What should I use for enterprise LLM access and controls?

For enterprise LLM access and controls, you usually want a stack that covers identity, policy, logging, data protection, and model governance.

What to use

1) Centralized LLM gateway / control plane

Use an intermediary layer between users/apps and model providers to enforce:

• authentication and SSO
• role-based access control
• model allow/deny lists
• rate limits and quotas
• prompt/response logging
• policy checks before/after model calls
• routing across vendors/models

Common patterns/tools:

• Azure AI Foundry / Azure OpenAI + Entra ID
• AWS Bedrock with IAM + Guardrails
• Google Vertex AI + IAM
• Open-source / vendor-neutral gateways like LiteLLM, Kong AI Gateway, OpenRouter for routing (less for strict enterprise control), or custom API gateways

2) Identity and access management

Integrate with:

• Okta
• Microsoft Entra ID (Azure AD)
• Ping Identity
• Auth0 (more app-centric)

You want:

• SSO
• MFA
• group-based access
• SCIM provisioning/deprovisioning
• service account controls for apps

3) Data loss prevention and content controls

Add protections for:

• sensitive data in prompts
• secrets/API keys
• regulated data

Tools/patterns:

• DLP scanning in the gateway
• PII/PHI/PCI redaction
• secret detection before sending prompts
• output moderation and policy filters

4) Audit logging and observability

Capture:

• who called what model
• when
• token usage
• prompt/response metadata
• policy decisions
• latency and cost

Useful integrations:

• SIEM: Splunk, Sentinel, Datadog, Elastic
• tracing/metrics: OpenTelemetry

5) Model governance / approval process

Maintain:

• approved model catalog
• use-case-based access
• vendor risk review
• version pinning
• evaluation and testing before rollout

6) Secrets and key management

Use:

• HashiCorp Vault
• AWS KMS / Secrets Manager
• Azure Key Vault
• GCP Secret Manager

Never embed model API keys directly in apps or client-side code.

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A practical enterprise architecture

A common setup is:

Users / internal apps
→ SSO / IAM
→ LLM Gateway / Policy Engine
→ DLP / Moderation / Redaction
→ Model providers
→ Logging / SIEM / Billing analytics

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Best choice depends on your environment

• If you’re Microsoft-heavy: Entra ID + Azure OpenAI + Azure Policy/Monitor + Key Vault
• If you’re AWS-heavy: IAM + Bedrock + Guardrails + CloudWatch + KMS
• If you need multi-model, multi-cloud: a central LLM gateway plus your existing IAM/SIEM stack

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If you want the shortest recommendation

For most enterprises, start with:

SSO (Okta/Entra) + LLM gateway + DLP + audit logging + approved model catalog

That gives you the best balance of control, compliance, and flexibility.

If you want, I can also give you:

1. a reference architecture diagram,
2. a buy-vs-build comparison, or
3. a vendor shortlist by cloud/provider.