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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Kevin T.

Product Manager

Mid-Market (51-1000 emp.)

6/2/2025

"An all in one identity management provider."

4/5

What do you like best about FusionAuth?

It provided a singular method of authentication across our various platforms with the ability to migrate authentication details. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

We had to navigate conflicts where IDs were shared across multiple platforms. This process was not easy and had to be manually solved. Review collected by and hosted on G2.com.

Rod M.

Distinguished Engineer

Mid-Market (51-1000 emp.)

3/7/2025

"Excellent product, responsive team"

4.5/5

What do you like best about FusionAuth?

Has the features we need, easy to use libraries, team responds to questions/suggestions in a timely manner. Support for SCIM, SAML. Easy to integrate into our application. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

Need more information in some Lambdas (JWT Populate)

Not easy to follow what the future feature roadmap is. Review collected by and hosted on G2.com.

Nirmesh S.

Network Engineer

Enterprise (> 1000 emp.)

4/8/2025

"Good solution for IAM requirements under one hood"

4.5/5

What do you like best about FusionAuth?

Fusion Auth has covered authentication grounds on all levels, be in single sign on, MFA. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

I faced some challenges while moving authenticator backups from my android phone to ios. The backup wasnt compatible with the iphone application. Review collected by and hosted on G2.com.

Verified User in Information Technology and Services

Mid-Market (51-1000 emp.)

5/20/2025

"FusionAuth was the ultimate solution for cross-products unified login experience"

5/5

What do you like best about FusionAuth?

The security and compliance features available in FusionAuth Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

The UI could be better in terms of styling and design Review collected by and hosted on G2.com.

Halie C.

Warranty Administrator

Small-Business (50 or fewer emp.)

4/8/2025

Business partner of the seller or seller's competitor, not included in G2 scores.

"I use it for our rental fleet at my business"

3/5

What do you like best about FusionAuth?

It is easy to use and everything is one place Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

There are several steps to get into the program I need Review collected by and hosted on G2.com.

Carlos N.

Product Manager

Mid-Market (51-1000 emp.)

5/19/2025

"Fantastic product with even better customer service experience"

5/5

What do you like best about FusionAuth?

The team is highly professional, patient, and amicable. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

So far no downsides!! The team is very much available to schedule quick syncs to answer questions. Review collected by and hosted on G2.com.

Aaron D.

Security Officer

Mid-Market (51-1000 emp.)

5/29/2025

"Excellent service and technical support during investigative phase"

3.5/5

What do you like best about FusionAuth?

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

What do you dislike about FusionAuth?

High entry point in terms of price - problematic for experimenting with new approaches Review collected by and hosted on G2.com.

Verified User in Information Technology and Services

Mid-Market (51-1000 emp.)

5/30/2025

"Very good product"

5/5

What do you like best about FusionAuth?

Versatility: FusionAuth supports a wide range of identity standards and protocols

Developer-Friendly Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

• Database Portability: We’d like easier migration between MySQL and PostgreSQL—ideally built-in tooling or export/import processes to switch backends without major rework.

• Cloud-Native Monitoring: Integration with modern observability stacks (like Prometheus, Grafana, or OpenTelemetry) would be a big plus for monitoring health and performance in production environments. Review collected by and hosted on G2.com.

Darrell S.

Director of DevOps

Small-Business (50 or fewer emp.)

10/16/2024

"FusionAuth has provided exceptional support and all necessary features for our online application"

5/5

What do you like best about FusionAuth?

FusionAuth provides a Terraform provider which allows DevOps to support it along side all of our IaC. Their APIs also allow easy integration with scripts where necessary for importing, exporting, and managing all Dev, QA, and Production environments. Our Developers are enthusiastic about the level of documentation and the ease of integration and implementation. We've had excellent support from FusionAuth when needed. Review collected by and hosted on G2.com.

What do you dislike about FusionAuth?

It would be helpful if FusionAuth supported vanity domains for each of our environments instead of only for each FusionAuth server. Review collected by and hosted on G2.com.

Response from Brad McCarty of FusionAuth

edit

Thanks for the feedback, Darrell. I'll pass on your vanity domain thoughts to the Product team. That's an interesting idea!