FusionAuth Reviews & Product Details

I really appreciate FusionAuth's ease and modern UI, which make managing user roles and organizations straightforward and prevent these tasks from becoming a side project. The administration UI is particularly usable, providing an efficient way to manage these elements. I value the built-in multi-tenant support, single sign-on (SSO), and permission features that eliminate the need for hand-coding authentication logic, significantly simplifying the management process. Moreover, FusionAuth has saved me the effort of developing additional services to manage roles and authorization, which is a huge time saver. Review collected by and hosted on G2.com.

Some parts of FusionAuth feel a bit too configurable, which can be overwhelming. Although the flexibility is generally positive, it results in having to click through multiple menus for a single tweak that ideally should be centralized. This adds unnecessary complexity and detracts from an otherwise efficient user experience. Review collected by and hosted on G2.com.

I appreciate the simplicity of FusionAuth, which makes it easier to use. The great support provided is definitely a plus, and I find the pricing to be appealing. Review collected by and hosted on G2.com.

I heard a developer say that he wishes that the redirect to FusionAuth took more query parameters so we could pass more context along. Review collected by and hosted on G2.com.

The flexibility and developer-friendliness are my favorite things about FusionAuth. It can be a real challenge to configure multi-step authentication processes when you’re not a full-stack security engineer; however, it is enough to get it done in a few simple tweaks due to the existing functionality and lucid documentation. I hardly ever need anything that’s not already onboard, but if I do, the API is robust enough to not struggle to hammer it into other systems. Review collected by and hosted on G2.com.

Indeed, the depth of the system might be overwhelming for a novice, and it will take some time to get accustomed to the functionality before all settings are configured properly. Comparing it with Auth0 or Okta, it is reasonably priced, though some advanced enterprise features may feel expensive for a micro-enterprise. More so, file limits concerning logs, and event data may also prove a limitation in case you would want to archive an extensive history. Review collected by and hosted on G2.com.

What I love most about FusionAuth is that it let us centralize our authentication and user management without having to build everything ourselves. We had dozens of apps with fragmented login flows, and FusionAuth helped us unify them under a single, secure system. The React SDK and robust API support made integration surprisingly smooth—even with some of our older applications. Review collected by and hosted on G2.com.

The hosted UI felt limiting at times—we had some very specific customization needs that were hard to implement using their pre-built components. Also, while the docs are good overall, searching for advanced implementation details (like how IDs behave in multi-tenant setups) can be frustrating. It’s not as intuitive for smaller teams or startups that are just getting familiar with complex IAM concepts. Review collected by and hosted on G2.com.

I love how FusionAuth is so developer-centric and flexible. It took me just days to integrate it into our SaaS platform, rather than the weeks of authentication setup we used to go through. The flexibility related to user authentication flows, specifically multi-tenant login, social login, passkeys, and biometrics, is just outstanding. Universal logins along with two-factor support were quite a professional first-day undertaking in terms of security setups. Review collected by and hosted on G2.com.

The major drawback that I have faced has to do with pricing clarity as one scales. For startups or teams who have just started with user authentication, it is not always obvious wherein the long run the cost implications lie. It would be very useful if FusionAuth was clearer on its cost structures at scale. Review collected by and hosted on G2.com.

We have complex needs in that we’re a multi-sided, multi-tenant enterprise SaaS platform and need to support customer specific identity providers for SSO. We also require end-to-end authentication across different applications, microservices, and APIs. FusionAuth’s flexible multi-tenant architecture and first-class developer experience enabled us to unify all of this in short order, and made it simpler than others (at the time) to do so. Review collected by and hosted on G2.com.

Their commercial practices are horrible. For many years we were a "no maintenance" customer, never needing to leverage their support or complain in any way. At the request of their CEO we let them do a press release about our selection of them. We served as a sales reference too, even speaking with prospects, at least one of which became a customer spending more than double what we did.

Last year, out of the blue, FusionAuth dropped a more than 2x price increase coupled with an annual commitment under the guise of dropping high availability hosting from the plan we were on. We didn't need any of the features in the new tier, either.

Their account executive hounded us relentlessly via email and voice mail, all the while ignoring our request for specifics as to how a downgrade would be handled if we did not proceed. Ironically, their VP of sales would email about "our continued partnership." Meanwhile, their backoffice kept renewing our existing plan, sending mixed messages.

After years of being their advocate, we were left feeling like just another number to squeeze for revenue. Review collected by and hosted on G2.com.

I use FusionAuth for authentication and user management, including for SSO and roles. I find it user-friendly and that it works out of the box. It's easy to integrate too. The setup is straightforward, and the documentation is clear, which enhances my experience significantly. Compared to Keycloak, FusionAuth feels less complicated and more straightforward, making the initial setup pretty easy. Review collected by and hosted on G2.com.

The UI feels too complicated at first. Some advanced features take time to understand, and an advanced toggle or similar option could be helpful. Review collected by and hosted on G2.com.

What I appreciate most about FusionAuth is how seamlessly it secures our environment using multi-factor authentication (MFA) without compromising on usability. The FusionAuth Push feature is by far the most convenient — I just tap my phone to approve access, no codes needed. Its integration with Microsoft 365, on-prem Active Directory, Meraki, and even third-party apps like AWS and Falcon Antivirus has made deployment very flexible across our stack. I also really value the Unified Endpoint Visibility dashboard — it gives me a clear view of every device accessing our systems, from corporate laptops to BYODs. Review collected by and hosted on G2.com.

FusionAuth’s setup process can be overwhelming, especially when configuring SSO with on-prem systems — the documentation is there, but it demands careful reading. It’s also frustrating that you need internet access for it to work; there's no offline mode fallback. And while the mobile-first experience is great, it becomes a problem if the phone is lost or forgotten — you’re effectively locked out. Review collected by and hosted on G2.com.

What I appreciate most about FusionAuth is how seamlessly it balances strong multi-factor authentication (MFA) with flexible integration into our existing infrastructure. The Duo Push-style interface, where users can just tap a notification instead of putting in codes, makes it more easier for people to use, even teams who aren't very tech-savvy. We’ve even been able to scale usage across over 2,000 endpoints without breaking a sweat. Review collected by and hosted on G2.com.

The initial setup, especially configuring SSO with on-prem Active Directory or federated 365 domains, required a lot of careful reading and re-reading of documentation. It’s not something you want to rush, and integration with legacy systems wasn’t as plug-and-play as we’d hoped. Sometimes, the authentication pop-ups don’t appear unless the app is manually opened, which frustrates some of our users. Review collected by and hosted on G2.com.

The hands-on help we received from their staff Review collected by and hosted on G2.com.

High entry point in terms of price - problematic for experimenting with new approaches

Some of the features remain paywalled Review collected by and hosted on G2.com.