
Stainless
Founded Year
2022Stage
Series A | AliveTotal Raised
$27.5MValuation
$0000Last Raised
$25M | 9 mos agoRevenue
$0000Mosaic Score The Mosaic Score is an algorithm that measures the overall financial health and market potential of private companies.
+187 points in the past 30 days
About Stainless
Stainless is focused on generating Software Development Kits (SDKs) for REST Application Programming Interface (APIs) within the software development industry. It offers a service that creates idiomatic, typesafe client libraries in multiple programming languages, designed to integrate with existing APIs. It primarily serves companies that require SDKs to facilitate integration and feature adoption for their APIs. It was founded in 2022 and is based in New York, New York.
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ESPs containing Stainless
The ESP matrix leverages data and analyst insight to identify and rank leading companies in a given technology landscape.
The AI agent tool libraries & integration platforms market provides developers with pre-built connectors, APIs, and SDKs to enable AI agents to interact with external applications and services. These platforms offer tool-calling capabilities, authentication management, and orchestration frameworks that allow AI agents to access hundreds of third-party tools through unified interfaces. Companies in…
Stainless named as Highflier among 7 other companies, including LangChain, Composio, and Merge.
Stainless's Products & Differentiators
SDK Generation
Generate SDKs for REST APIs
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Research containing Stainless
Get data-driven expert analysis from the CB Insights Intelligence Unit.
CB Insights Intelligence Analysts have mentioned Stainless in 1 CB Insights research brief, most recently on Aug 22, 2025.

Aug 22, 2025
The AI agent tech stackLatest Stainless News
Jan 3, 2025
Like Views: 1 Armed with some data from our friends at CrunchBase, I broke down the largest NYC Startup funding rounds in New York for December 2024. The analysis includes supplementary details like industry, company descriptions, round types, and total equity funding raised to provide a more comprehensive view of the venture capital landscape in NYC . The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series A Description: Cofactor allows companies to optimize every step of their electronics supply to manufacturing journey. Founded by Matthew Haber and Phillip Gulley in 2021, Cofactr has now raised a total of $28.4M in total equity funding and is backed by Y Combinator, Pioneer Fund, Correlation Ventures, Bain Capital Ventures, and DNX Ventures. Investors in the round: Bain Capital Ventures, Broom Ventures, DNX Ventures, Floating Point, Y Combinator Industry: Software, Supply Chain Management Founders: Matthew Haber, Phillip Gulley Founding year: 2021 Total equity funding raised: $28.4M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series A Description: Stainless is building the platform for high-quality, easy-to-use APIs Founded by Alex Rattray in 2021, Stainless has now raised a total of $28.5M in total equity funding and is backed by Sequoia Capital, Felicis, The General Partnership, Zapier, and MongoDB Ventures. Investors in the round: Felicis, MongoDB Ventures, Sequoia Capital, The General Partnership, Zapier Industry: Developer APIs, Developer Platform, Developer Tools, Enterprise Software, SaaS Founders: Alex Rattray Total equity funding raised: $28.5M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series B Description: Sollis Health offers concierge medical centers that provide on-demand care for families, including same-day visits and virtual care options. Founded by Andrew Olanow, Benjamin Kruger, and Dr. Bernard Kruger in 2017, Sollis Health has now raised a total of $80.4M in total equity funding and is backed by Foresite Capital, Torch Capital, Montage Ventures, Arkitekt Ventures, and Friedom Partners. Investors in the round: Foresite Capital, Friedom Partners, Montage Ventures, One Eight Capital, Read Capital, Torch Capital Industry: Health Care, Health Diagnostics, Medical, Personal Health Founders: Andrew Olanow, Benjamin Kruger, Dr. Bernard Kruger Founding year: 2017 Total equity funding raised: $80.4M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series A Description: Basis provides AI agents that automate accounting workflows for professionals. Founded by Ryan Serhant in 2023, Basis has now raised a total of $37.6M in total equity funding and is backed by Khosla Ventures, BoxGroup, Daniel Gross, Jeff Dean, and Kyle Vogt. Investors in the round: Aaron Levie, Adam D‚ÄôAngelo, Amjad Masad, Avid Ventures, Azeem Azhar, Better Tomorrow Ventures, BoxGroup, Claire Hughes Johnson, Clem Delangue, Daniel Gross, Douwe Kiela, Jack Altman, Jeff Dean, Jeff Wilke, Khosla Ventures, Kyle Vogt, Larry Summers, Lenny Rachitsky, Michele Catasta, Nat Friedman, NFDG Ventures, Noam Brown Industry: Accounting, Artificial Intelligence (AI), Information Technology Founders: Ryan Serhant Total equity funding raised: $37.6M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series B Description: Sage is an operation management system that enhances senior caregiving efficiency. Founded by Ellen Johnston, Matthew Lynch, and Raj Mehra in 2020, Sage has now raised a total of $59.0M in total equity funding and is backed by IVP, Friends & Family Capital, Maveron, ANIMO Ventures, and Goldcrest Capital. Investors in the round: ANIMO Ventures, Distributed Ventures, Friends & Family Capital, Goldcrest Capital, IVP, Maveron, Plus Capital Industry: Apps, Social, Software Founding year: 2020 The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Venture Description: S.MPLE by SERHANT provides AI-powered professional team of real estate experts. Founded by Ryan Serhant in 2020, S.MPLE by SERHANT has now raised a total of $45.0M in total equity funding and is backed by Camber Creek and Left Lane Capital. Investors in the round: Camber Creek, Left Lane Capital Industry: Commercial Real Estate, Real Estate, Real Estate Brokerage Founders: Ryan Serhant Total equity funding raised: $45.0M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series C Description: Precision Neuroscience is a neural platform that engages in brain-computer interface technology. Founded by Benjamin Rapoport, Demetrios Papageorgiou, Mark Hettick, and Michael Mager in 2021, Precision Neuroscience has now raised a total of $248.0M in total equity funding and is backed by General Equity Holdings, Alumni Ventures, B Capital, Draper Associates, and Duquesne Family Office. Investors in the round: B Capital, Duquesne Family Office, General Equity Holdings, Steadview Capital Industry: Medical, Medical Device, Neuroscience, Product Research Founders: Benjamin Rapoport, Demetrios Papageorgiou, Mark Hettick, Michael Mager Founding year: 2021 Total equity funding raised: $248.0M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series D Description: Public is a fractional investing platform that allows members to build diverse portfolios, including stocks, ETFs, crypto, and NFTs. Founded by Jannick Malling, Leif Abraham, Matt Kennedy, Peter Quinn, and Sean Hendelman in 2019, Public has now raised a total of $413.5M in total equity funding and is backed by Accel, Bossa Invest, Scott Belsky, Inspired Capital Partners, and Lakestar. Investors in the round: Accel Industry: Cryptocurrency, FinTech, Stock Exchanges, Trading Platform Founders: Jannick Malling, Leif Abraham, Matt Kennedy, Peter Quinn, Sean Hendelman Founding year: 2019 Total equity funding raised: $413.5M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale. Round: Series C Description: Cleerly is a digital healthcare company that offers heart disease diagnosis solutions. Founded by James K. Min in 2017, Cleerly has now raised a total of $386.5M in total equity funding and is backed by Novartis, Fidelity, Insight Partners, T. Rowe Price, and Sands Capital Ventures. Investors in the round: Battery Ventures, Insight Partners Industry: Apps, Artificial Intelligence (AI), Health Care, Medical, Wellness Founders: James K. Min Total equity funding raised: $386.5M The AlleyWatch audience is driving progress and innovation on a global scale. With its regional media properties, AlleyWatch serves as the highway for technology and entrepreneurship. There are a number of options to reach this audience of the world’s most innovative organizations and startups at scale including developing prominent brand placement, driving demand generation, and building thought leadership among the vast majority of key decision-makers in the New York business community and beyond. Learn more about advertising to NYC Tech at scale.
Stainless Frequently Asked Questions (FAQ)
When was Stainless founded?
Stainless was founded in 2022.
Where is Stainless's headquarters?
Stainless's headquarters is located at 180 Varick Street, New York.
What is Stainless's latest funding round?
Stainless's latest funding round is Series A.
How much did Stainless raise?
Stainless raised a total of $27.5M.
Who are the investors of Stainless?
Investors of Stainless include The General Partnership, Zapier, Sequoia Biotech, Felicis, Andreessen Horowitz and 9 more.
Who are Stainless's competitors?
Competitors of Stainless include Apideck and 8 more.
What products does Stainless offer?
Stainless's products include SDK Generation.
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Compare Stainless to Competitors
Speakeasy specializes in API development tools within the software industry. The company offers solutions for generating SDKs, API documentation, Terraform providers, and MCP servers, all built on OpenAPI specifications. These tools provide type-safe and ergonomic programming interfaces. It was founded in 2022 and is based in Covina, California.

