It suits application teams that want to inspect LLM requests before they reach a provider, including for prompt injection, PII, or data leakage risks.
Free plan From $19 a month WebWindowsMacLinuxBrowser extensionAPI+1
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Best LLM Security Tools 2026
Facts read 22 Sep 2026 – 21 Oct 2026
Safeguarding an LLM application can involve controls for different kinds of risk. Compare model-abuse detection, output guardrails, and prompt injection defense, then consider whether PII redaction or secrets detection is relevant to your needs. Deployment model helps you assess operational fit, while free-plan availability and paid-from pricing provide cost points to weigh. The entries include Sanctum Runtime, Amazon Bedrock Guardrails, and Openlayer Guardrails, along with PromptGuard and GLACIS. Lasso AI Security Platform, WitnessAI, and HiddenLayer AI Guardrails are also listed. Match the specific protections and deployment options shown to the safeguards you are looking to put in place.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 PromptGuard | It suits application teams that want to inspect LLM requests before they reach a provider, including for prompt injection, PII, or data leakage risks. | 5.7 | $19 a month | Free plan | Web, Windows, Mac, Linux | 14 Oct 2026 |
| 02 Prompt Inspector | It suits developers and teams adding prompt safety checks to applications through APIs, SDKs, or MCP. | 5.6 | Free plan | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 |
| 03 NVIDIA NeMo Guardrails | NeMo Guardrails is for developers and teams building LLM applications that need configurable policy checks. | 5.4 | Free plan | Free plan | Windows, Mac, Linux, API | 15 Oct 2026 |
| 04 CyberSecEval | CyberSecEval suits people evaluating cybersecurity risks or defensive behavior in large language models. | 5.1 | Free plan | Free plan | Web, Mac, Linux, API | 15 Oct 2026 |
| 05 Sanctum Runtime | It suits teams building AI agents, robotics, workflow automation, or other systems that can take real-world actions. | 4.9 | Free plan | Free plan | Android, iPhone & iPad, Web, Linux | 9 Oct 2026 |
| 06 Openlayer Guardrails | It suits engineering, AI, security, compliance, and finance teams working with AI systems, including teams in healthcare and financial services. | 4.8 | Free plan | Free plan | Web, API, Self-hosted | 21 Oct 2026 |
| 07 Inferwall | Inferwall suits teams operating their own LLM infrastructure and wanting configurable input and output screening. | 4.6 | Free plan | Free plan | Windows, Mac, Linux, API | 7 Oct 2026 |
| 08 GuardionAI | 4.5 | — | Free trial | Web, Windows, Mac, Linux | 21 Oct 2026 | |
| 09 VotalAI | VotalAI is aimed at enterprise AI teams, including platform and security engineers, that need policies and visibility around agent prompts, outputs, and tool calls. | 4.5 | Free plan | Free plan | Web, API, Self-hosted | 7 Oct 2026 |
| 10 Guardrails AI | It may suit teams building chatbots, RAG pipelines, or agents that need checks for risks such as PII exposure or jailbreaks. | 4.2 | Free plan | Free plan | Web, API, Self-hosted | 5 Oct 2026 |
02
Prompt Inspector
It suits developers and teams adding prompt safety checks to applications through APIs, SDKs, or MCP.
WebWindowsMac+3 Record5.6 Visit
03
NVIDIA NeMo Guardrails
NeMo Guardrails is for developers and teams building LLM applications that need configurable policy checks.
WindowsMacLinux+2 Record5.4 Visit
04
CyberSecEval
CyberSecEval suits people evaluating cybersecurity risks or defensive behavior in large language models.
WebMacLinux+2 Record5.1 Visit
05
Sanctum Runtime
It suits teams building AI agents, robotics, workflow automation, or other systems that can take real-world actions.
AndroidiPhone & iPadWeb+3 Record4.9 Visit
6
Openlayer Guardrails
WebAPISelf-hosted Free plan Record4.8 Visit It suits engineering, AI, security, compliance, and finance teams working with AI systems, including teams in healthcare and financial services.
7
Inferwall
WindowsMacLinux+1 Free plan Record4.6 Visit Inferwall suits teams operating their own LLM infrastructure and wanting configurable input and output screening.
9
VotalAI
WebAPISelf-hosted Free plan Record4.5 Visit VotalAI is aimed at enterprise AI teams, including platform and security engineers, that need policies and visibility around agent prompts, outputs, and tool calls.
10
Guardrails AI
WebAPISelf-hosted Free plan Record4.2 Visit It may suit teams building chatbots, RAG pipelines, or agents that need checks for risks such as PII exposure or jailbreaks.
11
LLM Guard
LinuxAPISelf-hosted Free plan Record4.2 Visit It is aimed at developers building LLM applications who want self-hosted prompt and output scanners or documented integrations.
13
GLACIS
WebAPISelf-hosted Free plan Record4.1 Visit GLACIS may suit AI-agent builders or operators and teams selling AI to healthcare or other regulated buyers.
17
WitnessAI
WebWindowsAPI — Record3.8 Visit WitnessAI is aimed at enterprises managing AI use across employees, applications, developers, and agents.
20
Check Point AI Guardrails
WebAPISelf-hosted — Record3.6 Visit It is aimed at organizations governing enterprise LLM applications and agent interactions.
23
Lasso AI Security Platform
WebBrowser extensionAPI — Record3.6 Visit Lasso is designed for enterprises managing AI applications, agents, and connected resources.
25
ZeroTrusted AI Firewall
WebSelf-hosted — Record3.5 Visit This product suits organizations governing AI models, agents, sensitive information, and tool access.
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