Best AI Gateway Tools

LiteLLM is a self-hosted AI gateway that presents one OpenAI-compatible API across more than 100 model providers. The homepage separately claims access to over 1,800 models. Platform teams can issue virtual keys, organize users and teams, enforce budgets and rate limits, route requests, configure fallbacks and retries, log requests, export Prometheus metrics, and place models, agents, and MCP servers behind one access layer. Comparable options include [OpenRouter](/tools/openrouter), [Portkey AI

Key Features:

• •Unified OpenAI-compatible API for 100+ LLM providers, documented at https://docs.litellm.ai/
• •Intelligent load balancing across providers and regions
• •Automatic failover with exponential backoff retries

Portkey is an AI gateway for routing, observing, securing, and governing production traffic across model providers, agents, and MCP tools. It centralizes fallbacks, guardrails, prompt operations, cost tracking, and access policy for engineering teams.

Key Features:

• •OpenAI-compatible AI gateway
• •Multi-provider routing across 1,600+ models
• •Automatic fallbacks, load balancing, retries, and request timeouts