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AI visibility report for Stainless

Vertical: Documentation & Developer Portals

AI search visibility benchmark across 5 platforms in Documentation & Developer Portals.

Track this brand
25 prompts
5 platforms
Updated Jun 5, 2026
3percent

Presence Rate

Low presence

Top-3 citations across 125 prompt × platform pairs

+0.25

Sentiment

-1.00.0+1.0
Positive
#9of 11

Peer Ranking

#1#11
Below averagein Documentation & Developer Portals

Key Metrics

Presence Rate3.2%
Share of Voice1.8%
Avg Position#23.7
Docs Presence2.4%
Blog Presence0.8%
Brand Mentions3.2%

Platform Breakdown

Grok
8%2/25 prompts
ChatGPT
4%1/25 prompts
Google AI Mode
4%1/25 prompts
Gemini Search
0%0/25 prompts
Perplexity
0%0/25 prompts

Overview

Stainless is a New York-based developer platform founded in 2022 that generates production-quality SDKs, API documentation, and MCP servers from OpenAPI specifications. Built by the engineer who led API docs and SDK tooling at Stripe, Stainless aims to make 'Stripe-quality' developer experience accessible to any API company. Its generator produces idiomatic, fully maintained client libraries in TypeScript, Python, Go, Java, Kotlin, Ruby, C#, PHP, and Terraform, and handles auto-pagination, retries, streaming, and versioning automatically. In 2025 the company expanded into a code-first Docs Platform built on Astro, and MCP server generation for AI agent integrations. Customers include OpenAI, Anthropic, Cloudflare, Mux, Modern Treasury, and Replicate. Stainless raised a $25M Series A led by a16z in December 2024.

Stainless is an API developer experience platform offering three core products derived from an OpenAPI spec: (1) an SDK Generator that produces idiomatic, production-maintained client libraries in up to nine languages; (2) a Docs Platform providing a code-first, AI-agent-ready documentation site built on Astro with SDK-aware API reference and built-in AI chat; and (3) an MCP Server generator that exposes REST APIs as tools for AI coding agents. All three products stay in sync as the OpenAPI spec evolves, eliminating manual maintenance overhead for API platform teams.

Key Facts

Founded
2022
HQ
New York, USA
Founders
Alex Rattray, Mark McGranaghan
Employees
20-50
Funding
$25M+
Status
Private

Target users

API platform and developer experience teams at API-first companiesAI model providers and LLM API companies (e.g., OpenAI, Anthropic ecosystem)Developer infrastructure and cloud platform companies (e.g., Cloudflare, DigitalOcean)Fintech and regulated-industry API providers needing consistent multi-language SDKsGrowth-stage startups shipping their first official SDKs and documentationEngineering leads and API architects evaluating SDK automation to reduce maintenance overhead
stainless.com

Key Capabilities10

  • OpenAPI-to-SDK generation across TypeScript, Python, Go, Java, Kotlin, Ruby, C#, PHP, and Terraform
  • MCP (Model Context Protocol) server generation from OpenAPI specs for AI agent integrations
  • Code-first Docs Platform (built on Astro) with SDK-aware API reference, AI chat, and docs-as-code workflows
  • Stainless Transforms for preprocessing imperfect OpenAPI specs without modifying upstream source
  • Preview builds in CI that show exact SDK diffs before merging OpenAPI changes
  • Automated SDK versioning, changelog generation, and GitHub Release PR management
  • CLI generator producing production-ready native binaries from OpenAPI specs
  • Experimental SQL SDK generator that exposes REST APIs as PostgreSQL functions
  • Language Server (LSP) for real-time spec diagnostics and completions in local IDEs
  • Built-in support for auto-pagination, retries, streaming (SSE, WebSocket), and OAuth 2.0

Key Use Cases7

  • API-first companies shipping and maintaining idiomatic multi-language SDKs without dedicated SDK engineers
  • AI model providers (LLM APIs) offering typed, auto-updating client libraries to millions of developers
  • Developer infrastructure platforms automating SDK updates in sync with rapidly evolving OpenAPI specs
  • Teams publishing API documentation that stays automatically in sync with their OpenAPI spec and generated SDKs
  • Companies generating MCP servers to expose their APIs to AI coding agents and agentic workflows
  • Fintech and regulated-industry API providers needing consistent, auditable SDK releases across languages
  • Platform teams reducing integration support burden by providing high-quality typed client libraries

Stainless customer outcomes

Cloudflare

1,000+ endpoints across 3 language SDKs with automated updates

Cloudflare transitioned from inconsistent, manually maintained SDKs to automatically shipping over 1,000 API endpoints across three language SDKs with hands-off updates, enabling a single pull-request workflow for the majority of API changes.

