When was Stainless founded?

Stainless was founded in 2022 and raised its 1st funding round 2 years after it was founded.

Where is Stainless located?

Stainless is headquartered in New York City, United States.

Who is the current CEO of Stainless?

Alex Rattray of Stainless. They have also founded 1 company.

How many employees does Stainless have?

As of Jul 31, 2026, the latest employee count at Stainless is 43.

Is Stainless a funded company?

Stainless is a funded company, having raised a total of $***** in its 1st and only funding round, a Series A round on Dec 10, 2024.

When was the latest funding round of Stainless?

Stainless' latest funding was a $***** Series A round on Dec 10, 2024, with participation from 8 investors. Its primary sector is API Management. Globally, the API Management sector has seen $10.1M in funding in 2026 to date.

Where does Stainless rank among its competitors?

Stainless ranks 2nd amongst 173 active competitors, of which 12 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Stainless, which secured $25M in Dec, 2024.

Who are the top competitors of Stainless?

Stainless' top competitors include Speakeasy, Speakeasy and Fastgen. Among them, Stainless secured the most recent funding round in December, 2024.

Stainless - 2026 Company Profile, Team, Funding & Competitors

Company Details

Provider of tools generating software development kits from API specifications. These kits offer features such as typed events, built-in verification, and flexible configuration. The kits are designed to feel like handwritten code. The company offers tools that generate command line interfaces from API specifications.

Website: www.stainless.com/
Social

Key Metrics

Founded Year

2022

Location

New York City, United States

Stage

Acquired

Total Funding

$25M in 1 round

Latest Funding Round

Series A, Dec 10, 2024, $*****

Investors

Andreessen Horowitz & 7 more

Ranked

2^nd among 173 active competitors

Employee Count

43 as on Jul 31, 2026

Similar Companies

Speakeasy & 234 more

Exit Details

Acquired by Anthropic (May 18, 2026)

View Stainless' full profile

Stainless got acquired by Anthropic on May 18, 2026.

Click here to take a look at Stainless's acquisition in detail

Stainless has raised a total funding of $25M over 1 round. Its latest funding round was a Series A round on Dec 10, 2024 for $*****. 8 investors participated in its latest round. Stainless has 6 institutional investors and 2 angel investors.

Here is the list of recent funding rounds of Stainless:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Dec 10, 2024	9987916	Series A	1111863	7430692	1670549	9633503

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View details of Stainless's funding rounds and investors

The founders of Stainless are Alex Rattray, Sam Gardner and Alex Rattray. Alex Rattray is the CEO of Stainless.

Here are the details of Stainless' key team members:

Alex Rattray: Founder of Stainless.
Contact Info: 1 email address
Sam Gardner: Founder of Stainless.
Contact Info: 1 email address
Alex Rattray: Founder & CEO of Stainless.
Contact Info: 1 email address

View details of Stainless's Founder profiles and Board Members

Stainless' employee count trend

Stainless has 43 employees as of Jul 26. Here is Stainless's employee count trend over the years:

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Top competitors of Stainless include Speakeasy, Speakeasy and Fastgen. Here is the list of Top 10 competitors of Stainless, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Speakeasy 2022, Mountain View (United States), Series A	Online platform providing multi-disciplinary learning solutions	$25.9M	Google Ventures, FPV Ventures & 11 others	56/100
2nd	Stainless 2022, New York City (United States), Acquired	Provider of tools generating software development kits from API specifications	$25M	Felicis Ventures, MongoDB & 6 others	49/100
3rd	Speakeasy 2022, San Francisco (United States), Seed	Platform offering API management solution	$14.9M	Google Ventures, Quiet Capital & 4 others	45/100
4th	Fastgen 2023, Berlin (Germany), Acquired	Provider of a platform for building backends, workflows, and APIs	$500K	Y Combinator, Rainfall Ventures & 3 others	44/100
5th	API Toolz 2017, Yangon (Myanmar), Unfunded	Tool to create RESTful API without any coding.	-	-	43/100
6th	StepZen 2016, San Jose (United States), Acquired	Cloud-based API development solution provider	$8M	Wing Venture Capital, Neotribe	43/100
7th	ReadMe 2015, San Francisco (United States), Series A	Documentation and digital transaction management software	$9M	Eight Roads Ventures, Accel & 10 others	41/100
8th	Platformatic 2022, San Francisco (United States), Seed	API development software for developers	$7.8M	Decibel, Rialto & 8 others	38/100
9th	Form.io 2015, Dallas (United States), Seed	Self-hosted platform for forms, APIs, and data management	$656K	-	38/100
10th	BuildShip 2023, San Francisco (United States), Unfunded	Developer of a visual builder for AI workflows and backend APIs	-	-	38/100