Comparison

Envoy AI Gateway vs TensorZero

No clear leader: Envoy AI Gateway (59.3) and TensorZero (56.2) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Envoy AI Gateway59
TensorZero56
Score
vioscaleAI score
Envoy AI Gateway59 / 100medium · 54%
TensorZero56 / 100low · 48%
Pricing
Free tier
Envoy AI Gateway✓
TensorZero✓
Model
Envoy AI Gatewayopen_source
TensorZeroopen_source
Price level
Envoy AI Gatewayfree
TensorZerofree
Integrations
Count
Envoy AI Gateway16
TensorZero4
Adoption
Dependent repos
Envoy AI Gateway0
TensorZero0
Github stars
Envoy AI Gateway2,229
TensorZero11,707
Activity
Commits last 30d
Envoy AI Gateway68
TensorZero–
Release
Cadence days
Envoy AI Gateway6
TensorZero6
History
Envoy AI Gateway20 items
TensorZero20 items
License
Spdx
Envoy AI GatewayApache-2.0
TensorZeroApache-2.0
Language
Primary
Envoy AI GatewayGo
TensorZeroRust
Content
Faq
Envoy AI Gateway6 items
TensorZero6 items

Capabilities

Feature-by-feature on the axes that matter for llm gateways. “-” means undocumented, not absent.

Capabilities
Openai compatible API
Envoy AI Gateway✓
TensorZero✓
Automatic failover
Envoy AI Gateway✓
TensorZero✓
Routing strategy
Envoy AI GatewayCustom
TensorZero-
Caching
Envoy AI GatewaySemantic
TensorZero-
Virtual key management
Envoy AI Gateway✓
TensorZero✓
Budget spend controls
Envoy AI Gateway✓
TensorZero-
Rate limiting
Envoy AI Gateway✓
TensorZero-
Guardrails moderation
Envoy AI Gateway-
TensorZero-
Request cost observability
Envoy AI Gateway✓
TensorZero✓
Streaming support
Envoy AI Gateway✓
TensorZero-
Deployment model
Envoy AI GatewaySelf hosted
TensorZeroSelf hosted
Open source
Envoy AI Gateway✓
TensorZero✓
Pricing model
Envoy AI GatewayOpen source self host
TensorZeroOpen source self host

What each one is

The product in its own terms, so the numbers below have context.

Envoy AI Gateway

An open-source gateway built on Envoy that centralizes AI traffic management by forwarding OpenAI-compatible requests to various LLM providers with automatic failover, token-based rate limiting, and Kubernetes-native deployment.

Independently observed

TensorZero

A self-hosted platform that combines deployment, monitoring, evaluation, and optimization for language model applications. It enables teams to manage multiple model providers through a single interface, measure performance across different configurations, and automatically improve routing strategies and prompts.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Envoy AI Gateway

Open sourceFree tier

Open-source. Commercial managed hosting and enterprise self-hosted options available.

as of verify ↗

TensorZero

Open source
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Envoy AI Gateway✗
TensorZero✓
CLI
Envoy AI Gateway✓
TensorZero✗
Deployment
Cloud / SaaS
Envoy AI Gateway✓
TensorZero✗
Self-hosted
Envoy AI Gateway✓
TensorZero✓
On-premise
Envoy AI Gateway✓
TensorZero✗
Hybrid
Envoy AI Gateway✓
TensorZero✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (1)
  • OpenAI

Envoy AI Gateway

28 total - 27 not shared
  • AWS Bedrock
  • Azure OpenAI
  • Google Vertex AI
  • Google Gemini
  • Anthropic
  • Groq
  • Together AI
  • Mistral
  • Cohere
  • DeepInfra
  • DeepSeek
  • Hunyuan
  • Tencent LLM Knowledge Engine
  • SambaNova
  • Grok
  • OIDC
  • cert-manager
  • GCP Vertex AI
  • Gemini
  • vLLM
  • MCP
  • Kubernetes
  • AWS STS
  • Entra ID
  • +3 more
Independently observed

TensorZero

4 total - 3 not shared
  • Ollama
  • Slack
  • Teams
Independently observed
Still deciding?

Envoy AI Gateway or TensorZero: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.