Beeper

Live API docs in 2 days

Beeper was able to launch production API documentation for their new API using the Stainless Docs Platform in just two days, far faster than anticipated.

Recent Trend

Visibility-1.3 pts
Avg positionNo trend yet
SentimentNo trend yet

How AI describes Stainless3

### Stainless Stainless is the engine famously trusted by API-first giants like OpenAI, Cloudflare, and Litellm to power their official SDKs.

Which documentation platforms generate the most accurate and idiomatic SDK code samples automatically from an OpenAPI spec?

google-aiDirect Stainless mention
Multi-language snippets : Strong support via OpenAPI/AsyncAPI integration and SDK integrations (e.g., Speakeasy/Stainless).

Which developer portal platforms offer the best code sample experience — multi-language snippets, inline API explorers, and runnable examples?

xai-searchDirect Stainless mention
Fern, Speakeasy, Stainless, and APIMatic are among the strongest for generating accurate, idiomatic SDK code samples automatically from OpenAPI specs in documentation platforms.

Which documentation platforms generate the most accurate and idiomatic SDK code samples automatically from an OpenAPI spec?

xai-searchDirect Stainless mention

Most cited sources8

Alternatives in Documentation & Developer Portals6

Stainless occupies a premium niche as an all-in-one API developer experience platform that generates idiomatic SDKs, a code-first docs site, and MCP servers from a single OpenAPI spec.

  • Its core differentiator is the pursuit of 'Stripe-quality' API tooling—rooted in the founder's background building API tooling at Stripe—targeting API-first companies that want to offer handcrafted-feeling, multi-language client libraries and documentation without hiring dedicated SDK engineering teams.
  • Stainless competes primarily on code quality, enterprise pedigree (OpenAI, Anthropic, Cloudflare as reference customers), and its emerging AI-agent experience (AX) positioning, which is less emphasized by documentation-only competitors.
  • Unlike Fern (its closest analog), Stainless was public about shipping the official SDKs for OpenAI and Anthropic before offering self-serve access, lending a strong trust signal to enterprise buyers.
View category comparison hub

Reviews

Praised

  • High-quality, idiomatic SDK code generation
  • Eliminates manual SDK maintenance overhead
  • Strong multi-language coverage (9+ languages)
  • Seamless GitHub-based CI/CD workflow
  • Handles complex, large OpenAPI schemas other tools cannot
  • Fast time-to-production for docs and SDKs
  • Pedigreed by powering OpenAI and Anthropic SDKs
  • Active product development cadence

Criticized

  • No on-premise or self-hosted code generation option
  • Requires GitHub account for all users
  • API endpoint limits on lower-tier plans
  • Docs Platform relatively new (public beta 2026)
  • Pricing per-generator can add up for multi-language API teams
  • SOC 2 report only available on higher-tier plans

No independent third-party review data (G2, Gartner Peer Insights, Capterra) was publicly available for Stainless as of April 2026. Published customer testimonials highlight speed of setup, quality of generated code, and elimination of manual SDK maintenance overhead. Cloudflare noted moving from inconsistent manual SDKs to shipping 1,000+ endpoints across three language SDKs with automated updates within months. Beeper reported going live with API docs in 2 days using the Docs Platform. Sentiment in developer communities and press coverage is broadly positive, with coverage in TechCrunch and Analytics India Mag.

Pricing

Stainless charges per 'generator' (each SDK, Docs site, or MCP server counts as one generator). Free tier: $0, up to 5 generators, ≤25 API endpoints, basic features.

  • Starter

    $79/month per generator (monthly billing; annual discounts available), up to 50 endpoints included, onboarding Slack support.

  • Pro

    $499/month per generator, up to 100 endpoints, dedicated Slack channel, mock test server, OAuth 2.0, up to 10,000 lines of custom code.

  • Enterprise

    custom pricing with SSO, audit logs, breaking change detection, advanced release management, SLAs, and white-glove onboarding. Volume discounts available on paid plans. Generated SDK code is licensed Apache 2.0 and owned by the customer. Non-commercial open-source projects may qualify for a free Starter plan.

Limitations

  • Stainless code generation cannot be deployed on-premise; the generation engine runs exclusively on Stainless infrastructure.
  • A GitHub account is required for authentication and SDK delivery.
  • Free and Starter tiers cap included API endpoints (≤25 and 50 respectively), with overage billed per endpoint.
  • Custom code additions are capped at 1,000 lines on Starter and 10,000 lines on Pro.
  • The Docs Platform entered public beta only in March 2026 and lacks some mature features found in established documentation platforms.
  • SOC 2 compliance report is only available on Business/Enterprise plans upon request.
  • No on-premise or air-gapped deployment option exists.

