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APIs · head to head

LiteLLM vs Stainless

LiteLLM logo

LiteLLM

APIs

The AI Gateway for platform teams

From
Free
Rated
-
Full reviewWebsite
Stainless logo

Stainless

APIs

Generates client SDKs, API docs, and MCP servers from an OpenAPI spec

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: LiteLLM enterprise pricing based on annual request capacity and deployment architecture, sized via direct sales; Stainless starter and Pro plan prices are not published and require contacting the company.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which LiteLLM and Stainless actually diverge.

Attributes where LiteLLM and Stainless differ
AttributeLiteLLMStainless
Pricing modelopen-sourcefreemium
PlatformsWebweb, api

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (APIs).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in LiteLLM

Nothing recorded that Stainless does not also cover.

Only in Stainless

  • SDK generation
  • MCP server generation
  • Docs site generation
  • Webhooks and streaming support
  • Automated unit tests
  • Git integration

What people use each for

The jobs each tool is most often brought in to do.

LiteLLM

  • Accessing 140+ LLM providers through single APInot Stainless
  • Implementing cost-based routing for advanced AI tasksnot Stainless
  • Deploying new LLM models usually within a daynot Stainless
  • Switching backend models with config changes onlynot Stainless
  • Maintaining consistent access across 100+ endpointsnot Stainless

Stainless

  • Generating typed SDKs for a public APInot LiteLLM
  • Producing an MCP server from an existing OpenAPI specnot LiteLLM
  • Building an API documentation site alongside client librariesnot LiteLLM
  • Giving open-source APIs a free SDK generation pathnot LiteLLM

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

LiteLLM

  • Enterprise pricing based on annual request capacity and deployment architecture, sized via direct sales
  • Not per-token based pricing for Enterprise tier

Stainless

  • Starter and Pro plan prices are not published and require contacting the company.
  • The free plan caps APIs at 25 endpoints, which excludes larger production APIs.
  • Overage charges apply per SDK/endpoint/month once limits are exceeded, which can make costs unpredictable at scale.

Pricing, plan by plan

LiteLLM

Free
  • Open SourceFree
    • 100+ providers
    • One OpenAI API
    • Virtual keys
  • Enterprise$null/mo
    • All Open Source features
    • SSO + SCIM
    • OIDC/JWT authentication

Stainless

Free
  • FreeFree
    • Up to 5 generators (SDKs, docs, or MCP servers)
    • 5 seats
    • APIs with 25 or fewer endpoints
  • Starter$undefined/mo
    • Unlimited generators
    • Expanded seats
    • Private SDKs of any size
  • Pro$undefined/mo
    • Custom enterprise features and pricing
  • Enterprise$undefined/mo
    • Dedicated support
    • SOC 2 compliance reports
    • Purchase order/invoicing with negotiable terms

Which should you pick?

Choose LiteLLM if

  • You want to start without paying.
LiteLLM review

Choose Stainless if

  • You need sdk generation.
  • You want to start without paying.
  • You work on web, api.
  • You also want mcp server generation.
Stainless review

Questions people ask

Is LiteLLM or Stainless better?
Neither clearly leads. LiteLLM starts at Free and Stainless at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, LiteLLM or Stainless?
LiteLLM starts at Free and Stainless at Free.
Does LiteLLM or Stainless run on more platforms?
LiteLLM runs on Web. Stainless runs on web, api.
Can I use LiteLLM for free?
Both have a free tier, so you can try either at no cost before committing.
What is LiteLLM best used for?
LiteLLM is most often used for accessing 140+ llm providers through single api, implementing cost-based routing for advanced ai tasks, deploying new llm models usually within a day, switching backend models with config changes only. Of those, accessing 140+ llm providers through single api and implementing cost-based routing for advanced ai tasks are not what Stainless is typically brought in for.
What can LiteLLM do that Stainless cannot?
Stainless covers SDK generation, MCP server generation, Docs site generation, Webhooks and streaming support.

Answered from the vendors’ own pages

LiteLLM: Is LiteLLM free to use?

Yes, LiteLLM's open-source version is free forever and requires no credit card. Self-host in minutes with support for 100+ LLM providers.

Source
Stainless: Is there a free plan, and what are its limits?

Yes. The Free plan supports up to 5 generators, 5 seats, APIs with 25 or fewer endpoints, and 100 preview builds per month, with email support.

Source
LiteLLM: What does LiteLLM's Enterprise plan cost?

Enterprise pricing is custom and annual, sized based on your annual gateway request capacity, deployment architecture, and support needs. Not charged per token.

Source
Stainless: Who owns the generated SDK code?

The generated SDK code is owned by the customer and published by Stainless under the Apache 2.0 license.

Source
LiteLLM: Is there a free trial for Enterprise?

Yes, a 30-day Enterprise trial key is available via email with no credit card required.

Source
Stainless: What happens if I exceed my plan's endpoint limit?

Customers exceeding their endpoint limits are billed per SDK, per endpoint, per month for the overage.

Source
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