FastRouter

FastRouter is an early-stage AI gateway that routes each request across multiple large language models through a single OpenAI-compatible endpoint, adding failover, observability and governance controls, with documented integrations for LangGraph, CrewAI, AutoGen, Agno, Pydantic AI and the OpenAI Agents SDK. The product's own channels disagree on scale — its Product Hunt listing says 200-plus models, its documentation says 160-plus across 20-plus providers, and its GitHub page says 100-plus — covering providers including OpenAI, Anthropic, Google, Meta, xAI and Cohere. FastRouter is priced usage-based on tokens routed through the gateway with underlying model costs passed through, and competes with incumbent aggregator OpenRouter and enterprise gateway Portkey on maturity and price rather than concept.

FastRouter FastRouter is a unified AI gateway that routes each request to a suitable model through one OpenAI-compatible endpoint, with failover and governance. Overview FastRouter FastRouter is an AI https://tooldirectory.ai/glossary/ai gateway and control plane for teams building on more than one model. FastRouter exposes a single OpenAI-compatible endpoint, routes each request to a model chosen for cost, latency https://tooldirectory.ai/glossary/latency or quality, and adds the operational layer around it: failover when a provider degrades, observability over what was sent where, and governance controls for teams. It documents integrations with the agent https://tooldirectory.ai/glossary/agent frameworks people actually use, including LangGraph, CrewAI, AutoGen, Agno, Pydantic AI and the OpenAI Agents SDK. Production credibility: FastRouter publishes developer documentation at docs.fastrouter.ai and maintains a GitHub organisation, and its listing describes coverage across providers including OpenAI, Anthropic, Google, Meta, xAI and Cohere. It is an early product and its own surfaces disagree on scale — the Product Hunt listing says 200-plus models, the documentation says 160-plus across 20-plus providers, and the GitHub page says 100-plus — so treat any single figure as approximate and check the current site before relying on it. Key Features - One OpenAI-compatible endpoint across many providers - Routing by cost, latency or quality rather than a fixed model - Failover when a provider degrades or errors - Observability over requests, spend and model selection - Governance controls for team and enterprise use - Documented integrations with LangGraph, CrewAI, AutoGen and the OpenAI Agents SDK Ideal Use Case Teams whose costs are dominated by inference https://tooldirectory.ai/glossary/inference and who would rather not rewrite integrations each time a cheaper or better model appears. The agent-framework integrations make it a practical drop-in for an existing agent stack, and the failover matters most for production traffic that cannot wait out a provider incident. How FastRouter differentiates OpenRouter is the incumbent aggregator and Portkey the enterprise-flavoured gateway; Not Diamond focuses on picking the right model per prompt. FastRouter combines routing with the control-plane features, which is the same ground Portkey occupies — so the comparison comes down to maturity and price rather than concept. It is the newest option here, and the inconsistent model counts across its own channels are a fair signal of its stage. FAQ Q: What is FastRouter? A: FastRouter is a unified AI gateway. It routes requests across many large language models through one OpenAI-compatible endpoint, with failover, observability and governance. Q: How many models does FastRouter support? A: Its own surfaces give different figures — 100-plus, 160-plus and 200-plus across 20-plus providers — so check the current site. Coverage includes OpenAI, Anthropic, Google, Meta, xAI and Cohere. Q: Does FastRouter work with agent frameworks? A: Yes. Its documentation lists LangGraph, CrewAI, AutoGen, Agno, Pydantic AI and the OpenAI Agents SDK among supported frameworks. Q: How is FastRouter priced? A: Usage-based on the tokens https://tooldirectory.ai/glossary/tokens routed through the gateway, with the underlying model costs passed through. Q: How does FastRouter compare to OpenRouter? A: Both aggregate many models behind one endpoint. FastRouter emphasises the control plane around routing — failover, observability and governance — and is a considerably newer product. tl;dr FastRouter is an AI gateway routing requests across many models through one OpenAI-compatible endpoint, with failover, observability and governance, plus documented agent-framework integrations. Early-stage: its own channels quote different model counts. Key Features Why Use FastRouter User Reviews Similar Tools AI InfrastructureOpenRouterUnified API and marketplace for the best LLMs at the best prices for any prompt.Freemium★ 4.84♥ 360 https://tooldirectory.ai/tools/open-router LLM Gateways & ServingPortkeyPortkey is a unified AI gateway and LLMOps control plane that routes, observes, governs, and secures LLM traffic across 1,600+ models via one API.Freemium★ 4.84♥ 285 https://tooldirectory.ai/tools/portkey LLM Gateways & ServingNot DiamondNot Diamond is a model routing layer that selects the right LLM for each query to raise quality and cut costs.Paid★ 4.84♥ 245 https://tooldirectory.ai/tools/not-diamond Developer ToolsTOGETHERCloud service for developers to build with open-source AI, offering APIs, distributed training systems, and leading open-source models.Paid★ 4.93♥ 441 https://tooldirectory.ai/tools/together-ai-open-source-development-platform Developer ToolsHeliconeHelicone: Open-source monitoring for generative AI applications.Paid★ 4.75♥ 225 https://tooldirectory.ai/tools/helicone-ai-monitoring