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Industries
Data & Analytics
Enterprise Software
Company Size
11-50
Company Stage
Series A
Total Funding
$27.7M
Headquarters
New York City, New York
Founded
2022
StainlessAPI provides tools that help software engineers create high-quality Software Development Kits (SDKs) for REST APIs. Their main product automatically generates SDKs from an OpenAPI Specification, which is a standard way to define APIs. This means developers can easily create libraries that are user-friendly in specific programming languages, allowing them to focus on building and improving their APIs instead of spending time on writing and maintaining client libraries. Unlike many competitors, StainlessAPI emphasizes automation in the SDK generation process, which helps speed up development and ensures the code is of high quality. The company's goal is to simplify API management and development, making it easier for developers and tech companies to integrate software solutions efficiently.
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Total Funding
$27.7M
Above
Industry Average
Funded Over
2 Rounds
Industry standards
Health Insurance
Company Equity
Commuter Benefits
Unlimited Paid Time Off
Stainless Software Inc. has raised $25M in a Series A funding round led by Andreessen Horowitz, with participation from Sequoia, The General Partnership, and others. The company uses AI to generate SDKs from APIs, supporting languages like Python and Go. Stainless claims hundreds of paying customers, including OpenAI and Meta, and reports $1M in annual recurring revenue. The service offers a free tier and paid plans ranging from $250/month to $30k/year.
Stainless, a startup offering an AI-powered API-to-SDK generator to customers like OpenAI, Anthropic, and Meta, raised a $25M Series A led by a16z (Kyle wiggers/techcrunch).
Rattray, who studied economics at the University of Pennsylvania, has been building things for as long as he can remember, from an underground newspaper in high school to a bike-share program in college. Rattray picked up programming on the side while at UPenn, which led to a job at Stripe as an engineer on the developer platform team. At Stripe, Rattray helped to revamp API documentation and launch the system that powers Stripe's API client SDK.
Besides a focus on generative AI, what do AI startups like OpenAI, Anthropic and Together AI share in common? They use Stainless, a platform created by ex-Stripe staffer Alex Rattray, to generate SDKs for their APIs.Rattray, who studied economics at the University of Pennsylvania, has been building things for as long as he can remember, from an underground newspaper in high school to a bike share program in college. Rattray picked up programming on the side while at UPenn, which led to a job at Stripe as an engineer on the developer platform team.At Stripe, Rattray helped to revamp API documentation and launch the system that powers Stripeâs API client SDK. Itâs while working on those projects Rattray observed there wasnât an easy way for companies, including Stripe, to build SDKs for their APIs at scale.âHandwriting the SDKs couldnât scale,â he told TechCrunch. âToday, every API designer has to settle a million and one âbikeshedâ questions all over again, and painstakingly enforce consistency around these decisions across their API.âNow, you might be wondering, why would a company need an SDK if it offers an API? APIs are simply protocols, enabling software components to communicate with each other and transfer data. SDKs, on the other hand, offer a set of software-crafting tools that plug into APIs. Without an SDK to accompany an API, API users are forced to read API docs and build everything themselves, which isnât the best experience.Rattrayâs solution is Stainless, which takes in an API spec and generates SDKs in a range of programming languages including Python, TypeScript, Kotlin, Go and Java
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Industries
Data & Analytics
Enterprise Software
Company Size
11-50
Company Stage
Series A
Total Funding
$27.7M
Headquarters
New York City, New York
Founded
2022
Find jobs on Simplify and start your career today