
Auth0
Keycloak
Okta
Amazon Cognito
LoginRadius
Clerk Authentication
Frontegg
FusionAuth is a CIAM platform that is 100% free for unlimited users.

TestMu AI (Formerly LambdaTest)
Sauce Labs
CrossBrowserTesting
browserling
Selenium
Ghost Inspector
Katalon
BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.

Which is more popular?
Based on our record, FusionAuth should be more popular than BrowserStack. It has been mentioned 31 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | fusionauth.io | browserstack.com |
| Pricing | ||
| Platforms | — | |
| Company | 2019 | Startup from Ireland · 500 - 999 employees · 2012 |
| Listed in |
In their own words, as submitted to SaaSHub.


FusionAuth adds authentication, authorization, user management, reporting, analytics and much more in minutes not months.
BrowserStack is a leading software testing platform powering over two million tests every day across 15 global data centers. With BrowserStack, developers can comprehensively test their websites and mobile applications across 2,000+ real mobile devices and browsers in a single cloud platform—and...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
FusionAuth is recommended for developers and organizations that require a highly customizable and feature-rich identity management solution. It’s particularly suitable for businesses with specific authentication needs, such as multi-tenant environments, custom user registration workflows, and advanced security features. It is ideal for medium to large enterprises and development teams comfortable with configuring and maintaining a flexible authentication platform.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Replicating StackOverflow login with FusionAuth
More videos
BrowserStack Overview
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using FusionAuth and BrowserStack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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#.
/ 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....
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....
BrowserStack lets you test your website or app on actual phones, tablets, and browsers so you see exactly how it will work in real life. It also includes some basic test management features.
BrowserStack is another leading cloud-based testing platform that offers access to a vast array of browsers and real mobile devices. It's designed to simplify the testing process by allowing tests to run in parallel...
Companies like HeadSpin and BrowserStack play a significant role in fulfilling the demand for testing on real devices and cross-browser devices. Their ability to test on real devices online and monitor digital...
Recommendations tracked on public social media and blogs since March 2021.


Why does the https://fusionauth.io/ website suck then? Enough of these code is worthless propaganda articles. - Source: Hacker News / 3 months ago
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... - Source: Hacker News / over 2 years ago
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 / over 2 years ago
This is pretty cool - the Jira/Linear integration could save a ton of manual work. How do you handle test data setup and teardown? That's usually where these workflows get messy. For alternatives in this space, there's qawolf... - Source: Hacker News / over 1 year ago
Platforms like Browserstack or SauceLabs offer virtual instances of real devices and browsers for manual and end-to-end testing. Caveat: subscriptions cost money and are on a per-seat basis. - Source: dev.to / over 2 years ago
If you go to browserstack.com (a website to test other websites) you can probably to the chatgpt url and sign up there. Source: almost 4 years ago
When comparing FusionAuth and BrowserStack, you can also consider the following products.

Auth0 is a program for people to get authentication and authorization services for their own business use.
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World’s first full-stack Agentic AI Quality Engineering platform.
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Open Source Identity and Access Management for modern Applications and Services.
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Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
Compare Sauce Labs to FusionAuth or BrowserStack:

Enterprise-grade identity management for all your apps, users & devices
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Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.
Compare CrossBrowserTesting to FusionAuth or BrowserStack: