The G2 on FusionAuth

FusionAuth Pros and Cons: Top Advantages and Disadvantages

Quick AI Summary Based on G2 Reviews

Generated from real user reviews

Users find FusionAuth easy to set up and use, providing seamless integration and flexibility for customized workflows. (41 mentions)

Users appreciate the customization and flexibility of FusionAuth, enhancing both branding and integration for their systems. (35 mentions)

Users value the smooth integration capabilities of FusionAuth, enabling centralized authentication and user management across multiple applications. (35 mentions)

Users appreciate the easy integrations of FusionAuth, enhancing their authentication and user management experience seamlessly. (33 mentions)

Users praise the knowledgeable support team of FusionAuth, highlighting their readiness to assist in various scenarios. (31 mentions)

Users find the complexity of setup challenging, requiring patience and time to navigate advanced configurations. (21 mentions)

Users find the complex setup challenging, requiring patience and additional assistance during initial configuration. (15 mentions)

Users experience a difficult learning curve with FusionAuth, but support and documentation help ease the process. (14 mentions)

Users find the limited customization options of FusionAuth challenging, especially for advanced features and enterprise needs. (12 mentions)

Users note the limited features of FusionAuth can hinder functionality, especially for advanced setups and large-scale needs. (12 mentions)

Users face customization difficulties with FusionAuth due to cumbersome theme engines and limited configuration flexibility. (11 mentions)

Users experience a learning curve with FusionAuth, especially when delving into advanced features and functionality. (11 mentions)

Top Pros or Advantages of FusionAuth

1. Ease of Use

Users find FusionAuth easy to set up and use, providing seamless integration and flexibility for customized workflows.

See 41 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"It's a game changer"

What do you like about FusionAuth?

Our company used to use Auth0 both in development and in production, and although it was nice to have something cloud based, it lacked some customizat

Saeef K.

Small-Business (50 or fewer emp.)

4.5/5

"Finally, our team can build features, not just endlessly manage user logins"

What do you like about FusionAuth?

What we truly like is that it is quite seamless to utilise several separate client environments with only a single FusionAuth instance. The flexibilit

2. Features

Users appreciate the customization and flexibility of FusionAuth, enhancing both branding and integration for their systems.

See 35 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"It's a game changer"

What do you like about FusionAuth?

Our company used to use Auth0 both in development and in production, and although it was nice to have something cloud based, it lacked some customizat

Saeef K.

Small-Business (50 or fewer emp.)

4.5/5

"Finally, our team can build features, not just endlessly manage user logins"

What do you like about FusionAuth?

What we truly like is that it is quite seamless to utilise several separate client environments with only a single FusionAuth instance. The flexibilit

3. Integrations

Users value the smooth integration capabilities of FusionAuth, enabling centralized authentication and user management across multiple applications.

See 35 mentions

See Related User Reviews

Scott F.

Small-Business (50 or fewer emp.)

5.0/5

"Excellent product and great resources are available"

What do you like about FusionAuth?

Logically it makes sense. They also provide SDKs for frameworks like Angular. Their blog posts, AI Bot are all useful resources for figuring out OAu

Shakir V.

Mid-Market (51-1000 emp.)

4.5/5

"A Huge Time-Saver That Let Us Ditch Our Legacy Auth Stack for Good"

What do you like about FusionAuth?

What I love most about FusionAuth is that it let us centralize our authentication and user management without having to build everything ourselves. We

4. Easy Integrations

Users appreciate the easy integrations of FusionAuth, enhancing their authentication and user management experience seamlessly.

See 33 mentions

See Related User Reviews

Scott F.

Small-Business (50 or fewer emp.)

5.0/5

"Excellent product and great resources are available"

What do you like about FusionAuth?

Logically it makes sense. They also provide SDKs for frameworks like Angular. Their blog posts, AI Bot are all useful resources for figuring out OAu

Shakir V.

Mid-Market (51-1000 emp.)

4.5/5

"A Huge Time-Saver That Let Us Ditch Our Legacy Auth Stack for Good"

What do you like about FusionAuth?

What I love most about FusionAuth is that it let us centralize our authentication and user management without having to build everything ourselves. We

5. Customer Support

Users praise the knowledgeable support team of FusionAuth, highlighting their readiness to assist in various scenarios.

See 31 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"It's a game changer"

What do you like about FusionAuth?

Our company used to use Auth0 both in development and in production, and although it was nice to have something cloud based, it lacked some customizat

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"Dev-friendly SSO solution"

What do you like about FusionAuth?

It's easy to set up SSO across apps. Also really simple to download and run locally, which helps us test new versions before making any changes. The h

Top Cons or Disadvantages of FusionAuth

1. Complexity

Users find the complexity of setup challenging, requiring patience and time to navigate advanced configurations.

See 21 mentions

See Related User Reviews

Adrian B.

Mid-Market (51-1000 emp.)

5.0/5

"Identity Management That Fits Your Business and Works for Developers."

What do you dislike about FusionAuth?

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 setti

Kevin T.

