yes | 7.8 | ||
| 17 | SecureAI Guard | $29,990/yr | Yes | Yes | Yes | Yes | 7.7 |
| 18 | Rocotal | Yes | Yes | Yes | Yes | 7.6 | |
| 19 | Inferwall | Free | Yes | Yes | Yes | Yes | 7.4 |
| 20 | HiddenLayer AI Guardrails | Yes | Yes | Yes | Yes | 7.3 | |
| 21 | Akamai Firewall for AI | Yes | Yes | 7.2 | |||
| 22 | Vigil Guard | Yes | Yes | Yes | Yes | 7.1 | |
| 23 | Prompt Inspector | Yes | 6.8 | ||||
| 24 | Prompt Security AI Red Teaming | 6.7 | |||||
| 25 | Sanctum Runtime | 6.6 | |||||
| 26 | CyberSecEval | Free | 6.5 | ||||
| 27 | Google Cloud Secret Manager | $0.03/unit/mo | 6.4 | ||||
| 28 | Cloudflare Advanced Certificate Manager | $10/mo | 6.2 | ||||
| 29 | Microsoft Custom Neural Voice | 6.1 | |||||
| 30 | Cisco Catalyst Center | 5.5 |
Head-to-head All 25 comparisons →
- Guardrails AI vs LLM Guard
- Guardrails AI vs PromptGuard
- Guardrails AI vs Noma Security
- Guardrails AI vs WitnessAI
- Guardrails AI vs Straiker Defend AI
- LLM Guard vs NVIDIA NeMo Guardrails
- LLM Guard vs Amazon Bedrock Guardrails
- LLM Guard vs PromptGuard
- LLM Guard vs Noma Security
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How we rank LLM security tools
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update