Best Guardrails AI OSS Alternatives & Competitors in 2026

Portkey Guardrails for Bedrock

Configurable guardrails for Amazon Bedrock AI requests via an API gateway.

Vijil Dome

Runtime LLM guardrails blocking prompt injections, PII leakage & policy violations.

Airia AI Platform Guardrails

Runtime AI guardrails securing prompts, outputs, and agent workflows.

RealmGuard

AI guardrail platform detecting harmful outputs, prompt injections & policy violations.

AI Model Guardrails

Runtime AI guardrails platform enforcing policies on LLM prompts and responses.

First Recon AI Firewall

Inline firewall inspecting AI prompts/responses for injections & policy violations.

Pangea AI Security Platform

Platform securing AI apps and employee AI use via guardrails & threat detection.

SlashLLM

AI security platform proxying LLM traffic with guardrails, SOC, and governance.

Vulcan Protect

Runtime guardrail platform that monitors and protects GenAI inputs/outputs in production

Openlayer LLM Observability

LLM pipeline observability: tracing, monitoring, and alerting for GenAI systems.

ThirdLaw AI Control Layer

Runtime AI policy enforcement: capture, evaluate, intervene, and investigate AI sessions.

Promptfoo Guardrails

Adaptive LLM guardrails that self-improve via red team feedback loops.

Confident Security

Platform for securing, governing, and monitoring AI/LLM deployments.

AI Security Gateway™

OpenAI-compatible proxy for LLM DLP, PII redaction, and cost governance.

PointGuard AI Intelligent Guardrails

Runtime guardrails for LLM prompts/responses: detects data leaks & prompt injection.

Senthex AI Firewall

Proxy-based AI firewall with 26 shields and verifiable audit trail for LLMs.

LLM Guard

LLM Guard is a security toolkit that enhances the safety and security of interactions with Large Language Models (LLMs) by providing features like sanitization, harmful language detection, data leakage prevention, and resistance against prompt injection attacks.

Secured AI

Privacy-first AI assistant that protects sensitive information while preserving context.

Barrikade Core

Prompt-injection detection and stateful session controls for AI agents

FireGuard

Policy enforcement & monitoring layer for Microsoft Copilot deployments.

CloudMatos Prompt Firewall

Firewall for LLM systems preventing prompt injection, data leaks & jailbreaks

Alibaba Cloud AI Guardrails

Real-time AI content moderation and prompt injection defense for AIGC applications.

Magier AI

End-to-end LLM security platform protecting GenAI interactions & applications

CyCraft XecGuard

AI guardrail module protecting LLMs from prompt injection and jailbreak attacks

DeepKeep LLM

End-to-end LLM security platform protecting against attacks and data leakage

Impart LLM Security

LLM security platform detecting prompt injection, jailbreaks, and abuse

Prompt Security Platform

SentinelOne's Prompt Security: AI security platform plus open-source agent/LLM tools

Aiceberg Risk Signals Library

Library of AI threat detection signals for securing generative AI models

Eroun&Company SAIFE X

GenAI security platform protecting against data leaks and prompt attacks

AIShield Guardian

Middleware guardrail securing LLM inputs/outputs for enterprise GenAI compliance.

Akamai Firewall for AI

Firewall protecting LLMs from prompt attacks, data leaks, and harmful outputs

Tumerik AI Trust Score™

Real-time AI application security with trust scoring and guardrails

Tinfoil GPT-OSS Safeguard 120B

Safety reasoning model for content classification and trust & safety apps

SUPERWISE Guardrails

Runtime guardrails for AI/LLM apps blocking violations in under 10ms

Dynamo AI DynamoGuard

Real-time AI guardrails platform for detecting misuse, hallucinations & attacks

Verax Protect

Platform for monitoring and securing LLMs in production environments

F5 AI Guardrails

Runtime security for AI models, agents, and data with guardrails and compliance

TrojAI Defend

AI firewall for runtime protection of AI models, applications, and agents

Sinaptic AI Data Protection

Browser extension preventing PII/PHI leakage to AI services like ChatGPT

Witness Protect

Enterprise AI firewall protecting AI agents, models, and chatbots from attacks

VicOne xPhinx

Edge AI security for in-vehicle systems against prompt injection attacks

Fiddler Guardrails

Guardrails for protecting LLM and agentic applications from harmful content

Moderation & Policy Engine

Content moderation & policy enforcement for LLM applications

Daxa.ai Proxima

AI data gateway securing LLM interactions by monitoring and redacting sensitive data.

Daxa.ai Pebblo

Dual-layer AI security platform for RAG chatbots covering model and retrieval.

Protecto SaaS

SaaS API for PII/PHI detection & masking in AI workflows.

Protecto AI Guardrails

AI guardrails tool for PII/PHI detection, masking & content filtering in LLM apps.