Choose the Right AI Governance Layer
for Your Compliance Requirements

Guardrails AI is an open-source Python library that validates LLM output after the model has already generated a response. It checks whether the output matches a defined schema, passes a regex pattern, or is flagged by a validator function. This is useful for ensuring structured output quality.

For regulated industries, post-generation validation has a critical limitation: the action already happened. A lending AI that produced a biased credit decision did so before your validator ran. CoreGuard operates pre-execution — the decision is evaluated and certified before any action is taken.

• CG CoreGuard produces HMAC-SHA256 signed decision certificates — verifiable by regulators without re-running the evaluation. Guardrails AI has no cryptographic audit record.
• CG CoreGuard ships with regulatory policy packs (ECOA, FCRA, HIPAA, SR 11-7). Guardrails AI has no regulatory rule libraries — all validation logic must be written by your team.
• CG CoreGuard is a hosted REST API with an enterprise SLA. Guardrails AI is a Python library requiring installation, dependency management, and self-hosting for production scale.
• GA Guardrails AI is open source with a large community. If your use case is LLM output structure validation — not regulatory compliance — it may be the right tool.

LlamaGuard is a fine-tuned Llama model trained on Meta's harm taxonomy for content safety classification. It accepts a prompt or response and outputs a safety label with a probability score. It is designed to detect harmful content categories such as violence, hate speech, and self-harm.

LlamaGuard has no concept of regulatory compliance. It cannot tell you whether an AI-generated lending decision violates the Equal Credit Opportunity Act. It cannot produce an audit record that maps a decision to a specific regulatory rule. Its probabilistic outputs vary with model version and inference parameters — making them unsuitable for governance frameworks that require reproducibility.

• CG CoreGuard uses deterministic rule evaluation. The same request always returns the same decision. LlamaGuard's neural outputs are probabilistic and can vary between runs.
• CG CoreGuard decisions are mapped to named policy rules with a signed certificate. LlamaGuard returns a score — not a traceable governance record — which does not satisfy examiner requests for decision lineage.
• CG CoreGuard requires no GPU infrastructure and runs in under 1ms as a hosted API. LlamaGuard requires self-hosting a large language model — adding latency, infrastructure cost, and operational complexity.
• LG LlamaGuard is openly licensed and can be fine-tuned for custom harm taxonomies. If content safety classification — not regulatory compliance — is the requirement, it is a strong candidate.

Lakera Guard is a commercial API focused specifically on prompt injection detection — identifying adversarial inputs designed to bypass an AI system's instructions. It is effective at detecting jailbreak attempts, indirect prompt injection, and data leakage via prompt manipulation.

Prompt injection protection is one narrow slice of the AI governance problem. Lakera Guard does not evaluate whether an AI action complies with ECOA, HIPAA, or SR 11-7. It does not produce signed audit certificates. It does not provide an ALLOW/BLOCK/MODIFY governance framework. Organizations in regulated industries typically need both prompt injection protection and compliance governance — two separate tools, or a platform that combines them.

• CG CoreGuard covers the full governance decision lifecycle — not just input sanitization. Policy violations, risk assessment, and signed certificates are produced for every evaluated action.
• CG CoreGuard regulatory policy packs enforce compliance rules (ECOA fair lending, HIPAA PHI handling, SR 11-7 model risk) that Lakera Guard does not address at all.
• LK Lakera Guard is a specialized, mature prompt injection detection product. For adversarial prompt threat modeling specifically, it has deep investment in attack taxonomy coverage.

OpenAI's Moderation API classifies text across harm categories — hate, self-harm, sexual content, violence, and related subtypes. It is free to use and tightly integrated into the OpenAI platform. For consumer-facing applications using OpenAI models, it provides a reasonable first layer of content safety screening.

For institutional AI governance, the Moderation API has fundamental gaps. It is a content safety tool, not a compliance engine. It cannot evaluate whether a credit decision violates ECOA. It produces no signed audit record. It is tied to OpenAI's infrastructure with no contractual governance SLA. Its categories — harm, hate, self-harm — do not map to the regulatory frameworks that financial, healthcare, or government AI deployments must satisfy.

• CG CoreGuard decision certificates provide an auditor-verifiable record with policy rule mapping, risk score, request hash, and HMAC signature. The Moderation API provides a JSON category score — not an audit artifact.
• CG CoreGuard is model-agnostic. It governs actions from any LLM — Anthropic, OpenAI, Google, Mistral, or open-source models. The Moderation API only covers content generated by or submitted to OpenAI services.
• CG CoreGuard policy packs map directly to regulatory frameworks (ECOA § 202, HIPAA 45 CFR 164, SR 11-7 MRM). OpenAI Moderation categories (hate, sexual, violence) have no regulatory mapping.
• OA The Moderation API is free, zero-latency for OpenAI customers, and trivially integrated. For basic content safety on consumer chat applications — not institutional compliance — it is a practical default.