Who is Stainless best for?

Stainless is built for API platform and developer experience teams at API-first companies, AI 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 SDKs. Common use cases include 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.

How is Stainless priced?

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.

What are the alternatives to Stainless?

Common Documentation & Developer Portals alternatives to Stainless include Mintlify, GitBook, Fern, ReadMe, Docusaurus. See the full comparison hub at /verticals/documentation-developer-portals/compare.

What do users praise about Stainless?

Users frequently praise: 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.

What are common complaints about Stainless?

Frequently cited limitations: 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.

When was Stainless founded and where?

Stainless was founded in 2022, headquartered in New York, USA by Alex Rattray, Mark McGranaghan.

How big is Stainless?

Stainless reports 20-50 employees.

AI visibility report

AI visibility report for Stainless in Documentation & Developer Portals.

Outside the top three on 24 of the 25 prompts buyers actually ask.

Mintlify is cited on 15 of those losses.

25 prompts

6 platforms

Updated Sep 4, 2026 - refreshed weekly

Track Stainless daily

Free trial. Setup comes pre-filled for Stainless.

Track Stainless across these prompts daily.

Start free trial

2percent

Presence Rate

Low presence

Still absent from 98% of tracked prompt responses

Top-3 citations across 150 prompt × platform pairs

+0.40

Sentiment

-1.00.0+1.0

Positive

No clearrank

Peer Ranking

#1#11

No clear rankin Documentation & Developer Portals

Key Metrics

Presence Rate

2.0%

Share of Voice

0.9%

Avg Position

#35.8

Docs Presence

2.0%

Blog Presence

0.0%

Brand Mentions

4.0%

Platform Breakdown

Grok

8%2/25 prompts

ChatGPT

Research dossierCapabilities, use cases, sources, reviews, pricing, and FAQ

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.

AI visibility report

AI visibility report for Stainless in Documentation & Developer Portals.

Outside the top three on 24 of the 25 prompts buyers actually ask.

Mintlify is cited on 15 of those losses.

25 prompts

6 platforms

Updated Sep 4, 2026 - refreshed weekly

Track Stainless daily

Free trial. Setup comes pre-filled for Stainless.

Track Stainless across these prompts daily.

Start free trial

2percent

Presence Rate

Low presence

Still absent from 98% of tracked prompt responses

Top-3 citations across 150 prompt × platform pairs

+0.40

Sentiment

-1.00.0+1.0

Positive

No clearrank

Peer Ranking

#1#11

No clear rankin Documentation & Developer Portals

Key Metrics

Presence Rate

2.0%

Share of Voice

0.9%

Avg Position

#35.8

Docs Presence

2.0%

Blog Presence

0.0%

Brand Mentions

4.0%

Platform Breakdown

Grok

8%2/25 prompts

ChatGPT

Research dossierCapabilities, use cases, sources, reviews, pricing, and FAQ

Overview

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.

Prompt	Google AI Mode	Perplexity	ChatGPT	Gemini Search	Bing Copilot	Grok
Capability1/5 cited (20%)
Which developer documentation portals support content gating — showing different docs to authenticated customers vs. anonymous visitors?	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited	A competitor was cited	A competitor was cited
Looking for a documentation platform that supports embedded API playgrounds, diagrams, and interactive tutorial flows — what are my options beyond basic markdown?

#	Brand	PresencePres.	Share of VoiceSoV	DocsDocs	BlogBlog	MentionsMent.	Avg PosPos	Sentiment
1	Mintlify	31.3%	26.1%	2.0%	6.7%	60.0%	#27.0	+0.44
2	GitBook	30.0%	30.9%	14.0%	22.0%	60.7%	#40.3	+0.38
3	Fern	15.3%	10.2%	2.7%	2.0%	18.0%	#19.9	+0.35
4	ReadMe	11.3%	8.4%	9.3%	4.0%	56.7%	#41.9	+0.41
5	Docusaurus	8.7%	9.5%	7.3%	2.0%	0.0%	#47.4	+0.21
6	Bump.sh	5.3%	6.1%	1.3%	5.3%	8.0%	#34.9	+0.25
7	Redocly	4.0%	3.4%	2.0%	2.0%	30.7%	#53.3	+0.33
8	Archbee	2.7%	2.7%	2.0%	2.0%	5.3%	#72.4	+0.25
9	Stainless	2.0%	0.9%	2.0%	0.0%	4.0%	#35.8	+0.40
10	Scalar	2.0%	1.6%	0.7%	0.0%	12.0%	#56.3	+0.67
11	Swimm	0.0%	0.0%	0.0%	0.0%	0.7%	—	—

Developer Experience0/5 cited (0%)
Which documentation platforms offer the best collaboration features so non-technical writers and engineers can work together without friction?	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited

Integrations & Ecosystem0/5 cited (0%)
Which documentation platforms have the best native integration with OpenAPI, AsyncAPI, and GraphQL schemas for auto-generating reference docs?	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited

Performance & Reliability0/5 cited (0%)
Which documentation platforms handle very large sites well — thousands of pages without degraded build times or slow navigation?	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited

AI visibility report for Stainless in Documentation & Developer Portals.

Key Metrics

Platform Breakdown

Overview

AI visibility report for Stainless in Documentation & Developer Portals.

Key Metrics

Platform Breakdown

Overview

Prompts where competitors are visible and Stainless is not.

Where Stainless is winning

Where Stainless is losing5

Key Facts

Key Capabilities10

Key Use Cases7

Stainless customer outcomes

Recent Trend

How AI describes Stainless3

Most cited sources3

Alternatives in Documentation & Developer Portals6

Reviews

Pricing

Limitations

Topic Coverage

Prompt-Level Results

Vertical Ranking

Turn this into your team dashboard

Frequently asked questions

Setup & First Run1/5 cited (20%)
Which documentation platforms support a docs-as-code workflow where engineers write in markdown, review in pull requests, and auto-publish on merge?	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited

AI visibility report for Stainless in Documentation & Developer Portals.

Key Metrics

Platform Breakdown

Overview

AI visibility report for Stainless in Documentation & Developer Portals.

Key Metrics

Platform Breakdown

Overview

Prompts where competitors are visible and Stainless is not.

Where Stainless is winning

Where Stainless is losing5

Key Facts

Key Capabilities10

Key Use Cases7

Stainless customer outcomes

Recent Trend

How AI describes Stainless3

Most cited sources3

Alternatives in Documentation & Developer Portals6

Reviews

Pricing

Limitations

Topic Coverage

Prompt-Level Results

Vertical Ranking

Turn this into your team dashboard

Frequently asked questions

What does Stainless do?

Who is Stainless best for?

How is Stainless priced?

What are the alternatives to Stainless?

What do users praise about Stainless?

What are common complaints about Stainless?

When was Stainless founded and where?

How big is Stainless?