Acquisition
May 2026Anthropic announced it was acquiring Stainless and bringing the Stainless team into Anthropic.
SourceCompany research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Stainless built a developer-platform product for APIs: it generates idiomatic SDKs, MCP servers, and documentation from OpenAPI specs. The company was founded in 2022 in New York and announced in May 2026 that it was joining Anthropic, while winding down hosted Stainless products.
Primary product
API developer platform that generates SDKs, MCP servers, and docs from OpenAPI specs
Founded
2022
Headquarters
180 Varick St, Suite 1230, New York, NY 10014, United States
Team size
20-30
Work style
Hybrid
Industry
Software Development
Sub-industry
Developer tools / API SDK generation
Offices
180 Varick St, Suite 1230, New York, NY 10014, United States
Lansdale, Pennsylvania, United States
Deerfield Beach, Florida, United States
Business model
tiered SaaS subscriptions
free tier / self-service
enterprise contracts
usage-based billing
Funding
People & investors
Leadership
Founder & CEO (through May 2026)
President / CTO
Head of Product Engineering
Head of Sales
Head of Marketing & DevRel
Devyn Greenberg
Head of Business Operations
Work & culture
Public materials emphasize craft, developer experience, high-quality APIs, and agent-friendly tooling; the tone is engineering- and product-quality oriented rather than perks-oriented.
Work style
Hybrid
Product & market
Pricing
Tiered SaaS with Free, Starter, Pro, and Enterprise plans; monthly or annual billing, with invoicing/PO terms on higher tiers and size/API-based pricing signals.
Differentiators
- —Generates idiomatic, language-native SDKs from OpenAPI specs
- —Keeps SDKs, docs, and releases in sync as APIs change
- —Generates MCP servers and CLI tools from the same spec
- —Supports custom-code handling so manual changes can persist across regenerations
- —Provides a code-first docs platform with SDK-aware reference and AI-agent-friendly workflows
Technology
OpenAPI
TypeScript
Python
Go
Java
React
GraphQL
gRPC
Astro
Cloudflare
GitHub
Vercel
Salesforce
Datadog
Stripe
HubSpot
Segment
Slack
Notion
Workday
Customers
OpenAI
Anthropic
Cloudflare
Meta (Llama)
Groq
Cerebras
Mux
Runway
Modern Treasury
Metronome
Orb
LangChain
Perplexity
Replicate
Writer
Competitors
Speakeasy
LibLab
OpenAPI Generator
StepZen
Strapi
Scale & contact
Estimated revenue
Low seven figures ARR (around $1M as publicly reported in Dec 2024)
Estimated monthly visits
202.3K
Signals & risks
Shutdown
May 2026Stainless said it would wind down all hosted Stainless products, including its SDK generator; new signups, projects, and SDKs would no longer be available.
SourceLatest news
Anthropic · May 2026
Anthropic announced it was acquiring Stainless, saying Stainless would extend Claude Platform capabilities and agent connectivity to APIs.
Stainless · May 2026
Stainless said it was joining Anthropic and would wind down all hosted Stainless products, including its SDK generator, with new signups and projects closed.
Stainless · Mar 2026
Stainless launched the Docs Platform in public beta, positioning it as a code-first, SDK-aware docs system for humans and agents.
Stainless · Jan 2026
Stainless said its CLI generator reached general availability, turning APIs into command-line tools with help text, completion, and agent-friendly workflows.
Stainless · Dec 2024
Stainless announced a $25M Series A led by a16z, with participation from Sequoia, The General Partnership, Felicis, Zapier, and MongoDB Ventures.
Jobs and careers at Stainless
0 jobs at Stainless
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