Name: Auth0
Rating: 5 (1 reviews)
Author: AppVibed

Auth0 Overview

Auth0 by Okta is a customer identity and access management (CIAM) platform that gives developers and product teams everything they need to add secure, scalable authentication and authorization to web, mobile, and API-driven applications. Out of the box, Auth0 delivers Universal Login, enterprise-grade Single Sign-On, MFA, passwordless options (passkeys, magic links, SMS), and machine-to-machine OAuth flows—backed by strong security controls like attack protection, breached password detection, and compliance-friendly deployment choices (including private cloud). Its extensibility is a core strength: with Actions (serverless hooks) and Forms (a no-code editor), teams can tailor signup and login experiences, inject custom logic, and orchestrate user journeys without maintaining their own auth infrastructure. Designed for startups through global enterprises, Auth0 helps engineering teams ship faster by offloading the hard parts of identity—encryption, token issuance, protocol support, and ongoing security—while providing advanced capabilities for scale: Organizations (B2B), enterprise identity providers, granular scopes and permissions, log streaming, and a 99.99% SLA on select enterprise plans. Whether you’re modernizing a B2C app, enabling B2B SSO, or securing IoT and backend services with M2M credentials, Auth0 provides a flexible platform that meets stringent security standards and adapts as your requirements evolve.

Key Features & Capabilities

Universal Login

Implement robust authentication with a hosted login page that supports password, passkeys, and social providers. Customize branding while centralizing security, updates, and protocol handling to reduce maintenance and risk.

Single Sign-On (SSO)

Enable users to authenticate once and access multiple applications via enterprise federation, social login, or username/password. Streamline user experience across your app ecosystem while maintaining centralized access controls.

Multi‑Factor Authentication (MFA) and Attack Protection

Add OTP-based and enterprise-grade factors, plus adaptive MFA as an add-on, to strengthen account security. Built-in protections like brute force defense, suspicious IP throttling, and breached password detection help prevent account takeover.

Actions (Serverless Extensibility)

Extend identity flows with JavaScript in a hosted, serverless environment—no infrastructure to manage. Use drag-and-drop flow configuration, guided validation, and type-safe definitions to integrate custom logic and third-party services.

Machine-to-Machine (M2M) Authorization

Secure non-interactive clients (CLIs, daemons, backends, IoT) with OAuth2 client credentials. Apply granular scopes and permissions so services only access the APIs they need, improving least-privilege enforcement.

Pricing Plans

Free

Up to 25,000 Monthly Active Users (MAU)
Email/username/phone password auth + passkeys
Social login (e.g., Google, Facebook)
5 Organizations (B2B)
Configurable branded forms (login, signup)
Actions for custom logic (JavaScript)
Basic Attack Protection
Community support
Custom domain (credit card verification required)
Log retention: 1 day

Essentials

$35/month (reference pricing)

Up to 500 MAU included (higher MAU available via plan selection)
All Free features
Relaxed rate limits for end-user auth & API requests
Passwordless via Magic Link & SMS
Role-Based Access Control (RBAC)
10 Organizations
Security log streaming to Datadog, Splunk, AWS, Azure
Higher quotas across platform features
Separate production and development environments
Standard Support
Machine-to-Machine Authentication quota: 1,000
Log retention: 5 days

Professional

$240/month (reference pricing)

Up to 1,000 MAU included (higher MAU available via plan selection)
All Essentials features
Use existing user database for login
MFA (including one-time passwords)
Advanced Attack Protection
Enterprise MFA factors
Service authorization add-on
M2M add-on available; M2M quota typically higher (e.g., 5,000)
More tenants and admin roles (up to 6 tenants; Admin/Viewer/Editor)
Log retention: 10 days

Enterprise

Custom pricing

All Professional features
Custom user and SSO tiers
99.99% uptime SLA
Higher rate limits than other plans
Enterprise management & support (Premier Success options)
Advanced security features (add-ons available)
Private Deployment on AWS (add-on)
Tenant Access Control List (ACL) with add-on allowance
Unlimited tenants (system limits may apply)
Log retention: 30 days
Enterprise Connections and Self‑Service SSO on select plans

Monthly and annual billing options are available. Free trial is 22 days, then the Starter/Free plan activates automatically. Startup and Nonprofit programs offer special pricing/benefits. Some capabilities are add-ons (e.g., Adaptive MFA, Bot Detection, HIPAA/BAA, Private Deployment, Fine-Grained Authorization, M2M add-on).

Pros & Cons

Pros

Strong security posture out of the box: hashed and salted passwords (bcrypt), A+ TLS rating, attack protection, and breached password detection
Highly extensible identity flows with Actions (serverless JS) and no‑code Forms to tailor signup/login UX quickly
Broad auth coverage: passwordless (magic link/SMS), passkeys, social login, and enterprise federation to fit diverse use cases
Enterprise readiness: Private Cloud deployment, 99.99% SLA, advanced rate limits, and compliance-oriented options (HIPAA/BAA add-on, FAPI profile)
Robust API and M2M support with granular scopes/permissions for backends, CLIs, daemons, and IoT

Cons

×Lower-tier quotas and observability limits (e.g., 1–10 days log retention) can be restrictive for audit-heavy teams
×Advanced capabilities like Adaptive MFA, Bot Detection, HIPAA/BAA, and Private Deployment require paid add-ons
×Free plan capped at 25,000 MAU; larger-scale production use typically requires a paid plan
×Organizations, M2M quotas, and some enterprise SSO options are limited or reserved for higher tiers
×Custom domains on Free require credit card verification, creating extra friction for some teams

Frequently Asked Questions

Why do so many companies trust Auth0 for login?

Auth0 prioritizes security: passwords are never stored in plain text and are salted and hashed with bcrypt; TLS implementation scores A+ on SSL Labs. Built-in protections include breached password detection and brute-force/bot defenses, plus proactive monitoring and mitigation. See the Auth0 Security page for details.

What happens to our data if we stop using Auth0?

Your data remains secure while hosted. You can export via the User Import/Export extension in the dashboard or use the Auth0 Management API to retrieve data in the formats you need.

If my Free plan exceeds 25,000 MAU, do I need to upgrade?

Yes. When you surpass 25,000 MAU, choose a paid plan with an appropriate MAU tier. Paid plans support from 1,000 up to 100,000+ MAU via custom tiers and include more features.

What deployment models does Auth0 support?

Auth0 can run in Public Cloud (multi-tenant) or isolated Private Cloud options: Private Cloud Basic, Private Cloud Performance (higher RPS and options like update control and GEO-HA), and Private Cloud Performance Plus (up to ~1,500 RPS).

Where can I check Auth0 status and uptime?

Visit https://status.auth0.com/ for current and historical system status and monthly uptime, and see uptime reports at http://uptime.auth0.com/.

How long is the free trial?

The free trial lasts 22 days. After that, the Starter/Free plan is automatically activated. Choose a paid plan to continue using premium features.

Do you offer startup or nonprofit pricing?

Yes. Startups can apply for special benefits (e.g., up to 100k MAU, enterprise ID providers, Pro MFA & password protection, Auth0 SSO, dashboard access for one year, plus optional AWS credits). Nonprofits can apply via the Social Impact program for discounts.

Auth0

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