FusionAuth Reviews & Product Details

I appreciate their flexible self service options for role and permission management. It cuts down my need for engineering involvement for setting and gatekeeping access for multiple application logins to a single account. The self hosted option gives me control. It also feels modern and easy to manage and it also gives me the peace of mind knowing that all the data remains in our control. Review collected by and hosted on G2.com.

The documentation provided is detailed but there are instances where it assumes a certain technical knowledge that some of my team members do not possess which can lead to longer onboarding times. And I can understand the need for fast iterative cycles but some updates have introduced minor config changes that have actually broken some things. Review collected by and hosted on G2.com.

FusionAuth suited my needs as the authentication system for a number of web applications I use and I particularly like the ease with which I can control different methods of logging in - email/password, social logins, and even magic links. The self-hosted option is particularly appealing because the APIs are simple, and control over the data is guaranteed. I have the freedom of self-hosting without the worry of being stuck in a rigid setup. Review collected by and hosted on G2.com.

The admin UI could use some work. It is quite frustrating going through many menus for what should be simple adjustments. It takes a lot longer than it should to set some advanced features like a tenant-specific role or a webhook. Other useful features are paid and can be expensive for smaller projects. Review collected by and hosted on G2.com.

Have been using FusionAuth as our primary identity provider for a few years now. It's been fantastic. Their documentation is professionally written and well organized - that along with their "Ask AI" feature has made it possible to accomplish some sophisticated configurations to meet our customer needs without having to reach out needlessly for support. Speaking of support... they are very friendly and quick to respond to messages. Various installation methods (managed or self-hosted) and different plan tiers make it quite flexible for various product needs. The starter plan is very generous and compared to other offerings on the market the cost is minimal. Overall I'm very pleased with selecting FusionAuth as our identity provider. Review collected by and hosted on G2.com.

Minor gripe, but I would find it helpful to be able to generate more advanced reports on users, usage, sessions, etc from the dashboard directly. Some of the reports I've had to generate in the past were easier to generate by using their API, then writing a quick script to roll-up results. Otherwise, not much to "dislike" about the service - it's frankly been one of the easiest to incorporate into our stack. Very pleased with our decision. 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.

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.

FusionAuth's ability to concentrate everything I need into one, simple platform appeals most to me. FusionAuth provides one tidy dashboard where all of my professional apps sit; I no longer have to go through bookmarks or balance several logins to identify the correct tools. Not only tools, the single sign-on and multi-factor authentication are daily lifesaver. It feels like my entire workflow got a speed boost and a security upgrade all at once. Review collected by and hosted on G2.com.

The multi-step login, especially with MFA, can feel a bit tedious—there have been moments where codes don’t sync or I need to retry a few times. Also, switching devices (especially phones) messes with the setup and isn't as seamless as it should be. And compared to a few competitors like Okta or Auth0, FusionAuth's UI feels a little more functional than refined. Review collected by and hosted on G2.com.