When was Stack founded?

Stack was founded in 2024 and raised its 1st funding round within a year of its incorporation.

Where is Stack located?

Stack is headquartered in Zurich, Switzerland.

How many employees does Stack have?

As of Mar 31, 2026, the latest employee count at Stack is 6.

Is Stack a funded company?

Stack is a funded company, having raised a total of $***** in its 1st and only funding round, a Seed round on 2024.

When was the latest funding round of Stack?

Stack's latest funding was a $***** Seed round on 2024, with participation from 1 investor.

Where does Stack rank among its competitors?

Stack ranks 49th amongst 59 active competitors, of which 14 are funded. It stands 9th in terms of total funding among its competitors. The most recent competitor to raise funding was Clerk, which secured $50M in Jun, 2025.

Who are the top competitors of Stack?

Stack's top competitors include Authzed, Trinsic and CyberQP. Among them, Clerk secured the most recent funding round in June, 2025.

Stack - 2026 Company Profile, Team, Funding & Competitors

Stack is a seed company based in Zurich (Switzerland), founded in 2024 by Zai Shi and Konstantin Wohlwend. It operates as an Open source based authentication and user management solution. Stack has raised $500K in funding. The company has 59 active competitors, including 14 funded and 3 that have exited. Its top competitors include companies like Authzed, Trinsic and CyberQP.

Company Details

Open source based authentication and user management solution. It is an authentication tool for web apps. The platform provides user management services and streamlines authentication processes for developers. It allows developers to manage users, providers, roles, permissions, and APIs.

Website: stack-auth.com
Email ID: *****@stack-auth.com

Key Metrics

Founded Year

2024

Location

Zurich, Switzerland

Stage

Seed

Total Funding

$500K in 1 round

Latest Funding Round

Seed, 2024, $*****

Investors

Y Combinator

Ranked

49^th among 59 active competitors

Employee Count

6 as on Mar 31, 2026

Similar Companies

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View Stack's full profile

Stack has raised a total funding of $500K over 1 round. Its latest funding round was a Seed round on 2024 for $*****. 1 investor participated in its latest round. Stack has 1 institutional investor.

Here is the list of recent funding rounds of Stack:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
2024	5984	Seed	7836	3499	8104	9599

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View details of Stack's funding rounds and investors

The founders of Stack are Zai Shi and Konstantin Wohlwend.

Here are the details of Stack's key team members:

Zai Shi: Co-Founder of Stack.
Konstantin Wohlwend: Co-Founder of Stack.

View details of Stack's Founder profiles and Board Members

Stack's employee count trend

Stack has 6 employees as of Mar 26. Here is Stack's employee count trend over the years:

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Top competitors of Stack include Authzed, Trinsic and CyberQP. Here is the list of Top 10 competitors of Stack, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Authzed 2010, New York City (United States), Series A	Developer of authorization infrastructure designed to simplify permission management and access control	$15.9M	General Catalyst, Amplify Partners & 3 others	57/100
2nd	Trinsic 2020, New York City (United States), Seed	Cloud based platform for credential verification and monitoring	$9.12M	Kickstart Seed Fund, Georgian & 12 others	52/100
3rd	CyberQP 2018, Vancouver (Canada), Series A	Privileged access management solution	$19M	Canadian Imperial Bank of Commerce, Arthur Ventures ... Read more	52/100
4th	Clerk 2019, San Francisco (United States), Series C	Authentication and user management platform	$134M	Madrona, S28 Capital & 13 others	50/100
5th	GlobaliD 2015, Oakland (United States), Series A	User managed identity and access control solutions provider	$6M	Hard Yaka, Arbor Ventures & 3 others	45/100
6th	Scaled Access 2009, Leuven (Belgium), Acquired	Provider of cloud based authorization platform	$3.42M	Capricorn Partners, Pamica	42/100
7th	Nira 2021, Redwood City (United States), Acquired	Platform offering access control system	$5.3M	Uncommon Capital, Mischief & 11 others	41/100
8th	ObserveID 2021, Aliso Viejo (United States), Unfunded	Cloud-based identity intelligence platform	-	-	40/100
9th	Authomize 2019, Tel Aviv (Israel), Acqui-Hired	AI-based authorization management automation solution	$22M	Innovation Endeavors, Blumberg Capital & 2 others	40/100
10th	Gluu 2009, Austin (United States), Unfunded	Open-source digital identity management solutions provider	-	-	39/100
49th	Stack 2024, Zurich (Switzerland), Seed	Open source based authentication and user management solution	$500K	Y Combinator	19/100