Software Alternatives, Accelerators & Startups

FusionAuth VS Auth0

Compare FusionAuth VS Auth0 and see what are their differences

FusionAuth logo FusionAuth

FusionAuth is a CIAM platform that is 100% free for unlimited users.

Auth0 logo Auth0

Auth0 is a program for people to get authentication and authorization services for their own business use.
  • FusionAuth Landing page
    Landing page //
    2023-02-10

FusionAuth adds authentication, authorization, user management, reporting, analytics and much more in minutes not months.

  • Auth0 Landing page
    Landing page //
    2024-05-30

FusionAuth features and specs

  • Comprehensive Feature Set
    FusionAuth provides a wide range of authentication and authorization features including OAuth, SSO, MFA, social login, and user management.
  • Developer Friendly
    FusionAuth offers extensive documentation, APIs, and SDKs that make it easy for developers to integrate and customize.
  • Self-Hosted and SaaS Options
    FusionAuth can be deployed on-premises or accessed as a cloud service, providing flexibility based on organizational needs.
  • Scalable
    FusionAuth is designed to handle millions of users, making it suitable for both small-scale and enterprise-grade applications.
  • Good Community Support
    There is a vibrant community and responsive support team that can help with troubleshooting and advice.
  • Free Tier
    FusionAuth offers a free version that includes a substantial set of features, which is beneficial for startups and small projects.

Possible disadvantages of FusionAuth

  • Complex Initial Setup
    The initial configuration and setup can be complex and time-consuming, particularly for users who are not familiar with authentication systems.
  • Cost
    While there is a free tier, the advanced features and higher usage plans can become costly for larger applications.
  • Resource Intensive
    Self-hosting FusionAuth may require significant server resources, which can be a drawback for smaller organizations.
  • Learning Curve
    Given its comprehensive feature set, there can be a steep learning curve for new users to fully leverage all the capabilities.
  • Limited Customization for SaaS
    The SaaS version may have limitations in customization and control compared to the self-hosted option.

Auth0 features and specs

  • Ease of Use
    Auth0 provides an intuitive dashboard and extensive documentation, making it easy for developers to implement authentication and authorization in their applications.
  • Security
    Auth0 offers robust security features such as multi-factor authentication, anomaly detection, and brute-force protection to ensure the safety of user data.
  • Scalability
    Being a cloud-based service, Auth0 easily scales with growing application demands, accommodating increasing numbers of users and higher authentication requests.
  • Customization
    Auth0 allows for a high degree of customization in authentication workflows, including custom login pages, rules, and hooks that tailor the service to specific application needs.
  • Integrations
    Auth0 supports a wide variety of integrations with social identity providers, enterprise systems, and custom databases, making it versatile for different use cases.
  • Compliance
    Auth0 complies with various industry standards and regulations such as GDPR, HIPAA, and SOC2, providing assurance for businesses operating in regulated environments.

Possible disadvantages of Auth0

  • Cost
    Auth0 can be expensive for smaller projects or startups as the pricing scales with the number of active users and advanced features, potentially becoming cost-prohibitive.
  • Complexity for Simple Use Cases
    For simple authentication needs, Auth0 might be overkill, offering more features and configurations than necessary, making it potentially cumbersome.
  • Vendor Lock-in
    Relying on Auth0 means dependency on a third-party provider for critical authentication infrastructure, which can be a risk if service terms change or if there are service outages.
  • Learning Curve
    While the extensive features of Auth0 are a strength, they also mean that there is a learning curve, especially for developers who are new to identity and access management.
  • Performance
    There can be occasional performance issues or latency, particularly during peak times or depending on geographic location, which might affect user experience.
  • Limited Free Tier
    The free tier of Auth0 is limited in terms of the number of active users and features, which might not be sufficient for some projects to adequately test the platform.

FusionAuth videos

Replicating StackOverflow login with FusionAuth

More videos:

  • Demo - FusionAuth Demo

Auth0 videos

GraphQL, Hasura, Apollo, and Auth0 for Vuejs developers by Devlin Duldulao

More videos:

  • Review - Auth0: Identity Made Simple for Developers
  • Review - Easy Secure APIs with LoopBack and Auth0

Category Popularity

0-100% (relative to FusionAuth and Auth0)
SSO
16 16%
84% 84
Identity And Access Management
Identity Provider
12 12%
88% 88
Authentication
100 100%
0% 0

