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TensorZero

Free

Open-source LLM gateway for routing, observability, and optimization in Rust.

Open SourceCloudSelf-hostedRust SDKPython SDK

Tool Info

Categories
Serving · Infrastructure
Developer
TensorZero
License
Open Source
Official Website
tensorzero.com
Repository
tensorzero/tensorzero
Official Docs

Overview

TensorZero is an open LLM gateway built in Rust for high-throughput routing.

It provides observability, fallbacks, and optimization out of the box.

Alternative to LiteLLM for performance-critical gateways.

Features

  • Multi-model routing
  • Built-in observability
  • Rust performance
  • Prompt templates

Pricing

Free tier available
Free (open source)

Pros

  • High performance
  • Open source
  • Production gateway patterns

Best For

LLM API gatewayModel routing and fallbacksInference observability

When NOT to Use

  • Newer project
  • Rust ops knowledge helpful

Typical Users

Platform engineersAI infrastructure teams

Related Tools

Ollama
Local model runner with simple command and HTTP interface.
vLLM
High-throughput LLM inference engine with PagedAttention.
LM Studio
Desktop app for running local LLMs with a chat interface.

Alternatives

LiteLLM
LiteLLM is Python-first with 100+ providers; TensorZero is a Rust gateway optimized for latency and observability.
vLLM
High-throughput LLM inference engine with PagedAttention.

Related Architecture Guides

AI System Architecture

Tags

#serving#gateway#routing

Related Guides

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