Small-Business (50 or fewer emp.)

5.0/5

"Auth Made Simple"

What do you dislike about FusionAuth?

A lot more config is needed when setting up our applications. It was a little more difficult to get started.

2. Complex Setup

Users find the complex setup challenging, requiring patience and additional assistance during initial configuration.

See 15 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

4.5/5

"Great tool to put OAuth2 in place"

What do you dislike about FusionAuth?

I haven't heard any complaint from the team. However, some members found it to be harder to understand. But, the more experienced members where able t

Kevin T.

Small-Business (50 or fewer emp.)

5.0/5

"Auth Made Simple"

What do you dislike about FusionAuth?

A lot more config is needed when setting up our applications. It was a little more difficult to get started.

3. Difficult Learning

Users experience a difficult learning curve with FusionAuth, but support and documentation help ease the process.

See 14 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

4.5/5

"Great tool to put OAuth2 in place"

What do you dislike about FusionAuth?

I haven't heard any complaint from the team. However, some members found it to be harder to understand. But, the more experienced members where able t

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"It's a game changer"

What do you dislike about FusionAuth?

The UI is a bit of a learning curve, but once you understand how it operates, you'll be flying through those windows in no time.

4. Limited Customization

Users find the limited customization options of FusionAuth challenging, especially for advanced features and enterprise needs.

See 12 mentions

See Related User Reviews

Satyam G.

Small-Business (50 or fewer emp.)

5.0/5

"Fusion Auth Is Awesome"

What do you dislike about FusionAuth?

Even they provide customize theme for enterprise plan but there should be more preinstall ui the current one is just two tiny small boxes

Kranthi R.

Mid-Market (51-1000 emp.)

4.0/5

"FusionAuth, A highly flexible, cost effective platform that covers all your user management needs."

What do you dislike about FusionAuth?

UI customisations need improvements. Request logs needs to be improved a lot.

5. Limited Features

Users note the limited features of FusionAuth can hinder functionality, especially for advanced setups and large-scale needs.

See 12 mentions

See Related User Reviews

Shane M.

Mid-Market (51-1000 emp.)

5.0/5

"Fantastic piece of software"

What do you dislike about FusionAuth?

the admin UI can feel clunky and unintuitive at times, especially when configuring more advanced features like custom workflows or email templates. It

Adrian B.

Mid-Market (51-1000 emp.)

5.0/5

"Identity Management That Fits Your Business and Works for Developers."

What do you dislike about FusionAuth?

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 setti

6. Customization Difficulties

Users face customization difficulties with FusionAuth due to cumbersome theme engines and limited configuration flexibility.

See 11 mentions

See Related User Reviews

Satyam G.

Small-Business (50 or fewer emp.)

5.0/5

"Fusion Auth Is Awesome"

What do you dislike about FusionAuth?

Even they provide customize theme for enterprise plan but there should be more preinstall ui the current one is just two tiny small boxes

Kranthi R.

Mid-Market (51-1000 emp.)

4.0/5

"FusionAuth, A highly flexible, cost effective platform that covers all your user management needs."

What do you dislike about FusionAuth?

UI customisations need improvements. Request logs needs to be improved a lot.

7. Learning Curve

Users experience a learning curve with FusionAuth, especially when delving into advanced features and functionality.

See 11 mentions

See Related User Reviews

Verified User

Small-Business (50 or fewer emp.)

4.5/5

"Great tool to put OAuth2 in place"

What do you dislike about FusionAuth?

I haven't heard any complaint from the team. However, some members found it to be harder to understand. But, the more experienced members where able t

Verified User

Small-Business (50 or fewer emp.)

5.0/5

"It's a game changer"

What do you dislike about FusionAuth?

The UI is a bit of a learning curve, but once you understand how it operates, you'll be flying through those windows in no time.

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Mitchell W.

Director Product Strategy

Mid-Market (51-1000 emp.)

10/16/2024

"Great IDP for Developer"

4.5/5

What do you like best about FusionAuth?

There are lots of IDPs out there. This one is focused for developers. APIs are at the forefront of their product. Easy to embed in your product. Also, the pricing is tailored to developers versus the big guys. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

It is not as well known as the larger players such as Entra or Okta. Their cloud model is not a multi-tenant model. Seems like they host individual systems on vms. Review collected by and hosted on G2.com.

Response from Brad McCarty of FusionAuth

edit

Thanks for the review, Mitchell! I'd love to hear more about your thoughts on multi-tenant. As far as we're concerned, being single-tenant hosted means that you don't have to worry about problems with noisy neighbors, and it helps you avoid potential breaches when someone else causes a problem.

Verified User in Financial Services

Mid-Market (51-1000 emp.)

4/23/2025

"Enabling Webhooks and License upgrades"

5/5

What do you like best about FusionAuth?

I like the support Slack channel and the easy-to-understand API key UI. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

I tend to run into caching issues going from different environments/zones. Dev, Stage, & prod, for example. Review collected by and hosted on G2.com.

