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About

FastRouter is a unified API gateway that enables AI applications to access many large language, image, and audio models (like GPT-5, Claude 4 Opus, Gemini 2.5 Pro, Grok 4, etc.) through a single OpenAI-compatible endpoint. It features automatic routing, which dynamically picks the optimal model per request based on factors like cost, latency, and output quality. It supports massive scale (no imposed QPS limits) and ensures high availability via instant failover across model providers. FastRouter also includes cost control and governance tools to set budgets, rate limits, and model permissions per API key or project, and it delivers real-time analytics on token usage, request counts, and spending trends. The integration process is minimal; you simply swap your OpenAI base URL to FastRouter’s endpoint and configure preferences in the dashboard; the routing, optimization, and failover functions then run transparently.

About

TensorZero is an open source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation. It creates a feedback loop for optimizing LLM applications, turning production metrics and human feedback into smarter, faster, and cheaper models and agents. The gateway lets teams integrate once and access every major LLM provider through a single unified API, including API and self-hosted models, with support for tool use, structured outputs, batch inference, embeddings, multimodal inputs, caching, routing, retries, fallbacks, load balancing, granular timeouts, usage tracking, custom rate limits, and provider-key protection. Built for performance in Rust, TensorZero is designed for extreme throughput and low-latency production workloads while still letting teams adopt only the components they need. Its observability layer stores inferences and feedback in the user’s own database, available programmatically or through the open source UI.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and AI engineering teams wanting a tool providing access, optimized performance, and cost governance under a single API

Audience

LLM developers and engineering teams that need to manage gateways, observability, evaluations, optimization, and experimentation for AI applications

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Supported

Pricing

Free
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

FastRouter
Founded: 2025
United States
fastrouter.ai/

Company Information

TensorZero
Founded: 2023
United States
github.com/tensorzero/tensorzero

Alternatives

Alternatives

Categories

AI Gateways Supported
API Gateways Supported
LLM Routers Supported

Categories

AI Gateways Supported
LLM Routers Supported

Integrations

GPT-5 Supported
GPT-5.1 Supported
GPT-5.1 Instant Supported
GPT-5.1 Thinking Supported
GPT-5.2 Supported
GPT-5.2 Instant Supported
GPT-5.2 Pro Supported
GPT-5.4 Supported
GPT-5.5 Supported
GPT-5.6 Luna Supported
GPT‑5.4 Thinking Supported
Gemini 2.5 Pro Supported
Gemini 3.1 Flash-Lite Supported
Grok 4.1 Fast Supported
Grok 4.20 Supported
Grok 4.3 Supported
Holo4 Supported
Mistral AI Supported
OpenAI Supported

Integrations

GPT-5 Not Supported
GPT-5.1 Not Supported
GPT-5.1 Instant Not Supported
GPT-5.1 Thinking Not Supported
GPT-5.2 Not Supported
GPT-5.2 Instant Not Supported
GPT-5.2 Pro Not Supported
GPT-5.4 Not Supported
GPT-5.5 Not Supported
GPT-5.6 Luna Not Supported
GPT‑5.4 Thinking Not Supported
Gemini 2.5 Pro Not Supported
Gemini 3.1 Flash-Lite Not Supported
Grok 4.1 Fast Not Supported
Grok 4.20 Not Supported
Grok 4.3 Not Supported
Holo4 Not Supported
Mistral AI Not Supported
OpenAI Not Supported
Claim FastRouter and update features and information
Claim FastRouter and update features and information
Claim TensorZero and update features and information
Claim TensorZero and update features and information