LowRouter

LowRouter

Carbonifer
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+

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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

LowRouter is a European AI gateway for agents and apps, providing one API key and one bill in euros for language models from European and international providers. Set routing rules per API key, including EU-sovereign providers only, lower-carbon routing, lower-cost routing, or a combination. Responses report the provider and region, with an estimated carbon figure when model data supports it. Coding agents such as OpenCode, Claude Code, and Cline can use LowRouter as a custom provider. Apps built with LangChain or the OpenAI SDK can also connect. Aliases let you switch models or providers without changing code, and automatic routing can send eligible requests to another provider when a route fails. The public model catalogue can be searched by sovereignty and carbon intensity. Tokens are billed at provider prices without a per-token markup; credit top-ups carry a fee, and there is no subscription. LowRouter is operated by Carbonifer SAS in Nantes, France.

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

Developers and companies that run or build AI agents and need EU-sovereign routing, per-request carbon estimates, and one bill in euros.

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

No images available

Pricing

No information available.
Free Version Not Supported
Free Trial Supported

Pricing

€5/top-up
Pay as you go with a €5 minimum credit top-up. Tokens are billed at provider prices without a per-token markup. A 5.5%–8.5% fee plus €0.30 applies to each top-up, depending on billing situation; applicable VAT is added at checkout. Credits expire 12 months after purchase, and there is no subscription.
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

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

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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

Carbonifer
Founded: 2023
France
lowrouter.ai

Alternatives

Alternatives

Categories

AI Gateways Supported
API Gateways Supported
LLM Routers Supported

Categories

LLM Routers Supported

Integrations

Claude Code Not Supported
Claude Opus 4 Supported
Cline Not Supported
GPT-5.1 Supported
GPT-5.2 Supported
GPT-5.2 Thinking Supported
GPT-5.3 Instant Supported
GPT-5.4 Pro Supported
GPT-5.4 mini Supported
GPT-5.4 nano Supported
GPT-5.6 Sol Supported
GPT-5.6 Terra Supported
GPT-6.2 Astra Supported
Gemini 3 Deep Think Supported
Gemini 3 Flash Supported
Grok 4.1 Supported
Grok 4.20 Supported
LangChain Not Supported
OpenCode Not Supported

Integrations

Claude Code Supported
Claude Opus 4 Not Supported
Cline Supported
GPT-5.1 Not Supported
GPT-5.2 Not Supported
GPT-5.2 Thinking Not Supported
GPT-5.3 Instant Not Supported
GPT-5.4 Pro Not Supported
GPT-5.4 mini Not Supported
GPT-5.4 nano Not Supported
GPT-5.6 Sol Not Supported
GPT-5.6 Terra Not Supported
GPT-6.2 Astra Not Supported
Gemini 3 Deep Think Not Supported
Gemini 3 Flash Not Supported
Grok 4.1 Not Supported
Grok 4.20 Not Supported
LangChain Supported
OpenCode Supported
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