LiteLLM
Unified gateway for 100+ LLMs with spend tracking
LiteLLM is a Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI format, with cost tracking, guardrails, loadbalancing and logging. Supports Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM.
Azure OpenAI Service is Microsoft's fully managed, proprietary way to access OpenAI's models (GPT, embeddings, DALL-E, Whisper, and more) with enterprise security and compliance layered on top. It's closed source and ties you to Azure's infrastructure, pricing, and provisioning model.
LiteLLM is an open-source alternative for teams that want a self-hosted gateway to call OpenAI, Azure OpenAI, and 100+ other LLM providers through one unified interface, rather than being locked into a single cloud vendor's API layer.
FAQ
Is there a free, open-source alternative to Azure OpenAI?
Yes. LiteLLM is open source and free to self-host as a gateway layer, though you'll still need API access to whichever underlying model providers you choose to call through it.
What's the best open-source alternative to Azure OpenAI?
LiteLLM is the best open-source option if your goal is a flexible, self-hosted routing layer across multiple LLM providers rather than a single managed cloud service.
What are the top open-source alternatives to Azure OpenAI?
Browse all open-source alternatives to Azure OpenAI above, or explore the full Developer Tools category for more options.