Dev tools · alternatives · 2026
24 alternatives to Stack Auth (YC S24)
Open-source Auth0/Clerk alternative
Stack Auth is an open-source authentication and authorization platform designed as an alternative to Auth0 and Clerk. Aimed at developers, it offers managed user authentication with pre-built components that can be… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Stack Auth (YC S24) launched in 2024; newer entries below may have overtaken it.
- 1
Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like and that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!
2024 · stack-auth.com · its alternatives →
- 2CA
The task came with a sense of helplessness. We knew what "great" looked like, but it was impractical to build all of that functionality.
2021 · clerk.dev · its alternatives →
- 3
Clerk▲280Authentication and user management for React and Next.js
2021 · clerk.com · its alternatives →
- 4OS
I’m Rishabh and the co-founder and CTO at https://supertokens.com (YC S20). We offer open-source user authentication and we just released our user roles product for companies implementing authorization. Our users are web developers, and a prominent and adjacent pain point for our users is authorization. Developers typically implement two independent solutions for authentication and authorization. Offering AuthN and AuthZ in a single solution is something we’ve been thinking about for the last few years. Quick primer, authentication is knowing who the user is, and authorization is…
2022 · its alternatives →
- 5
StackPatch▲116Patch authentication into your Next.js app with one command
Jan 2026 · its alternatives →
- 6
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
2023 · github.com · its alternatives →
- 7
The world's best login box, powered by WorkOS + Radix.
2023 · authkit.com · its alternatives →
- 8
- 9
Authorizer▲296Open source authentication and authorization solution
2021 · authorizer.dev · its alternatives →
- 10
Simple and opinionated OpenID Connect server designed for self-hosters - lastlogin-net/obligator
2023 · github.com · its alternatives →
- 11
- 12
Hi folks! I'm Ulysse, and Tesseral (https://github.com/tesseral-labs/tesseral) is open-source auth for B2B SaaS. Early in my career, I worked on enterprise auth and security features at Segment. I've been obsessed with the subtle details of enterprise software ever since. For example, I wrote an implementation of SAML in the early days of the COVID pandemic because I thought it was fun. Over the years, I've felt frustrated that too few people have seemed interested in making auth obvious for developers of business software. Auth really doesn't need to be so confusing. We…
2025 · github.com · its alternatives →
- 13
AuthPass▲75Simple, open source, cross platform password manager 😅️
2020 · authpass.app · its alternatives →
- 14
Hi HN, we are Deepak and Sama, co-founders of BoxyHQ (https://boxyhq.com/). BoxyHQ provides an open-source platform for developers to quickly integrate enterprise features into their software solutions. These include SAML Single Sign-On (SSO), Audit logs, with more to come :) Every B2B startup faces a common challenge when it comes to selling into the Enterprise; they need to allocate time and resources to support all the requirements to make their offering enterprise-grade. Supporting these requirements is a significant undertaking for the engineering team, especially since…
2022 · boxyhq.com · its alternatives →
- 15
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC. - logto-io/logto
2022 · github.com · its alternatives →
- 16
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
2022 · github.com · its alternatives →
- 17
- 18
Wallet auth, onboarding, and user management, made easy
2023 · thirdauth.xyz · its alternatives →
- 19
A cloud native Identity & Access Proxy / API (IAP) and Access Control Decision API that authenticates, authorizes, and mutates incoming HTTP(s) requests. Inspired by the BeyondCorp / Zero Trust white paper. Written in Go. - ory/oathkeeper
2018 · github.com · its alternatives →
- 20
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
2024 · github.com · its alternatives →
- 21
Add open source login to any Next.js and React single page app (SPA) using free open source.
2021 · ory.dev · its alternatives →
- 22
- 23
Free OSS auth without 3rd party services, deploy anywhere
2023 · wasp.sh · its alternatives →
- 24BO
Hi HN, we’re the co-founders of Bearer, and today we launch an open-source alternative to code security solutions such as Snyk Code, SonarQube, or Checkmarx. Essentially, we help security & engineering teams to discover, filter and prioritize security risks and vulnerabilities in their codebase, with a unique approach through sensitive data (PII, PD, PHI). Our website is at https://www.bearer.com and our GitHub is here: https://github.com/bearer/bearer We are not originally Security experts but have been software developers and engineering leaders for over 15…
2023 · its alternatives →
Also compare
- Stack, an open-source Clerk/Firebase Auth alternative alternatives
- Clerk – all of user management as-a-service, not just authentication alternatives
- Clerk alternatives
- Open Source Authentication and Authorization alternatives
- StackPatch alternatives
- Open-source Auth0 alternative Ory Kratos v0.13 released – nearing v1.0 alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →