LiteLLM Alternatives
4 alternatives to LiteLLM — free and paid AI coding tools covering similar jobs, with pricing and standout strengths.
Full comparison: Calling Any Model: Unified LLM Gateways & SDKs in 2026
Looking for a LiteLLM alternative? LiteLLM is listed under SDK (open source). The 4 tools below cover similar jobs, closest matches first — the table compares pricing, license, and platforms so you can shortlist quickly, and each entry further down adds a fuller summary and a link to the full profile.
| Tool | Pricing | License | Platforms | Category |
|---|---|---|---|---|
| Vercel AI SDK | open source | Apache-2.0 | — | SDK |
| OpenRouter | freemium | — | — | Platform |
| Portkey | freemium | MIT | Web | Platform |
| vLLM | open source | Apache-2.0 | Linux | SDK |
Free and open-source alternatives to LiteLLM
LiteLLM alternatives in detail
Vercel AI SDK
open sourceApache-2.0SDKThe Vercel AI SDK is the de facto TypeScript toolkit for AI apps: one provider-agnostic API for text, structured objects, and tool calls, first-class streaming, and framework UI hooks (React, Svelte, Vue) for building chat and generative interfaces fast.
Read: Calling Any Model: Unified LLM Gateways & SDKs in 2026
OpenRouter
freemiumPlatformOpenRouter is a hosted gateway to hundreds of models across providers behind one OpenAI-compatible API, one API key, and one bill. It handles routing, automatic fallbacks, and provider load-balancing — the zero-infrastructure way to call any model, including some free ones.
Read: LiteLLM vs OpenRouter: One API for Every Model (2026)
Read: Calling Any Model: Unified LLM Gateways & SDKs in 2026
Read: LLM Gateways Compared: Portkey vs Helicone vs LiteLLM for Caching & Cost Control
Portkey
freemiumMITWebPlatformPortkey is an AI gateway and LLMOps platform: route to 1,600+ LLMs through one OpenAI-compatible API with simple and semantic caching, automatic retries, fallbacks, and load balancing — plus observability (logs, traces, cost and latency), prompt management, guardrails, virtual keys, and budgets. The fast routing gateway is open source (MIT) and self-hostable; the hosted control plane is freemium.
Read: LLM Gateways Compared: Portkey vs Helicone vs LiteLLM for Caching & Cost Control
vLLM
open sourceApache-2.0LinuxSDKvLLM is an open-source inference and serving engine for open-weight LLMs with high throughput on GPUs. PagedAttention manages the KV cache like virtual memory and continuous batching keeps hardware saturated, while an OpenAI-compatible server means existing clients work by swapping the base URL — the default engine for self-hosted production serving.