Software Alternatives, Accelerators & Startups

Stack Auth VS ZITADEL

Compare Stack Auth VS ZITADEL and see what are their differences

Stack Auth logo Stack Auth

Open-source Auth0/Clerk Alternative

ZITADEL logo ZITADEL

The Identity Infrastructure for Modern B2B SaaS
Not present
  • ZITADEL Landing page
    Landing page //
    2022-05-17

Zitadel is the open-source alternative for identity management, built specifically to solve the complex multi-tenancy and fine-grained authorization challenges developers face today. We provide a turnkey solution that handles secure login, organization management, and audit trails so you can ship your project faster without compromising on security or user experience.

ZITADEL

$ Details
freemium $100.0 / Monthly (1'000 Daily Active Users included)
Platforms
Web
Release Date
2021 May
Startup details
Country
United States
Employees
20 - 49

Stack Auth features and specs

No features have been listed yet.

ZITADEL features and specs

  • OpenID Connect
    Certified
  • SAML2.0
  • OAuth
    Certified
  • Passkeys
  • Machine-to-machine
  • 2FA/MFA
  • LDAP
  • OTP
  • Multi-tenancy
  • SCIM

Stack Auth videos

W18D3 C3: Full Stack Auth Review: User/Computer Order & Developer Build Order

ZITADEL videos

No ZITADEL videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Stack Auth and ZITADEL)
Identity And Access Management
Identity Provider
48 48%
52% 52
SSO
100 100%
0% 0
Authentication
0 0%
100% 100

User comments

Share your experience with using Stack Auth and ZITADEL. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, ZITADEL should be more popular than Stack Auth. It has been mentiond 19 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Stack Auth mentions (4)

  • I Tested 7 Open Source Clerk Alternatives for Full-Stack Developers
    Five minutes. That's how long Stack Auth takes to set up. - Source: dev.to / 8 months ago
  • Ask HN: Who is hiring? (September 2025)
    Stack Auth (S24) | San Francisco, CA | Full-time Hiring founding & design engineers! We're building the customer platform for developers โ€” think of a single service that does auth, payments, analytics, marketing emails, and so much more. We're selling to developers & startups so our audience is right here on this website! If you're in San Francisco and frequent Hacker News, that's enough of a reason to DM me on... - Source: Hacker News / 11 months ago
  • Building Multi-Tenant Apps Using StackAuth's "Teams" and Next.js
    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 of such capabilities into your application. Similarly, its newer "Teams" feature provides an excellent starting point for creating multi-tenant applications. In this post, we'll... - Source: dev.to / over 1 year ago
  • Stack Auth (YC S24), the open-source Auth0 alternative, is hiring Founding SWEs
    Hi HN! We're building Stack Auth (https://stack-auth.com/), an open-source managed authentication and authorization platform. Basically, we build your login and signup pages, and everything that comes with that. You can find our customer pitch elsewhere, so instead I'll tell you more about us and the company. We are developers building for other developers, so you can think of... - Source: Hacker News / over 1 year ago

ZITADEL mentions (19)

  • Zitadel Has a Free API: Self-Hosted Identity and Auth That Replaces Auth0
    Zitadel is an open-source identity management platform โ€” a self-hosted alternative to Auth0, Okta, and Firebase Auth. It provides authentication, authorization, and user management with a comprehensive API. - Source: dev.to / 4 months ago
  • Show HN: Tesseral โ€“ Open-Source Auth
    Looks nice, we've been using https://zitadel.com/ and the journey to mutli-tennancy was fairly straight forward. - Source: Hacker News / about 1 year ago
  • Launch HN: Fortress (YC S24) โ€“ Database platform for multi-tenant SaaS
    If you prefer an open source, and maybe more mature, alternative for multi tenant/b2b auth then have a look at https://zitadel.com (disclosure: work for zitadel). - Source: Hacker News / almost 2 years ago
  • Identity: Self-Hosted or in the Cloud?
    Less known and less complete, but simpler and lighter than keycloak there is zitadel https://zitadel.com/ You can of course self host it. - Source: Hacker News / about 2 years ago
  • A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev
    ZITADEL Cloud โ€” A turnkey user and access management that works for you and supports multi-tenant (B2B) use cases. Free for up to 25,000 authenticated requests, with all security features (no paywall for OTP, Passwordless, Policies, and so on). - Source: dev.to / over 2 years ago
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What are some alternatives?

When comparing Stack Auth and ZITADEL, you can also consider the following products

Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.

Keycloak - Open Source Identity and Access Management for modern Applications and Services.

Clerk - Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.

authentik - authentik is an open-source identity provider focused on flexibility and versatility.

AuthKit - The world's best login box, powered by WorkOS + Radix.

Okta - Enterprise-grade identity management for all your apps, users & devices