Software Alternatives, Accelerators & Startups

Auth.js VS Supabase

Compare Auth.js VS Supabase and see what are their differences

Auth.js logo Auth.js

Authentication for the Web.

Supabase logo Supabase

An open source Firebase alternative
  • Auth.js Landing page
    Landing page //
    2024-05-30
  • Supabase Landing page
    Landing page //
    2023-05-27

Auth.js features and specs

  • Ease of Integration
    Auth.js is designed to be easily integrable into modern web applications, allowing developers to quickly add authentication features without significant overhead.
  • Extensive Provider Support
    The library supports a wide range of authentication providers and strategies, making it flexible for various use cases.
  • Open Source
    Being open source, Auth.js allows developers to inspect, contribute to, and customize the code to suit their needs.
  • Community and Documentation
    Auth.js has a supportive community and well-maintained documentation, which can help developers troubleshoot issues and learn to use the library effectively.
  • Security Best Practices
    The library follows modern security best practices, ensuring that authentication processes are protected against common vulnerabilities.

Possible disadvantages of Auth.js

  • Dependency Management
    Relying on third-party libraries like Auth.js can introduce dependency management challenges, especially with updates and security patches.
  • Abstraction Complexity
    While the abstraction provided by Auth.js simplifies implementation, it may reduce the flexibility for developers who need low-level access to customize authentication processes deeply.
  • Learning Curve
    For developers unfamiliar with authentication concepts or modern JavaScript frameworks, there may be a learning curve to effectively utilize Auth.js.
  • Performance Overhead
    Integrating an additional library like Auth.js may introduce some performance overhead, which could be a concern for applications with stringent performance requirements.
  • Limited Offline Support
    Auth.js is primarily designed for online authentication flows, which may not be ideal for applications requiring robust offline support.

Supabase features and specs

  • Real-time capabilities
    Supabase offers real-time database features that allow you to subscribe to database changes and sync data with your frontend seamlessly.
  • PostgreSQL foundation
    Supabase is built on PostgreSQL, a robust, mature, and highly extensible SQL database, providing strong data integrity and reliability.
  • Open-source
    Supabase is open-source, which means you can inspect, modify, and contribute to the source code. This fosters community engagement and transparency.
  • Ease of use
    Supabase provides an intuitive dashboard and auto-generated APIs, making it easy for developers to manage databases without extensive backend knowledge.
  • Authentication and Authorization
    Supabase includes pre-built authentication and authorization modules, supporting various sign-in methods like email, OAuth, and more, simplifying user management.
  • Scalability
    Supabase is designed to scale with your application, offering plans that can handle from small to large-scale traffic and data operations.

Possible disadvantages of Supabase

  • New and evolving
    As a relatively new platform, Supabase is still evolving, which means it might lack some features found in more mature solutions and could have occasional bugs or stability issues.
  • Limited integration
    Currently, Supabase has fewer third-party integrations compared to other established backend-as-a-service (BaaS) providers, which might limit its utility in diverse tech stacks.
  • Learning curve
    Despite its user-friendly interface, there could be a learning curve for those unfamiliar with PostgreSQL or real-time database concepts.
  • Pricing for advanced features
    While Supabase offers a free tier, advanced features, and higher usage plans come with a cost. This might be limiting for startups or hobby projects with tight budgets.
  • Limited geographic presence
    Supabase's infrastructure might have limited geographic data centers compared to larger cloud providers, potentially affecting latency and performance for users in certain regions.

Analysis of Supabase

Overall verdict

  • Supabase is a strong choice for developers looking for an affordable, open-source solution to manage their application's back-end with real-time data and user authentication.

Why this product is good

  • Supabase is an open-source alternative to Firebase, providing a robust back-end platform for web and mobile applications.
  • It offers real-time capabilities, authentication, and auto-generated APIs with PostgreSQL, making it versatile and efficient.
  • The platform is developer-friendly with excellent documentation and an active community.
  • Being open-source allows for greater flexibility and control over your projects.

Recommended for

  • Developers seeking an open-source alternative to Firebase.
  • Teams that require real-time data synchronization.
  • Projects needing a scalable and easy-to-use back-end solution.
  • Individuals or teams working with PostgreSQL.

Auth.js videos

Clerk vs Next-Auth.js | It's not that simple...

