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Best AI Guardrail Software in 2026
AI guardrail software can help you define protections for AI prompts, outputs, and data. Compared on custom policies, deployment, jailbreak detection, prompt injection defense, PII detection, and SDK languages, these entries give you several ways to assess safeguards and integration fit. Free-plan availability and paid-from pricing add cost context. PromptGuard, Amazon Bedrock Guardrails, and Enkrypt AI Guardrails are among the products to compare. Consider which risks matter in your use case, where controls need to run, and which development languages your stack uses; check each product’s details against those requirements.
- 23 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
CyberSecEval
Free plan Open source APILinuxMac+2CyberSecEval covers several cybersecurity risks as well as defensive capabilities, with distinct benchmarks for code, prompt injection, patch generation, and SOC reasoning.
- 2
NVIDIA NeMo Guardrails
Free plan Open source APILinuxMac+2NeMo Guardrails offers a broad set of configurable checks and several ways to integrate them into an LLM application.
- 3
Enkrypt AI Guardrails
Free plan APISelf-hostedWebEnkrypt AI Guardrails offers multiple enforcement points and records decisions for audit evidence.
- 4
Fiddler Guardrails
Free plan APISelf-hostedWeb - 5
LLM Guard
Free plan APILinuxSelf-hostedLLM Guard brings a broad set of prompt and output scanners to a self-hosted toolkit with framework examples and API deployment.
- 6
Guardrails AI
Free plan APISelf-hostedWebGuardrails AI combines validators, risk protections, and structured-data generation in an open-source Python framework.
- 7
Openlayer Guardrails
Free plan APISelf-hostedWebOpenlayer Guardrails combines configurable runtime controls with records of policy evaluations and outcomes.
- 8
Oracle Mobile Authenticator
by Oracle Mobile AuthenticatorFree plan AndroidiPhoneWindowsChoose Oracle Mobile Authenticator if you need a free second sign-in method with passcodes or push approvals. It is also suited to offline passcode generation.
- 9
PromptGuard
Free plan APIExtensionLinux+4PromptGuard combines LLM request screening with deployment choices from managed cloud to air-gapped operation.
- 10
OpenSecureAI Prompt Firewall
Free plan Self-hostedWebPrompt Firewall combines text detection with configurable allow, flag, and block outcomes, and offers both browser and developer tools.
- 11
PII Firewall
Free plan LinuxSelf-hostedPII Firewall provides configurable PII handling before and after LLM processing, with traces and deletion controls.
- 12
Pangea AI Guard
Free plan APIExtensionSelf-hostedChoose Pangea AI Guard if an application needs configurable LLM threat and sensitive-data detection, with options for audit logging and deployment within a customer cloud boundary.
- 13
VotalAI
Free plan APISelf-hostedWebChoose VotalAI if your enterprise AI team needs runtime prompt and output checks alongside per-agent tool controls and identity.
- 14
Google Cloud Secret Manager
Free plan Web - 15
Check Point AI Guardrails
Paid APISelf-hostedWebAI Guardrails combines threat detection, monitoring, and controls for LLM applications and agent interactions. Buyers should review its processing and retention terms and request pricing.
- 16
Splunk Guardrails
Free plan Web - 17
HiddenLayer AI Runtime Security
Paid APILinuxSelf-hosted+1HiddenLayer combines runtime threat detection with controls and investigation features for AI systems. Buyers should clarify pricing and which enforcement controls are supported on their platforms.
- 18
OpenGuardrails
Paid APISelf-hostedWebOpenGuardrails offers runtime agent checks, a monitoring console, and private deployment options, with a commercial runtime and an open protocol specification.
- 19
OpenAI Guardrails
Paid APISelf-hostedWebOpenAI Guardrails offers configurable checks and evaluation tools for LLM applications, with documented integrations for OpenAI, Azure OpenAI and compatible APIs.
- 20
Amazon Bedrock Guardrails
Paid WebAmazon Bedrock Guardrails lists a range of controls for filtering content and sensitive information in model interactions.
4.8 Visit site - 21
- 22
Microsoft Custom Neural Voice
Paid WebChoose Microsoft Custom Neural Voice if you need professional custom voice model training, hosting, or synthesis, particularly with API access or commercial use.
4.5 Visit site - 23
Radware LLM Firewall
Paid
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price