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Envoy AI Gateway

Unified gateway for secure, scalable generative AI traffic

Envoy AI Gateway routes, authenticates, and rate‑limits traffic to multiple LLM providers, offering a two‑tier architecture for centralized control and fine‑grained model access.

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Overview

Overview

Envoy AI Gateway provides a cloud‑native, Envoy‑based solution for routing client requests to a wide range of generative AI services. By handling authentication, top‑level routing, and global rate limiting at a centralized Tier One gateway, it gives operators a single control point for policy enforcement across providers such as OpenAI, Azure OpenAI, Google Gemini, Anthropic, and many others.

Architecture

A second Tier Two gateway sits closer to self‑hosted model clusters, offering fine‑grained access control and an endpoint picker that can direct inference traffic to the most suitable model instance. The two‑tier pattern lets organizations combine SaaS LLM APIs with on‑premise deployments while maintaining consistent security and observability. Deployment follows standard Envoy Gateway practices on Kubernetes, and the project includes quick‑start guides, documentation, and an active CNCF‑aligned community.

Highlights

Two‑tier gateway pattern separating entry‑point and model‑specific routing
Built‑in authentication, global rate limiting, and top‑level routing
Supports 20+ LLM providers out of the box
Endpoint picker for inference optimization on self‑hosted clusters

Pros

  • Works with any Envoy Gateway deployment
  • Extensive provider support reduces integration effort
  • Fine‑grained control via Tier Two gateway
  • Community‑driven CNCF project with active Slack channel

Considerations

  • Requires familiarity with Envoy configuration
  • Complexity of two‑tier setup may be overkill for simple use‑cases
  • Limited to Kubernetes environments for self‑hosted models
  • Performance depends on underlying Envoy deployment

Managed products teams compare with

When teams consider Envoy AI Gateway, these hosted platforms usually appear on the same shortlist.

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Eden AI

Unified API aggregator for AI services across providers

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OpenRouter

One API for 400+ AI models with smart routing and unified billing/BYOK

Vercel AI Gateway logo

Vercel AI Gateway

Unified AI gateway for multi-provider routing, caching, rate limits, and observability

Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.

Fit guide

Great for

  • Enterprises needing unified access control across multiple LLM services
  • Teams deploying self‑hosted model clusters alongside SaaS providers
  • Developers seeking standardized authentication and rate limiting for AI APIs
  • Organizations adopting cloud‑native, CNCF‑aligned infrastructure

Not ideal when

  • Small projects with a single LLM provider and minimal routing
  • Teams without Envoy or Kubernetes expertise
  • Use‑cases requiring out‑of‑the‑box UI dashboards
  • Scenarios where latency overhead of an extra proxy layer is unacceptable

How teams use it

Enterprise AI platform consolidating OpenAI, Azure, and internal models

Provides a single entry point with unified auth, rate limits, and routing, simplifying policy enforcement.

Multi‑tenant SaaS offering LLM‑powered features

Isolates tenant traffic via Tier Two gateways, enabling per‑tenant model selection and usage quotas.

Edge deployment routing requests to on‑premise LLM cluster

Uses Tier Two gateway to pick optimal inference endpoints, reducing latency and cost.

Rapid prototyping across diverse AI providers

Allows developers to switch providers without code changes, leveraging the same gateway configuration.

Tech snapshot

Go91%
MDX7%
CSS1%
TypeScript1%
Makefile1%
Smarty1%

Tags

aikubernetesinferencellmai-gatewaycncfapi-gateway

Frequently asked questions

What languages or frameworks are required to run Envoy AI Gateway?

The gateway runs on Envoy Gateway and is configured via YAML/Envoy resources; the control plane is written in Go but any language can interact through standard HTTP/HTTPS.

Does Envoy AI Gateway provide built‑in authentication mechanisms?

Yes, the Tier One gateway supports authentication plugins (e.g., JWT, OAuth) that can be configured to validate incoming client requests.

Can I add a new LLM provider not listed in the documentation?

Custom providers can be integrated by defining a new upstream cluster and routing rules, leveraging Envoy’s extensible filter architecture.

Is there a managed SaaS version of Envoy AI Gateway?

Currently the project is self‑hosted; no official managed service is offered.

How does the endpoint picker improve inference performance?

It selects the most appropriate model endpoint based on routing criteria such as latency, version, or load, allowing fine‑tuned optimization.

Project at a glance

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LicenseApache-2.0
Repo age1 year old
Last commit17 hours ago
Primary languageGo

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