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TrojAI Defend is a commercial llm guardrails tool by Troj AI. Witness Protect is a commercial llm guardrails tool by WitnessAI. Compare features, ratings, integrations, and community reviews side by side to find the best llm guardrails fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Security teams deploying internal GenAI applications or third-party tools like ChatGPT will find TrojAI Defend essential for blocking prompt injection and jailbreak attacks at runtime without rebuilding your stack. The 10+ million tokens-per-second filtering capacity and OWASP/MITRE alignment mean you get detection that actually scales to production workloads, plus the browser extension handles unmanaged SaaS use. Skip this if your primary concern is post-incident forensics rather than prevention; TrojAI prioritizes real-time blocking over deep historical analysis.
Mid-market and enterprise security teams deploying AI agents across Microsoft environments need Witness Protect for its bidirectional runtime defense that actually blocks prompt injection and jailbreak attempts before they execute, not after telemetry arrives. The multi-step jailbreak detection and network-level visibility of AI interactions map directly to NIST PR.PS and DE.CM, covering both prevention and continuous monitoring where most guardrails only handle one. Skip this if your AI use cases are limited to read-only chatbots or if you lack the integration footprint to justify a dedicated firewall layer.
AI firewall for runtime protection of AI models, applications, and agents
Enterprise AI firewall protecting AI agents, models, and chatbots from attacks
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Common questions about comparing TrojAI Defend vs Witness Protect for your llm guardrails needs.
TrojAI Defend: AI firewall for runtime protection of AI models, applications, and agents. built by Troj AI. headquartered in Canada. Core capabilities include Real-time monitoring and blocking of AI inputs and outputs, Protection against prompt injection attacks, Jailbreaking prevention..
Witness Protect: Enterprise AI firewall protecting AI agents, models, and chatbots from attacks. built by WitnessAI. headquartered in United States. Core capabilities include Bidirectional runtime defense for AI applications and agents, Prompt injection and jailbreak detection and blocking, Output filtering before user delivery or agent execution..
Both serve the LLM Guardrails market but differ in approach, feature depth, and target audience.
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