Stainless

Web · Mac · Linux

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Stainless is ranked #8 of 33 in code generators on Freedom251. It runs on Linux, macOS, Web. There is a free plan. A free trial is offered.

Stainless plans and pricing

All plans

Free Free Up to 5 generators · 5 seats · ≤25 endpoints incl. · 100 preview builds/mo free · rate limit 25/day stainless.com · 4 Oct 2026

Compared on code generators

Free plan: Yes
Project scaffolding: Yes
Schema-to-code generation: Yes
CLI available: Yes
Supported languages: TypeScript, Python, Go, Java, Kotlin, Ruby, PHP, C#, SQL

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The record

What it does: Stainless generates SDKs, documentation, and MCP servers from an OpenAPI specification.
SDK languages: Its SDK product lists TypeScript, Python, Go, Java, Kotlin, Ruby, Terraform, C#, and PHP.
SDK features: Generated SDKs include rich types, auto-pagination, and retries out of the box.
Docs platform: The Docs Platform keeps REST API, SDK, and narrative documentation in sync with the API and is built on Astro.
Docs features: The Docs Platform advertises AI-powered hybrid search, Markdown copying, AI-tool integration, and light and dark modes.
MCP servers: Stainless generates code-mode MCP servers from OpenAPI specs so agents can use SDKs and documentation instead of many endpoint schemas.
MCP clients: The MCP product page names Claude Code and Cursor as tools where agents can use its generated MCP servers.
Docs integrations: Stainless lists ReadMe, Mintlify, Redocly, bump.sh, GitBook, and Docusaurus as documentation providers that support its SDK code snippets.
Source control: Stainless requires users to have a GitHub account for authentication and access to generated staging repositories.
Support: The pricing page lists email support for the Free plan.
Trial: When users exceed the Free Plan terms, they are automatically enrolled in a 30-day free trial of a paid plan.
Security: Stainless says Business and Enterprise customers can request its SOC 2 compliance report.
Hosting limit: Stainless says its code generation cannot be hosted on-premise, though generated SDKs can be hosted in a private GitHub repository.
Company status: Stainless says it is joining Anthropic.
Price from: Free

Where it ranks on Freedom251

Best Code Generators in 2026#8 of 33
Best Developer Documentation Software in 2026#7 of 27

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Sources

stainless.com· checked 4 Oct 2026
stainless.com/products/sdks/· checked 4 Oct 2026
stainless.com/products/docs/· checked 4 Oct 2026
stainless.com/products/mcp/· checked 4 Oct 2026
stainless.com/docs/docs-integrations/· checked 4 Oct 2026
stainless.com/pricing/· checked 4 Oct 2026