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What is LowRouter?

LowRouter functions as an AI gateway in Europe, tailored for agents and applications, providing a single API key and consolidated euro billing for language models from both European and international sources. Users have the ability to create routing rules specific to each API key, enabling choices such as exclusively utilizing EU-sovereign providers, prioritizing routes with lower carbon emissions, or selecting the most economical options, or even combining these preferences. Generated responses include information about the provider and its location, as well as an estimated carbon footprint when the model's data permits such disclosures. Coding agents, including OpenCode, Claude Code, and Cline, can leverage LowRouter as a custom provider, while applications built with LangChain or the OpenAI SDK can seamlessly incorporate it. With the integration of aliases, users can switch between models or providers effortlessly without altering their core code, and the automatic routing feature guarantees that eligible requests are rerouted to alternative providers if a route fails. The public model catalogue is available for users to browse, searchable by criteria such as sovereignty and carbon intensity, making it easier to choose appropriate options. Providers set the token billing rates with no additional per-token markup; however, fees apply to credit top-ups, and there is no subscription requirement for the service. Managed by Carbonifer SAS, located in Nantes, France, LowRouter is dedicated to promoting sustainability while ensuring user-friendly access. Furthermore, the platform is continuously adapting to address the evolving demands of its users in a fast-paced technological environment, reflecting a commitment to innovation and responsiveness.

What is FastRouter?

FastRouter functions as a versatile API gateway, enabling AI applications to connect with a diverse array of large language, image, and audio models, including notable versions like GPT-5, Claude 4 Opus, Gemini 2.5 Pro, and Grok 4, all through a user-friendly OpenAI-compatible endpoint. Its intelligent automatic routing system evaluates critical factors such as cost, latency, and output quality to select the most suitable model for each request, thereby ensuring top-tier performance. Moreover, FastRouter is engineered to support substantial workloads without enforcing query per second limits, which enhances high availability through instantaneous failover capabilities among various model providers. The platform also integrates comprehensive cost management and governance features, enabling users to set budgets, implement rate limits, and assign model permissions for every API key or project. In addition, it offers real-time analytics that provide valuable insights into token usage, request frequency, and expenditure trends. Furthermore, the integration of FastRouter is exceptionally simple; users need only to swap their OpenAI base URL with FastRouter’s endpoint while customizing their settings within the intuitive dashboard, allowing the routing, optimization, and failover functionalities to function effortlessly in the background. This combination of user-friendly design and powerful capabilities makes FastRouter an essential resource for developers aiming to enhance the efficiency of their AI-driven applications, ultimately positioning it as a key player in the evolving landscape of AI technology.

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Media

Integrations Supported

LlamaIndex
OpenCode

Integrations Supported

GPT-5
GPT-5.2 Instant
GPT-5.4 nano
GPT-5.6 Terra
GPT-6.2 Astra
GPT‑5.4 Thinking
Gemini 2.5 Pro
Gemini 3 Deep Think
Gemini 3 Pro
Gemini 3.1 Flash-Lite
Gemini 3.1 Pro
Grok 4
Grok 4.1
Grok 4.1 Fast
Grok 4.20
Holo4
Mistral AI
OpenAI Bel

API Availability

Has API

API Availability

Has API

Pricing Information

€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 Trial Offered?

Pricing Information

Pricing not provided
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Carbonifer

Date Founded

2023

Company Location

France

Company Website

lowrouter.ai

Company Facts

Organization Name

FastRouter

Date Founded

2025

Company Location

United States

Company Website

fastrouter.ai/

Categories and Features

LLM Routers

Not specified

Categories and Features

AI Gateways

Not specified

API Gateways

Not specified

LLM Routers

Not specified

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