LiteLLM Alternatives: A 2026 Comparison

LiteLLM is an open-source proxy that lets you call 100+ LLM providers through one OpenAI-compatible API. It is free to self-host. Many teams use it as the backbone of their AI infrastructure.

But LiteLLM is not the only option. A 2024 security incident raised concerns about its supply chain. Some teams want a managed service instead of running their own proxy. Others need compliance certs that self-hosted software cannot provide on its own.

This guide compares LiteLLM to its top alternatives: OpenRouter, Portkey, Unify, Cloudflare AI Gateway, Vercel AI SDK, and direct API access. We are vendor-neutral. Layer3 Labs does not resell any of these tools.

LiteLLM vs. Alternatives: Side-by-Side

Quick verdict

LiteLLM is the strongest pick if you want full control and have DevOps capacity. No other option gives you the same combination of open source, self-hosting, and provider breadth at zero markup.

The 2024 security incident is the asterisk. If your team cannot closely track upstream patches and review dependency changes, a managed alternative like Portkey or AWS Bedrock removes that burden.

For teams that just need quick access to many models without running infrastructure, OpenRouter is the fastest path. For enterprise compliance, Bedrock is the safest default.

OpenRouter: broadest catalog, zero ops

OpenRouter is a managed API gateway. You get one endpoint and access to hundreds of models. There is no infrastructure to manage.

The trade-off is control. OpenRouter is cloud-only. You cannot self-host it. Data passes through their servers. The catalog includes Chinese-developed models like DeepSeek by default.

OpenRouter charges a per-token markup over provider prices. For prototyping and non-sensitive work, this is fine. For regulated workloads, the lack of published compliance certs is a gap.

• Best for: fast prototyping, broad model access, no-ops teams
• Weakness: no self-hosting, no published compliance certs, Chinese-model exposure by default

Portkey: managed compliance and guardrails

Portkey is a managed AI gateway with SOC 2 and GDPR coverage. It connects to 250+ models and adds observability, caching, and guardrails on top.

Guardrails are the key differentiator. You can set rules that block or flag certain outputs before they reach your users. That matters for regulated industries.

Pricing is usage-based. You pay for platform features, not per-token markup on model costs. The gateway is open-source, but the full platform with guardrails and analytics is SaaS-only.

• Best for: teams that need managed compliance and output guardrails
• Compliance: SOC 2, GDPR
• Weakness: full platform is SaaS-only, cannot fully self-host

Cloudflare, Vercel AI SDK, and direct API

Cloudflare AI Gateway is a proxy that sits between your app and AI providers. It adds caching, rate limiting, and analytics. It runs on Cloudflare's edge network and has a generous free tier.

Vercel AI SDK is an open-source TypeScript toolkit. It is not a proxy or gateway. It provides a unified interface for calling different model providers from your own code. You host it wherever you want.

Direct API access skips all middlemen. You call each provider with their own SDK. Maximum control, maximum integration work. This is the safest option for compliance since you control every hop in the chain.

• Cloudflare: edge proxy, free tier, SOC 2 and ISO 27001 via Cloudflare
• Vercel AI SDK: free OSS, BYO hosting, not a proxy
• Direct API: zero markup, zero middleman, highest integration effort

The LiteLLM security incident: what happened

In 2024, LiteLLM had a supply chain security incident that affected its PyPI package. Malicious code was injected through a compromised dependency. The project patched the issue and published a post-mortem.

For teams considering LiteLLM today, the incident is resolved. But it raised a real question: can your team monitor open-source dependencies closely enough to catch the next one?

If the answer is yes, LiteLLM is still the best self-hosted routing proxy. If the answer is no, consider a managed alternative where the vendor handles supply chain security for you.

How to choose the right LiteLLM alternative

Start with two questions. First, can your team handle the ops burden of self-hosting? If no, eliminate LiteLLM and Vercel AI SDK. Look at Portkey, Cloudflare, or direct API.

Second, do you need compliance certs? If yes, Portkey (SOC 2, GDPR) or AWS Bedrock (SOC 2, ISO 27001, HIPAA) are the strongest picks. OpenRouter and self-hosted LiteLLM cannot provide vendor-issued certs.

Cost is rarely the deciding factor. LiteLLM is free but your ops team is not. Direct API is cheapest per token but costs more in integration time. Match the tool to your team, not just your budget.

• Can self-host and want control: LiteLLM
• Need managed compliance: Portkey or AWS Bedrock
• Need fast access to many models: OpenRouter
• Want zero dependencies: direct API access

The Verdict

LiteLLM earns its spot as the most popular open-source LLM proxy. Free, self-hosted, and broad. If your team can own the ops and security monitoring, it is hard to beat on cost and control.

For teams that cannot or prefer not to self-host, Portkey is the strongest managed alternative. It adds compliance certs, guardrails, and observability that LiteLLM's open-source tier cannot match.

Whatever you choose, audit which models your routing layer can reach. A routing tool that silently exposes Chinese-hosted models is a compliance risk whether it is self-hosted or managed.