Best AI Security Tools
Platforms focused on securing AI systems—prompt injection defense, content moderation, PII detection, guardrails, and compliance for LLM applications.
16 tools compared · Layer 4 · Updated March 27, 2026
Top 5 AI Security Tools
Ranked by community traction, recent activity, and breadth of capabilities. Tap any tool for full pros, cons, pricing, and alternatives.
Wiz is the dominant cloud security platform and the leader in AI Security Posture Management (AI-SPM). Founded in January 2020 by Assaf Rappaport, Yinon Costica, Roy Reznik, and Ami Luttwak, Wiz automatically discovers and maps shadow AI pipelines, model deployments, and training data across AWS, Azure, and GCP.
+Comprehensive agentless cloud security with rapid deployment
Protect AI is an enterprise AI/ML security platform founded in 2022 by Badar Ahmed, Daryan Dehghanpisheh, and Ian Swanson. Headquartered in Seattle with offices in Berlin and Bangalore, Protect AI provides end-to-end security covering the entire model lifecycle. The platform includes model scanning for vulnerabilities, supply-chain security for ML artifacts, runtime threat detection, and policy enforcement. Protect AI helps enterprises secure AI pipelines from development through production deployment, addressing the growing need for specialized AI security tooling as organizations increasingly rely on machine learning models in production environments. The company serves enterprise customers with production AI deployments who require comprehensive security coverage across their ML operations.
+Comprehensive security coverage across the entire AI/ML lifecycle
Snyk is the leading developer-first security platform with comprehensive AI security capabilities. Founded in 2015 and headquartered in Boston, Snyk has evolved from an open-source vulnerability scanner into a full-spectrum application security platform. The company's Snyk for AI offering (evolved from DeepCode acquisition) scans code, dependencies, containers, and infrastructure-as-code for AI-specific vulnerabilities including insecure model loading, prompt injection risks, and vulnerable ML library dependencies. Developers can detect and fix security issues directly in their IDE and CI/CD pipelines, making Snyk the most widely adopted security tool among AI developers. The platform features an extensive and continuously updated vulnerability database, providing early detection of security issues. Snyk offers multiple product tiers including a free plan with limited features, a Team plan starting at $25/developer/month for small teams up to 10 developers, and custom Enterprise plans with advanced security features, SSO, and dedicated support for large organizations.
+Developer-friendly with seamless IDE and CI/CD integration for shift-left security
Lakera is an AI-native security company founded in 2021 in Zurich, Switzerland by Mateo Rojas Carulla, Matthias Kraft, and David Haber. The company provides real-time GenAI security solutions that protect enterprises from LLM vulnerabilities including prompt injection, data leakage, and jailbreaking attacks. Lakera's platform includes Lakera Guard for real-time protection of AI applications and Lakera Red for AI-powered red teaming and security testing. The Zurich-based team comprises individuals from over 15 nationalities and officially launched in October 2023 with million in funding. Following a M Series A round in July 2024 led by Atomico, with participation from Citi Ventures, Dropbox, and Redalpine, Lakera was acquired by Check Point Software Technologies. The company gained visibility through Gandalf, a popular prompt injection challenge that demonstrated LLM security vulnerabilities. Lakera offers a free Community plan for developers and custom Enterprise pricing for production applications.
- Prompt injection detection
- Content moderation
- PII detection and masking
+Real-time protection against prompt injection and LLM-specific attacks
HiddenLayer is an AI security company founded in March 2022 in Austin, Texas by James Ballard, Tanner Burns, and Chris Sestito. The company provides security solutions for machine learning algorithms and models, offering threat modeling, ML risk assessment training, red team assessment services, and AI/ML model scanning. HiddenLayer raised USD 50 million in Series A funding to safeguard AI systems from vulnerabilities and attacks. The platform offers a Free Tier with limited features for initial exploration and an Enterprise Tier with custom solutions starting at USD 500 per month, with pricing determined based on organizational scale and specific requirements. HiddenLayer focuses on securing the entire ML lifecycle, from model development through production deployment, addressing the growing need for specialized AI security as organizations increasingly deploy machine learning models in critical applications. The company serves enterprise customers requiring comprehensive AI security coverage.
+Free tier enables evaluation without upfront costs
More AI Security tools
CalypsoAI provides AI security and governance tools for enterprises deploying LLMs. Its platform offers automated red-teaming, risk scoring, content moderation, and compliance monitoring. CalypsoAI helps organizations enforce security policies across AI applications with granular access controls and audit trails.
Robust Intelligence, acquired by Cisco in late 2024, provides AI validation and protection. Now integrated into Cisco's security portfolio, the platform offers automated red-teaming, continuous model validation, and runtime firewall protection for LLM applications. It detects adversarial attacks, data poisoning, hallucinations, and prompt injections across the AI lifecycle.
Prompt Security provides enterprise GenAI security across the entire AI stack. Their platform protects against prompt injection, data exfiltration, harmful content, and shadow AI usage. It works as a transparent proxy for all LLM traffic, enabling centralized security policy enforcement without changing application code.
Guardrails AI is an open-source framework for adding safety guardrails to LLM applications. It provides validators for output quality, format compliance, toxicity, PII detection, and custom business rules. Guardrails AI intercepts LLM outputs and automatically retries or corrects responses that fail validation.
Pangea is the "Twilio for Security" — a set of composable security APIs that developers embed directly into AI applications. It provides audit logging, data redaction, embargo compliance, IP reputation, and domain intelligence as simple API calls. For AI apps, Pangea's Redact API strips PII from prompts, its AI Guard detects prompt injections, and its Audit API creates tamper-proof logs of all AI interactions.
NVIDIA NeMo Guardrails is an open-source toolkit for adding programmable guardrails to LLM applications. It provides a modeling language (Colang) for defining conversation flows, topic boundaries, safety checks, and fact-checking rails. Integrates with any LLM and supports both input and output validation.
Nightfall AI provides data loss prevention (DLP) for AI applications.
Lasso Security provides cybersecurity for large language models, protecting enterprises from LLM-specific threats. Their platform monitors and secures LLM interactions, detecting prompt injection, data leakage, and unauthorized access patterns. Lasso provides visibility into how AI is being used across the organization and enforces security policies.
Discovers all AI tools in use across an enterprise, monitors data flows in real time, and lets security teams block sensitive data from unauthorized AI.
Runtime guardrails API that validates AI agent actions against policies before execution, blocking incorrect actions with structured feedback.