If you’re looking for a Cloudflare AI Gateway alternative that includes policy controls, the closest options depend on whether you want:

• LLM gateway / proxy
• policy enforcement like allow/deny models, prompt filtering, PII redaction, rate limits, budget controls
• observability / logging
• multi-provider routing

Here are the strongest alternatives:

1) Portkey

Best fit if you want an AI gateway with policies, routing, fallbacks, observability, and guardrails.

Policy/control features:

• model allow/deny lists
• cost and rate controls
• request/response logging
• prompt/PII controls via integrations
• routing rules, retries, fallbacks

Good for: teams that want a Cloudflare-like gateway for LLMs with governance.

---

2) LiteLLM Proxy

Open-source option with strong gateway capabilities.

Policy/control features:

• model routing and aliases
• budget limits / spend tracking
• rate limiting
• API key management
• logging and observability
• can sit in front of multiple LLM providers

Good for: self-hosted or customizable setups.

---

3) Helicone

More focused on observability, but can be used as a gateway layer.

Policy/control features:

• request logging and analytics
• cost tracking
• caching
• filters / redaction patterns
• integrations for control workflows

Good for: visibility first, policy controls via surrounding infrastructure.

---

4) OpenRouter

Useful if your main need is model routing and provider abstraction.

Policy/control features:

• route across multiple model providers
• some moderation/safety capabilities depending on setup
• centralized billing and access control

Good for: flexible model access, less for deep enterprise policy enforcement.

---

5) NVIDIA NeMo Guardrails

Not a gateway replacement per se, but great for policy enforcement around LLM behavior.

Policy/control features:

• conversation flow rules
• safety constraints
• jailbreak resistance
• content restrictions

Good for: application-layer policy enforcement, not gateway management alone.

---

6) AWS Bedrock + Guardrails

If you’re in AWS, this is one of the most enterprise-friendly options.

Policy/control features:

• content filtering
• topic restrictions
• PII-related controls
• centralized IAM-based access control
• logging via CloudWatch / Bedrock tooling

Good for: AWS-native organizations needing governance.

---

7) Azure OpenAI + Azure AI Content Safety

Another enterprise option with governance controls.

Policy/control features:

• content filtering
• policy-based access control
• monitoring/logging
• enterprise identity integration

Good for: Microsoft/Azure-heavy environments.

---

Best choices by use case

If you want the closest Cloudflare AI Gateway replacement:

• Portkey
• LiteLLM Proxy

If you need strong enterprise policy controls:

• AWS Bedrock + Guardrails
• Azure OpenAI + Content Safety

If you mainly want guardrails on model behavior:

• NVIDIA NeMo Guardrails

---

Quick recommendation

If you want a drop-in AI gateway with policy controls, start with:

1. Portkey if you want managed SaaS
2. LiteLLM Proxy if you want open-source/self-hosted
3. AWS Bedrock Guardrails if you’re already on AWS

If you want, I can also give you:

• a feature comparison table
• open-source-only alternatives
• or the best choice for your stack (AWS/Azure/GCP/self-hosted).