ReadMe creates developer hubs for API documentation and support, operating within the technology and software industry. The company provides a platform for teams to document their APIs and integrate OpenAPI specifications. It allows for real-time usage analytics which can aid in developer experience and troubleshooting. ReadMe serves the technology sector, focusing on API usability. It was founded in 2014 and is based in San Francisco, California.
Fern specializes in the generation and publishing of SDKs and documentation for APIs within the software development industry. The company provides tools to create type-safe and idiomatic client libraries from OpenAPI specifications, and automated documentation that updates with API changes. Its solutions cater to developers and companies looking to streamline their API integration and documentation processes. The company was founded in 2022 and is based in New York, New York.

Postman serves as an Application Programming Interface (API) platform in the technology sector and focuses on streamlining the API development process. The company offers a suite of tools that simplify building, testing, and collaborating on APIs, making it accessible for developers and organizations to create and manage APIs efficiently. Postman primarily serves the software development industry. It was founded in 2014 and is based in San Francisco, California.

DreamFactory Software specializes in the automation of REST API generation. The company provides a platform that allows developers to create secure REST APIs from various databases and data sources without writing code. DreamFactory's solutions are utilized by sectors that require data integration and API management, such as healthcare, finance, and legal industries. It was founded in 2014 and is based in Campbell, California.
Itorix focuses on providing enterprise-grade API (Application Programming Interface) lifecycle management and improved API governance in the Information Technology (IT) sector. The company offers a platform that manages the entire API lifecycle, from design and build to testing and deployment, with features such as automated workflows, versioning, and built-in plugins. It primarily serves businesses in the IT industry that require API strategy and management. It was founded in 2018 and is based in Bellevue, Washington.
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