DEV Community: Arshak Ahamed

Auth0 vs Keycloak: What They Don’t Tell You (and When to Choose One Over the Other)

Arshak Ahamed — Tue, 06 May 2025 07:28:30 +0000

Auth0 vs Keycloak: What They Don’t Tell You (and When to Choose One Over the Other)

There’s no shortage of options when it comes to authentication — but let’s be honest: most of us end up Googling “auth for SaaS” and picking either Auth0 or Keycloak.

I’ve worked with both. And depending on where you're at in your product journey, either one could be the right choice — or the wrong one.

Let’s break it down, minus the fluff.

Auth0: Quick, Polished, Expensive

Auth0 is perfect if:

You want zero setup
You need a hosted solution with docs and UI
You’re okay paying a premium for convenience

Auth0 shines for early-stage teams who just want to move fast and not worry about token lifespans or identity providers.

But here’s the catch:

You hit pricing walls fast
Social logins, RBAC, custom claims = $$$
Migrating away is painful
Limited flexibility (especially if you need something non-standard)

I’ve seen teams paying $800/month for Auth0 before hitting 10k users.

Keycloak: Free, Powerful, Intimidating

Keycloak is great if:

You want full control and zero vendor lock-in
You’re building something that needs custom logic, SSO, or integrations
You’re okay with getting your hands dirty

Keycloak supports:

OIDC, SAML, LDAP
Social logins
Multi-tenant setups
Role-based access
User federation
Custom login themes

But here’s the reality:

The UI is confusing if you’re new
Docs are hit-or-miss
Theming is ugly out of the box
Upgrades can break things
Kubernetes deployment takes effort

When to Choose Which

Scenario	Use Auth0	Use Keycloak
MVP or early-stage SaaS	✅	❌
Need it live in 1 day	✅	❌
Tight budget / no per-user billing	❌	✅
SAML / LDAP / custom integrations	⚠️	✅
Don’t want vendor lock-in	❌	✅
Already using other open-source infra	⚠️	✅

TL;DR:

Use Auth0 to move fast.

Use Keycloak if you want control, scale, and freedom — but are ready to invest a little time upfront (or get help).

If You’re Going With Keycloak…

I help teams avoid the painful parts.

Migrations from Auth0/Okta
Clean Keycloak installs (with branding, staging, docs)
Setup for social logins, RBAC, SSO, and more
Support & handover — no mystery config

Check out 👉 https://pro.keycloakkit.com

Or just DM me if you want to chat about your setup — no pressure at all.

OAuth is hard. So I built a playground that isn’t.

Arshak Ahamed — Wed, 23 Apr 2025 09:03:32 +0000

Ever spent 30 minutes setting up Keycloak…

Just to test a login button that takes 3 seconds?

Yeah, same.

I got tired of:

Spinning up Docker
Configuring realms, users, roles, and clients
Forgetting a redirect URI (again)
Doing it all over tomorrow

So I built KeycloakKit — a one-click, disposable playground for testing auth flows without touching infrastructure.

👨‍💻 Why I Built It

I wanted to test a login — not manage an identity platform
I wanted a realm in 5 seconds, not 5 terminals
I wanted to focus on shipping, not spinning up

🧪 What KeycloakKit Does

✅ Spins up a ready-to-test Keycloak realm

✅ Comes preloaded with users, roles, clients

✅ JWT token viewer + copy support

✅ Export realm.json or Docker config

✅ Resets every 24 hours

✅ No login required

✅ Free to use → https://keycloakkit.com

🔥 Who It’s For

Frontend devs building login screens
QA teams testing user access & tokens
Backend devs prototyping OAuth flows
Solo builders & SaaS founders validating MVPs
Anyone learning how real-world auth works — without Docker

🤯 What I Learned After Launch

Posted it.

Got 17K views, 0 comments. Thought I flopped.

Then came 8 signups. Silent.

Then a DM:

“This is exactly what I needed. I’d pay for this.”

Now I know —

🧠 Devs don’t always talk. But they test.

🧠 Your Turn

If you’ve ever said:

“I just want to test this and move on.”

This was made for you.

Would love your thoughts:

What would make this a tool you’d use in every sprint?

Let’s make auth testing suck less — together.

🚀 Instantly Spin Up Keycloak Realms with KeycloakKit — No More Setup Hell

Arshak Ahamed — Mon, 21 Apr 2025 11:16:44 +0000

If you've ever worked with Keycloak, you know the pain:

Setting up a realm
Adding clients
Creating roles and users
Exporting configs manually

All just to test a simple OAuth flow? 😩

I got tired of repeating the same setup...

So I built KeycloakKit — a playground that lets you:

✅ Spin up a pre-configured Keycloak realm in seconds

✅ Includes users, roles, and clients

✅ Export realm.json or Docker Compose

✅ Auto-resets every 24 hours

✅ No login required

It's completely free, clean, and fast.

🛠 Built For Devs Who Just Want to Test Fast

Whether you're:

Testing login flows
Prototyping integrations
Teaching OAuth to your team
Showing off in a demo

KeycloakKit saves you 30+ minutes — every time.

🔗 Try it out here: https://keycloakkit.com

And if you have feedback, I'd love to hear it in the comments 👇