Replacement Guide

How to Build Your Own Auth0

Replace Auth0 with a custom build. Secure AI Agent & User Authentication

Few Days
73 features8 integrations3-5 days

Estimated Timeline

Based on 73 features at Few Days difficulty, expect about 3-5 days with AI-assisted development.

1
Architecture & setup
Half day
2
Core features
2-3 days
3
Testing & polish
1 day

Recommended Tech Stack

Next.js 14

Full-stack React framework with API routes and server components

Supabase

PostgreSQL database, auth, and real-time subscriptions

Tailwind CSS

Utility-first styling for rapid UI development

Key Features to Replicate

Top features across 8 categories. See all 73 features

Authentication(14 features)

Client Initiated Backchannel Authentication (CIBA)Premium

Enable agent or app initiated user authentication via out-of-band notification channels

Cross-App SSO

Enable single sign-on across multiple applications and services

Embedded LoginPremium

Embed authentication directly into your application interface

Home Realm DiscoveryPremium

Automatically route users to the correct identity provider based on their email domain

Long-Lived SessionsPremium

Support persistent sessions that last longer than standard session durations

+9 more in this category

Security(10 features)

Adaptive MFAPremium

Dynamic multi-factor authentication triggered only on suspicious login attempts

Attack ProtectionPremium

Keep users and services safe from password leaks, intruders, and scripted attacks with basic and enhanced protection

Bot DetectionAIPremium

Detect and prevent automated bot attacks from accessing your application

Breached Password DetectionPremium

Detect and protect users when credentials are leaked from external sources

Brute Force Protection

Protect against repeated login attempts and brute force attacks

+5 more in this category

Compliance(8 features)

FAPI CertificationPremium

Financial-grade API (FAPI) certified for highly regulated environments

HIPAA BAAPremium

HIPAA compliance with Business Associate Agreement for healthcare applications

Log RetentionPremium

Retain authentication and authorization logs for auditing and compliance

Log StreamingPremium

Stream Auth0 audit logs to Datadog, Splunk, AWS, Azure, and other platforms

PCI CompliancePremium

PCI compliant environments for payment card industry standards

+3 more in this category

User Management(8 features)

Account LinkingPremium

Link multiple user accounts together for unified user management

Auth0 Database Connection

Use Auth0's built-in user database for authentication

Custom AttributesPremium

Add custom metadata and attributes to user profiles

Inbound SCIM

Receive user provisioning updates from external SCIM providers

OrganizationsPremium

Model and manage multiple customer organizations within your application

+3 more in this category

Administration(6 features)

Admin Access ControlsPremium

Define granular admin roles (Admin, Viewer, Editor) with different permission levels

Admin Dashboard

Comprehensive dashboard for managing Auth0 configuration and users

Dashboard SSOPremium

Enable single sign-on for the Auth0 dashboard itself

Delegated AdminPremium

Allow customers to manage their own users and settings

Express ConfigurationPremium

Quick setup wizard for rapid Auth0 configuration

+1 more in this category

Customization(6 features)

Auth0 FormsPremium

Create and customize authentication forms without code

Brand Customization

Customize the login experience with your brand colors, logos, and messaging

Configurable Login Experience

Configure every aspect of the login user interface

Custom Domains

Use your own custom domain for authentication pages

Customize Signup & Login

Customize the entire signup and login process with APIs and Forms

+1 more in this category

Authorization(4 features)

Async AuthorizationPremium

Asynchronous authorization capabilities for complex workflows

Fine-Grained Authorization (FGA)AIPremium

Apply fine-grained authorization directly to RAG pipelines and enable user collaboration with granular access control

Role-Based Access Control (RBAC)Premium

Define and enforce role-based permissions for users

Tenant Access Control List (ACL)Premium

Create and manage rules that control access to your app with allow, block, or redirect options

Infrastructure(4 features)

Private Cloud BasicPremium

Dedicated private cloud deployment for data residency needs

Private Cloud PerformancePremium

High-performance private cloud deployment with 500 RPS and upgrade control

Private Cloud Performance PlusPremium

Maximum performance private cloud with 1,500 RPS and GEO-HA options

Private DeploymentPremium

Dedicated Auth0 deployment for enhanced performance, security, and compliance

Cost Calculator

Keep Paying Auth0

Monthly$35/mo
Yearly$420/yr
5-Year Total$2.1k

Build It Yourself

Est. Build Time~8 hrs
Hosting$20/mo
DifficultyEasy

Total Cost Comparison

1 YearSave $180
SaaS
$420
DIY
$240
3 YearsSave $540
SaaS
$1.3k
DIY
$720
5 YearsSave $900
SaaS
$2.1k
DIY
$1.2k

DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 73 features at easy complexity.

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