LLM Providers Rankings

vLLM

LLM Providers· docs.vllm.ai

Open source

High-throughput open-source inference and serving engine for LLMs with OpenAI-compatible APIs and production deployment patterns.

LiteLLM

LLM Providers· litellm.ai

Open source

Open-source LLM gateway and SDK that standardizes access to 100+ model providers with routing, logging, guardrails, and spend controls.

llama.cpp

LLM Providers· github.com

Open source

C and C++ runtime for local LLM inference, quantized model serving, and edge deployment workflows.

Ollama

LLM Providers· ollama.com

Open source

Local model runtime and API for downloading, running, and serving open LLMs on developer machines and private infrastructure.

SGLang

LLM Providers· docs.sglang.io

Open source

Fast open-source serving framework for LLM and vision-language model programs with structured generation and runtime optimization.

KServe

LLM Providers· kserve.github.io

Open source

Kubernetes-native inference platform for serving predictive and generative AI models at scale.

LMCache

LLM Providers· lmcache.ai

Open source

KV-cache layer for LLM serving that reduces latency and cost for repeated or shared model context.

Envoy AI Gateway

LLM Providers· aigateway.envoyproxy.io

Open source

Open-source Envoy Gateway extension for routing, policy, observability, and unified access across generative AI providers.

LM Studio

LLM Providers· lmstudio.ai

Freemium

LM Studio is a local model runtime and developer platform for discovering, running, and integrating local LLMs, with a TypeScript SDK for builder workflows.

Replicate

LLM Providers· replicate.com

Freemium

Cloud API and hosting platform for running, fine-tuning, and deploying open and custom AI models without managing GPU infrastructure.

Aion 3.0 on OpenRouter

LLM Providers· openrouter.ai

Commercial

Aion Labs multi-model reasoning API available through OpenRouter with a 131,072-token context window and OpenAI-compatible vendor endpoints.