Supabase videos

Basic demo

More videos:

  • Review - Supabase in 100 Seconds by Fireship

Category Popularity

0-100% (relative to Auth.js and Supabase)
Developer Tools
3 3%
97% 97
Authentication
100 100%
0% 0
Realtime Backend / API
0 0%
100% 100
Identity Provider
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 Auth.js and Supabase

Auth.js Reviews

We have no reviews of Auth.js yet.
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Supabase Reviews

10 Top Firebase Alternatives to Ignite Your Development in 2024
Supabase makes it incredibly easy to migrate from Firebase. Its data structure and APIs are designed to feel familiar, so you can switch without a major learning curve. Plus, the open-source nature means you have complete control over your code and data.
Source: genezio.com
Top 7 Firebase Alternatives for App Development in 2024
Community Support and Longevity: Investigate the size and activity of the platform's community. A larger, more active community can provide better support and resources. Platforms like Parse and Supabase have strong community support.
Source: signoz.io
5 Best Vercel Alternatives for Next.js & App Router
Supabase distinguishes itself through its focus on data and community-driven development. Self-hosting capabilities allow you to deploy Supabase's suite of products within your own infrastructure. This maintains data ownership while still leveraging Supabase's tools.
Source: il.ly
Best Serverless Backend Tools of 2023: Pros & Cons, Features & Code Examples
Create an account, a project, and a database. Unlike a NoSQL database like Firebaseโ€™s, you need to have a structure ready to be able to manipulate data. But once this step is doneโ€•and youโ€™ll have ready-to-use templates to help speed up this partโ€•you can call Supabase like so:
Source: www.rowy.io
2023 Firebase Alternatives: Top 10 Open-Source & Free
Supabase is another trusted platform in our list that calls itself an open-source alternative to Firebase. You can also name it one of the newest cloud service providers similar to Firebase because it launched in 2020. Indeed, with great scalability and documentation support, Supabase could be an ideal option.

Social recommendations and mentions

Based on our record, Supabase seems to be a lot more popular than Auth.js. While we know about 521 links to Supabase, we've tracked only 27 mentions of Auth.js. 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.

Auth.js mentions (27)

  • Top 5 Open Source Identity and Access Management (IAM) providers 2025
    Home page | GitHub Repo | Documentation | Discord community. - Source: dev.to / 6 months ago
  • Next.js and Next-Auth V5: Guide to Social Logins(OAuth)
    Auth.js is an open-source authentication library that integrates with modern JavaScript frameworks like Next.js, Svelte, and Express. Previously the project was available only for Next.js and thus it used to be called Next-Auth. Today, a portion of Auth.js is still supports Next-Auth, but along with it, there are SvelteKitAuth, and ExpressAuth available too. - Source: dev.to / 8 months ago
  • Real-Time Authorization in a Chat Application with Permit.io and WebSockets
    Weโ€™ll be using Auth.js, an authentication library originally built for Next.js. Run the following command to install the package:. - Source: dev.to / 8 months ago
  • Simple Next.js Magic Link JWT Authentication with Prisma, PostgreSQL, and Resend
    When building web applications, authentication is almost always a core requirement. I needed something simple and secure that would let me get started quickly on new projects without over-complicating the setup. My goal was to have a solution that's easy to implement, handles email verification out of the box, and just works. In this post, I'm sharing how to build a straightforward magic link authentication system... - Source: dev.to / 12 months ago
  • Building a Personal Finance App with Arcjet
    This article will serve as a guide on how to create a simple finance management app using Arcjet, Next.js, Auth.js, Prisma, SQLite, and Tailwind CSS. Building a personal finance management app with modern web development skills, practical functionality, and robust security helps drive home the point of how effective it can be to incorporate these features. Our application will be proof of concept, so there will be... - Source: dev.to / about 1 year ago
View more

Supabase mentions (521)

  • Optimize Read Performance in Supabase with Postgres Materialized Views
    This tutorial explains how I improved my application's read performance using Postgres materialized views in Supabase. - Source: dev.to / 4 days ago
  • Mastering Postgres Window Functions for Data Analysis in Supabase
    All examples in this blog are tested on Supabase, an open source backend-as-a-service (BaaS) platform that simplifies backend development for web and mobile applications. Supabase provides full support for Postgres databases. - Source: dev.to / 10 days ago
  • Data Integrity First: Mastering Transactions in Supabase SQL for Reliable Applications
    But relying on these safeguards isn't as simple as sprinkling BEGIN and COMMIT into your code. You still have to address challenges like race conditions, constraint violations, and mid-transaction failures across API layers. Supabase helps solve these issues by building on Postgres and handling the transaction logic directly at the database itself. It exposes the logic through streamlined interfaces that preserve... - Source: dev.to / 11 days ago
  • Build a Real-Time Chat App with Flutter and Supabase
    If you don't have an account, head over to supabase.com and sign up. Once you're in, create a new project. Give it a name, generate a secure database password, and choose a region. Your project will be ready in a couple of minutes. - Source: dev.to / 11 days ago
  • Cheat Sheet for Basic Python for Postgres
    Instead of setting up a local Postgres instance, I decided to use Supabase because it provides a fully managed, hosted Postgres database out of the box, simplifying the setup time and database management. This allows us to focus entirely on writing and deploying the application code without worrying about infrastructure details. First, visit Supabase and create a free account if you don't have one yet. - Source: dev.to / 16 days ago
View more

What are some alternatives?

When comparing Auth.js and Supabase, you can also consider the following products

Next.js - A small framework for server-rendered universal JavaScript apps

Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.

Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.

Simple OTP - Simple passwordless authentication for your website. Source code included.

AppWrite - Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.

Resend - Email for developers