Verified User in Computer Software

Small-Business (50 or fewer emp.)

4/14/2025

"Quick and simple integration! (Developers friendly)"

4.5/5

What do you like best about FusionAuth?

Integration into our project: quick and simple, with numerous examples and complete, up-to-date documentation. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

Control panel a bit complex to understand. Review collected by and hosted on G2.com.

Verified User in Information Technology and Services

Mid-Market (51-1000 emp.)

4/14/2025

"Fusionauth is great"

4.5/5

What do you like best about FusionAuth?

I like how easy it is to use and administer. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

I haven't encountered any issues when using FusionAuth. Review collected by and hosted on G2.com.

Verified User in Financial Services

Mid-Market (51-1000 emp.)

4/11/2025

"FusionAuth Review"

2.5/5

What do you like best about FusionAuth?

Pricing is very competitive and it's very easy to onboard. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

Customer support is lacking considering that we wanted to upgrade our plan later on. Review collected by and hosted on G2.com.

Response from Story Tweedie-Yates of FusionAuth

edit

I'm sorry we didn't meet your expectations receiving support for FusionAuth. FusionAuth offers support in a variety of ways. Anyone is welcome to visit both our Community Forum (https://fusionauth.io/community/forum/), Public Slack, and our Github repositories (https://github.com/FusionAuth). FusionAuth employees engage the community through each of those avenues on a regular basis answering questions and providing guidance.

More direct support is built into our licensing model as well. With an Essentials or Enterprise license more direct and asynchronous support is available if needed. We try to be as transparent as possible as it relates to our support modal and you can find more details about that on our pricing page: https://fusionauth.io/pricing.

Ankur S.

Director Senior Principal Cloud and Data Solutions Architect | Cloud and Data Leader

Enterprise (> 1000 emp.)

4/8/2025

"It was fine experience using Fusion Auth"

3.5/5

What do you like best about FusionAuth?

Authentication and authorization. Also, user management working well for us Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

There are better competitors available in less price and better services. Review collected by and hosted on G2.com.

Verified User in Higher Education

Small-Business (50 or fewer emp.)

5/22/2025

"User experience"

4/5

What do you like best about FusionAuth?

Lots of options to build a robust security pipeline Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

the interface is a bit confusing make it seem complicated Review collected by and hosted on G2.com.

Verified User in Information Technology and Services

Mid-Market (51-1000 emp.)

4/8/2025

"FusionAuth Review"

4/5

What do you like best about FusionAuth?

They make multi-factor authentication very smooth and fast Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

Nothing, this is a very good platform if I need to do MFA, and SSO Review collected by and hosted on G2.com.

Verified User in Consumer Services

Mid-Market (51-1000 emp.)

3/25/2025

"Good product with myriad possibilities"

4/5

What do you like best about FusionAuth?

FusionAuth is a robust CIAM that offers many features for authenticatication and authorization. The team is helpful and the product is easy to use. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

Although there is a lot of documentation, I miss the details and the depth sometimes. I'd also appreciate more video tutorials on more complex subjects and implementations. Review collected by and hosted on G2.com.

Matthew C.

Small-Business (50 or fewer emp.)

3/4/2024

"A fantastic CIAM service which feels like it was built for developers"

5/5

What do you like best about FusionAuth?

- Once you have done the initial configuration in your code base (setting the callback routes, handling the grant in your controller etc.) , everything else can be configured in the FusionAuth Dashboard. For example, adding new IdPs, themeing, hiding/showing fields etc. can all be done in a intuitive UI without needing to redploy your application.

- The FusionAuth Dashboard itself is (to me) much more straightforward and locigical compared with Auth0, which I have used in the past. They have some great features in there like "Lambdas" which trigger when certain actions happen, making it easy to hook into the signin flow dependant on which IdP you are using. It is very customizable, but also has some great default out-of-box settings.

- Pretty active developer support through a maintained GitHub Issues page, which feels like they are working alongside developers to build a product that their users want.

- All the support and advice during the kick-off meetings was very helpful. Sometimes those meetings can be sales-heavy, but we had a lot of engineers on the call offering great insights and advice. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

- Whilst the documentation is pretty good, getting started is a little overwheleming, mainly because of all the different ways that you can configure FusionAuth (self-install or cloud-based). A more streamlined "Getting Started" guide for SaaS based products using cloud-based instances would help to get up-to-speed quicker. I feel like the documentation is all there, but it is sometimes hard to find what you need due to the way it is organized.

- I love that you can really customize the theme of all the pages and emails. However the theme template engine that they use is a little bit cumbersome. Once you get the hang of it, it does the job fine, but there is a bit of trial-and-error required to get started with it. Review collected by and hosted on G2.com.

What problems is FusionAuth solving and how is that benefiting you?

- Enables us to quickly add support to any IdP that we need

- Comes with the ability to support SCIM which helps us to provide an enterprise login solution for our larger customers

- Gives us access to more advanced login features such passwordless login, biometric login, more MFA options, password breach checks etc. Review collected by and hosted on G2.com.