Auth0
Hosted authentication with rules you can write yourself
Auth0 handles login for an application and gives you room to change how it behaves. Universal Login hosts the sign-in page, social and enterprise connections cover the identity providers a customer might arrive with, and Actions run your own code at points in the flow - after a login, before a token is issued - which is what teams reach for when the requirement is not standard. It covers both directions: consumer sign-up at volume, and B2B where each customer organisation needs its own SSO connection, directory sync and roles. Attack protection, breached password detection and multi-factor sit on top. It is part of Okta. The free tier is unusually large at 25,000 monthly active users with one enterprise connection; paid plans add features rather than raw volume, and are quoted here at 500 monthly active users since the price scales with that number.
- Universal Login hosts the sign-in page for you
- Social and enterprise identity connections
- Actions run your own code inside the login flow
- Organizations for B2B customers with their own SSO
- Self-service SSO and SCIM directory sync
- Multi-factor authentication and attack protection
- Breached password detection
- 25,000 monthly active users on the free tier
Based on what people have said
Every answer links back to the mentions it came fromHow does Auth0 compare to self-hosted alternatives like Keycloak?
Opinions are divided; some users prefer Auth0 because they find managing Keycloak to be difficult, while others are actively migrating away from Auth0 toward Keycloak to gain more control.
2 mentions · r/sysadmin · Aug 2026
What are the common concerns regarding Auth0 pricing?
Some users find the cost of enterprise features, such as SAML support for B2B customers, to be high, noting that professional plans can start at several hundred dollars per month.
1 mention · @EchoGit42 · Sep 2026
Is Auth0 considered a viable option for B2B and enterprise authentication?
Yes, it is frequently listed alongside other authentication providers for application stacks and is used to handle requirements like SAML and branded login experiences.
3 mentions · r/dotnetMAUI · r/SideProject · r/sysadmin · Aug 2026 – Sep 2026
Are there alternatives that users suggest for those looking to move away from Auth0?
Some users have suggested migrating to platforms like WorkOS when looking for alternatives to Auth0.
1 mention · @initjean · Aug 2026
These summarise counts and dates only. Read the quotes themselves under what people are saying.
What people are saying about Auth0
47% neutral“for you that might be simpler pricing for sms 2fa in australia compared to auth0, or a dead-easy setup for teams who hate their current provider's dashboard, or something else entirely.”
“So I can't tell you why anyone would pick us over Auth0 or Clerk, which is probably the real problem, not the outreach.”
“Has anyone outside your own product integrated SentinelAuth yet, and if so, what made them choose it over Auth0, Firebase, Clerk, or their current stack?”
“\- Auth pricing is attractive vs Clerk/Auth0 at scale”
“Handling custom authentication flows and Multi-Factor Authentication (MFA) in Strapi often means either hacking around `strapi/plugin-users-permissions` or wiring up external services like Auth0.”
“The practical bit: you don't have to replace your identity provider to try this. minidauth is a small open source service that sits beside Cognito, Clerk, Supabase, Auth0 and so on. It's been added to forks of Formbricks and Twenty, if you want to see it in a real codebase.”
“But I’ve used auth0 or cognito for every other project. Zero regrets.”
“Not at all lol, Auth0 is just one of many ways of verifying accounts. Think of it like Google giving you access to Docs, Sheets, YouTube, etc. with one account. You can now access all WotC things with one account.”
“Auth0 doesn't provide identify verification, so no.”
“Just got an email saying that Wizards is now going to use Auth0 for accounts which provides identity verification...is this how they finally kill scalping?”
“We migrated off Auth0 for exactly this reason on the machine-to-machine side, kept them for the interactive login flows because the drop-in UI saved a quarter of engineering time.”
“I would never want Stripe "owning" my user list, nor Auth0 "owning" my payments activity. Replace those vendors with any service or tool you want and my answer would be the same.”
“Given that they use Auth0 for authentication, turning on any of those (or Authenticator app support) is pretty trivial.”
“It is possibly they're not handling the auth and auth in house and are instead using a 3rd party (firebase, auth0, whatever...) that handles that and the it just takes tokens back. But I agree it is an underwhelming, at best, response.”
“We looked at Auth0 but was crazy expensive. We ended up going with Keycloak.”
“Sí, el precio de Auth0 puede doler bastante cuando el proyecto empieza a crecer.”
“But I still cannot find the right setup for the zero trust, to avoid anyone guessing my tunnel url, I have a google auth0 policy, and for the certificate a bypass, but still I cannot make it work .”
“Auth0 alternatives? Wondering what people are using instead of Auth0 for service account or within program api authentication? Their billing is killing us”
“Interested in what you are using behind the scenes - I am doing a major update on my app, Tripperist, and have and am using OSM / Mapsui, Auth0 for Authentication, Postgresql / GIS for mapping database.”
“If you get any of the issues above you have to add the domain, auth0 or googleusercontent into the Allowlist. You're basically stuck waiting on who ever maintains the definitions for it to update it.”
“Need SAML for the first enterprise customer and B2B Professional starts at $800/mo — that’s Auth0’s own pricing page, checked 2 Sep”
“Options right now: Next.js / TanStack Start / React+Vite, Neon / Supabase / PlanetScale / Turso / MongoDB, Drizzle / Prisma / Mongoose, Better Auth / Clerk / Auth0 / Supabase Auth / Neon Auth, Stripe, Resend / Mailgun / Brevo.”
“why don't they just use Astra to move migrate from Auth0 to something better, e.g. WorkOS???”
“Nothing about that tenant ships in the product; self-hosted installs point at their own IdP (Keycloak, Okta, Entra ID, Auth0, whatever), or just use the built-in local auth, which is the default.”
“3) You can use Auth0 to authenticate *to* other applications, and you can also use other applications to authenticate *into* Auth0.”