Frequently asked questions

Topic Coverage

Capability1/5DevEx1/5Integrations &Ecosystem0/5Performance &Reliability0/5Setup & First Run1/5

Prompt-Level Results

Brand citedCompetitor citedNot cited
PromptGemini SearchChatGPTPerplexityGoogle AI ModeGrok
Capability1/5 cited (20%)

Which developer documentation portals support content gating — showing different docs to authenticated customers vs. anonymous visitors?

Looking for a documentation platform that supports embedded API playgrounds, diagrams, and interactive tutorial flows — what are my options beyond basic markdown?

Which documentation platforms handle changelog management best — auto-generating changelogs from commit messages or API spec diffs?

Which developer portal platforms offer semantic search rather than just keyword matching across docs?

Which documentation platforms generate the most accurate and idiomatic SDK code samples automatically from an OpenAPI spec?

Developer Experience1/5 cited (20%)

Which developer portal platforms offer the best code sample experience — multi-language snippets, inline API explorers, and runnable examples?

Which developer documentation platforms do engineers actually keep up to date — what makes the writing experience good enough that docs don't become stale?

What tools help teams keep auto-generated API reference docs in sync with the actual API as it evolves?

Which documentation platforms handle versioned docs for multiple active major versions without duplicating content across v2 and v3?

Which documentation platforms offer the best collaboration features so non-technical writers and engineers can work together without friction?

Integrations & Ecosystem0/5 cited (0%)

Which documentation platforms offer the best analytics — page visits, drop-off points, and search queries from developer users?

Which documentation platforms handle localisation and machine translation workflows well while still supporting a human review process?

Which developer documentation tools integrate into CI/CD pipelines for automatic validation and publishing when an API changes?

Which documentation platforms can pull content from multiple repositories in a monorepo or multi-repo setup and stitch it into a single unified portal?

Which documentation platforms have the best native integration with OpenAPI, AsyncAPI, and GraphQL schemas for auto-generating reference docs?

Performance & Reliability0/5 cited (0%)

What are the best self-hosted documentation platforms for teams that want minimal infrastructure overhead and zero-downtime deployments?

Which hosted documentation platforms perform best for a global developer audience — CDN coverage and page load times for international users?

Which documentation platforms score best on Core Web Vitals — is SEO performance a real differentiator when choosing a docs tool?

Which documentation platforms handle very large sites well — thousands of pages without degraded build times or slow navigation?

Which SaaS documentation platforms offer the strongest SLAs and have the best track record for uptime on customer-facing developer docs?

Setup & First Run1/5 cited (20%)

What's the fastest documentation platform to get a professional API docs site live from an existing OpenAPI spec?

Which developer documentation platforms make it easiest to white-label with a custom domain and brand styles for a B2B SaaS product?

I'm migrating a large docs site from a static site generator to a managed platform — which documentation tools handle URL migration and redirects well?

What documentation platforms handle multi-audience portals well — separate content access and versioning for different customer tiers?

Which documentation platforms support a docs-as-code workflow where engineers write in markdown, review in pull requests, and auto-publish on merge?

Strengths

No clear strengths identified yet.

Gaps5

  • Looking for a documentation platform that supports embedded API playgrounds, diagrams, and interactive tutorial flows — what are my options beyond basic markdown?

    Competitors on 4 platforms

  • I'm migrating a large docs site from a static site generator to a managed platform — which documentation tools handle URL migration and redirects well?

    Competitors on 4 platforms

  • Which documentation platforms have the best native integration with OpenAPI, AsyncAPI, and GraphQL schemas for auto-generating reference docs?

    Competitors on 4 platforms

  • Which hosted documentation platforms perform best for a global developer audience — CDN coverage and page load times for international users?

    Competitors on 3 platforms

  • Which developer documentation platforms do engineers actually keep up to date — what makes the writing experience good enough that docs don't become stale?

    Competitors on 3 platforms

Vertical Ranking

#BrandPres.SoVDocsBlogMent.PosSentiment
1Mintlify44.8%31.8%2.4%14.4%42.4%#21.3+0.22
2GitBook32.0%24.4%16.0%27.2%32.0%#40.5+0.26
3Fern24.8%8.8%1.6%3.2%24.0%#20.4+0.23
4ReadMe17.6%8.4%9.6%8.0%17.6%#35.8+0.24
5Docusaurus (Meta)12.0%8.8%10.4%2.4%10.4%#40.8+0.10
6Bump.sh10.4%6.3%2.4%10.4%9.6%#28.3+0.19
7Redocly8.0%5.3%3.2%4.0%8.0%#31.8+0.19
8Archbee7.2%3.3%2.4%5.6%5.6%#49.9+0.29
9Stainless3.2%1.8%2.4%0.8%3.2%#23.7+0.25
10Scalar1.6%1.1%0.8%0.0%1.6%#65.0+0.60
11Swimm0.8%0.2%0.0%0.0%0.8%#11.0+0.80

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