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare FusionAuth and Auth0

FusionAuth Reviews

10 Best Auth0 Alternatives and Similar Platforms
Like Auth0, FusionAuth is a powerful user management solution with a lot more to offer. Getting started and setting up FusionAuth takes no time because it is compatible with databases, such as Java and C#.
IAM: A comparison of open-source tools
/ Digitalberry news / IAM: A comparison of open-source toolsIAM: A comparison of open-source toolsWhy use an Identity Provider (IdP)?Comparative study of Identity Providers (IdP)1. Our team’s first choice: Keycloak2. In second place of our comparative study: Gluu3. Special mention: FusionAuthDiscover our expertiseContact our experts
Auth0 and FusionAuth: A Tale of Two Solutions
One of the biggest differences between Auth0 and FusionAuth is cost. FusionAuth is free for unlimited users. No strings, gimmicks, or tricks. No cost increases when you hit a certain Monthly Active User threshold. Much like a database or a web server, secure authentication is so essential that developers should be able to implement it quickly and easily without cost...
Source: fusionauth.io

Auth0 Reviews

Top 7 Firebase Alternatives for App Development in 2024
Auth0 is an excellent choice for projects requiring advanced authentication features and enterprise-grade security.
Source: signoz.io
Top 10 Best SAML Identity Providers List for SSO (Pros and Cons)
Launched in 2013, Auth0 is a product unit under Okta. One of the reliable SaaS solutions to take a modern approach to application authentication and identity management. With Auth0, IT admins can connect any application and define its integrations and external identity providers to be used.
12 User Authentication Platforms [Auth0, Firebase Alternatives]
But since user data is a lot more serious than wasting a pepperoni pizza, let’s check out some user authentication platforms. And while an average business person will straightaway run towards Auth0 or Firebase, there are others as well.
Source: geekflare.com
Top 11 Identity & Access Management Tools
If you are already using a major cloud platform like Azure, Google Cloud, or AWS, you should probably start by seeing if their solutions meet your needs. If you’re developing an application, something like Auth0 might be the best choice.
Source: spectralops.io
Best identity access management software 2022
Auth0, founded in 2013 and acquired by Okta in May 2021 for $6.5 billion, is a respected alternative for developers who want to create a secure login experience for their personal applications. It is a next-gen identity management platform for web, mobile, IoT, and internal applications.
Source: www.zdnet.com

Social recommendations and mentions

Based on our record, Auth0 should be more popular than FusionAuth. It has been mentiond 193 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

FusionAuth mentions (30)

  • Launch HN: Stack Auth (YC S24) – An Open-Source Auth0/Clerk Alternative
    As someone who came from Auth0 and god-awful Amazon Cognito, we've been using FusionAuth for years. Their APIs and SDKs have been amazing to work with. https://fusionauth.io It does what Auth0 does but significantly more cheaper and you can also self-host if you want. I built the Pulimi plugin for it which helps us easily configure it. If you don't use Terraform or Pulumi, they have this really cool kickstart... - Source: Hacker News / 9 months ago
  • Top 6 Open Source Identity and Access Management (IAM) Solutions For Enterprises
    FusionAuth is one of the most decorated and successful open-source IAM solutions. It has been downloaded by more than 10 million customers and hosts over 1 million digital identities. - Source: dev.to / about 1 year ago
  • Evolutive and robust password hashing using PBKDF2 in .NET
    Ideally, I would recommend not handling and storing passwords yourself. It is preferable to use an identity provider (IdP), such as Azure AD B2C, Auth0, or FusionAuth. These systems are designed to manage your users' identity (including their passwords) so you don't have to. You could also use Single Sign-On with cloud providers. - Source: dev.to / over 1 year ago
  • Ask HN: Who is hiring? (August 2023)
    FusionAuth | Senior Java Engineer, Senior TechOps Engineer, Senior Support Engineer | Full-time | Denver CO, USA | https://fusionauth.io FusionAuth is the authentication and authorization platform built for devs, by devs. Our software solves the problem of integrating essential user security without adding risk or distracting from the primary application. Ya know, the one with the features your users want to pay... - Source: Hacker News / over 1 year ago
  • SSO yet again - Authentik / Authelia / FusionAuth / Teleport / etc.
    But I rarely see a comprehensive comparison that is current for any of them. And then there are others out there like Teleport and FusionAuth. Source: almost 2 years ago
View more

Auth0 mentions (193)

View more

What are some alternatives?

When comparing FusionAuth and Auth0, you can also consider the following products

Keycloak - Open Source Identity and Access Management for modern Applications and Services.

Okta - Enterprise-grade identity management for all your apps, users & devices

OneLogin - On-demand SSO, directory integration, user provisioning and more

Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.

LoginRadius - Loginradius is a cloud-based customer identity and access management platform. LoginRadius empowers businesses to deliver a delightful customer experience without compromising security.

Microsoft Azure Active Directory - Azure Active Directory is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups and help secure access to applications including Microsoft online services like Office 365 …