
Auth0
Keycloak
Clerk
AuthKit
Hanko
PropelAuth
ZITADEL
Open-source Auth0/Clerk Alternative

Managed Hosting for developers, entrepreneurs, and businesses like yours

Which is more popular?
Based on our record, Stack Auth seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | stack-auth.com | opalstack.com |
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What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Stack Auth yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
W18D3 C3: Full Stack Auth Review: User/Computer Order & Developer Build Order
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Stack Auth and Opalstack. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Five minutes. That's how long Stack Auth takes to set up. - Source: dev.to / 10 months ago
Stack Auth (S24) | San Francisco, CA | Full-time Hiring founding & design engineers! We're building the customer platform for developers — think of a single service that does auth, payments, analytics, marketing emails, and so much more.... - Source: Hacker News / about 1 year ago
StackAuth is an open-source authentication and user management platform designed to integrate seamlessly into Next.js projects. Its combination of frontend/backend APIs and pre-built UI components dramatically simplifies the integration... - Source: dev.to / almost 2 years ago
Tracking Opalstack since Sep 2023.
When comparing Stack Auth and Opalstack, you can also consider the following products.

Auth0 is a program for people to get authentication and authorization services for their own business use.
Compare Auth0 to Stack Auth or Opalstack:

Open Source Identity and Access Management for modern Applications and Services.
Compare Keycloak to Stack Auth or Opalstack:

Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.
Compare Clerk to Stack Auth or Opalstack:

The world's best login box, powered by WorkOS + Radix.
Compare AuthKit to Stack Auth or Opalstack:


PropelAuth hosts and manages your authentication.
Compare PropelAuth to Stack Auth or Opalstack: