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  1. Home
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  3. Best LLM API Providers

Best LLM API Providers

Compare the top LLM API providers including OpenAI, Anthropic, Google, and more.

Ollama logo
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.

Frequently Asked Questions

What are the best llm api providers?

tokens& tracks llm api providers with product fit, docs, pricing, alternatives, open source status, public proof, and adoption evidence where available.

How do we rank llm api providers?

Catalog ordering uses available stars, reviews, funding, featured status, saves, adoption-event counts, and product metadata. Those event counts do not establish verified adoption or retention. AgentRank is a separate ranking with its own published methodology. Sponsored suggestions, when present, are labeled.

For adoption evidence, see AgentRank rankings and the published methodology.

186,297
Open source
vLLM logo
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.

96,352
Open source
llama.cpp logo
llama.cpp

LLM Providers· github.com

Open source

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

133,590
Open source
LiteLLM logo
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.

62,590
Open source
SGLang logo
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.

38,479
Open source
LMCache logo
LMCache

LLM Providers· lmcache.ai

Open source

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

12,292
Open source
KServe logo
KServe

LLM Providers· kserve.github.io

Open source

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

6,192
Open source
LM Studio logo
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.

1,807
Open source
Envoy AI Gateway logo
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.

2,353
Open source
Replicate logo
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.

597
API available
Aion 3.0 on OpenRouter logo
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.

API available