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External reviews

67 reviews
from G2

External reviews are not included in the AWS star rating for the product.


    Halie C.

I use it for our rental fleet at my business

  • April 08, 2025
  • Review verified by G2

What do you like best about the product?
It is easy to use and everything is one place
What do you dislike about the product?
There are several steps to get into the program I need
What problems is the product solving and how is that benefiting you?
na


    Financial Services

A highly customizable authentication provider

  • April 07, 2025
  • Review verified by G2

What do you like best about the product?
With FusionAuth it becomes easy to manage the authentication of its applications. One of the biggest advantages of Fusionauth that I appreciated is its API interface which allows to build an overlay when Fusionauth does not make accessible to certain functionalities while maintaining Fusionauth as the authentication core.
What do you dislike about the product?
Currently, it is not yet possible to manage one-click migrations between different instances or environments. The only possible solution is to write scripts that can apply changes between different environments; this works but could be made even easier if fusionauth allowed one-click migrations.
What problems is the product solving and how is that benefiting you?
- User management
- Authentication
- Authorization


    Consumer Services

Developer

  • March 26, 2025
  • Review verified by G2

What do you like best about the product?
Very clear interface and easy to use API. I find the documentation also to be clear and easy to search
What do you dislike about the product?
Searching users is sometimes slow: we have over a million users.
What problems is the product solving and how is that benefiting you?
We have a website and other internal applications that require authentication, with FusionAuth we can create diffferent applications with different settings.


    Computer Software

A Mixed Bag with FusionAuth

  • March 25, 2025
  • Review verified by G2

What do you like best about the product?
I really appreciate the customization FusionAuth brings to the table - it’s a standout feature that gives you the flexibility to mold it to your specific needs. The model is well-designed, and the feature set is impressive, covering a lot of bases for authentication and user management. It feels developer-friendly, which makes integration into projects smoother and more enjoyable.
What do you dislike about the product?
Despite its strengths, there are some frustrating drawbacks. The API breaking between releases is a big issue - it’s disruptive and adds unnecessary rework. I also found the authorization customization lacking; there’s no easy way to implement permission-based or attribute-based authorization, which feels like a missed opportunity for a service like this. On top of that, the API can be unreliable. For example, when deleting a user from a group, I’ve seen inconsistent results—sometimes it removes their roles, sometimes it doesn’t, and it’s unpredictable. These issues make it harder to rely on consistently.
What problems is the product solving and how is that benefiting you?
FusionAuth is solving problems related to authentication, authorization, two-factor authentication (2FA), and single sign-on (SSO) by offering a system that manages user logins, assigns basic roles, provides 2FA options like Google Authenticator or SMS, and enables SSO across applications using standards like OAuth2 and OpenID Connect. For me, this means I can offload these identity management tasks without building them from scratch, which reduces development time. However, the inconsistent API behavior - like unpredictable role deletions when removing users from groups - and limited authorization flexibility require me to spend extra effort on workarounds or adjustments.


    Consumer Services

Good product with myriad possibilities

  • March 25, 2025
  • Review provided by G2

What do you like best about the product?
FusionAuth is a robust CIAM that offers many features for authenticatication and authorization. The team is helpful and the product is easy to use.
What do you dislike about the product?
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.
What problems is the product solving and how is that benefiting you?
Improving our SSO solution.


    Mayuran S.

Reliable Product

  • March 25, 2025
  • Review verified by G2

What do you like best about the product?
Ease of integration and implementation was the primary reason to move forward with FusionAuth as our vendor. They are extremely communicative with any downtime and have only 1 incident that affected our integration since we integrated FusionAuth in Oct 2023.
What do you dislike about the product?
Easier access to uptime such as a status page would be appreciated
What problems is the product solving and how is that benefiting you?
Offboarding CIAM was the primary focus and introducing MFA needed for our cloud security needs.


    Pramodchakravarti P.

FusionAuth - Seamless CIAM Solution with Strong Security and Flexibility

  • March 10, 2025
  • Review verified by G2

What do you like best about the product?
Comprehensive identity and access management solution – FusionAuth.

I've been using FusionAuth for nearly four years, and it stands out as a state-of-the-art solution. It seamlessly covers IAM/CIAM, offering various features that align perfectly with our requirements. I also appreciate the team's proactive approach in providing education and addressing priority concerns whenever we reach out.
We never had a downtime or an impact for login functions after using FusionAuth.
What do you dislike about the product?
Changing the front-end / UI reuqires a special skillsets or work with a few vendors. This could have been simplified.
Plug and play for a layman to deal with security, IAM.
What problems is the product solving and how is that benefiting you?
FusionAuth helping us to move out of monolith design. And reducing TTM to onboard customers.


    Music

FusionAuth is a solid authentication provider with fair pricing

  • March 07, 2025
  • Review verified by G2

What do you like best about the product?
FusionAuth is a solid authentication provider with fair pricing when compared to other providers. It is fully feature, offering authentication methods ranging from classic user/password to magic links and social IDPs. It is easy to use, easy to integrate and implement thanks to the technical resources they provide, both in the form of documentation and subject matter experts. As an Enterprise client, we have access to a Slack channel allowing us to get quick and responsive support from the FusionAuth team. FusionAuth Cloud is a robust solution that can be used to authenticate hundreds of thousands of users on a daily basis.
What do you dislike about the product?
The Terraform provider to manage the FusionAuth deployment configuration sometime lags behind software releases leading to some issues when environments are strictly managed via Infrastructure as Code practices. Some customization and configuration options can only be defined at the Tenant level which can lead to some pain points when it comes to meeting some product or business requirements on an application-per-application basis. The FusionAuth Cloud versions lacks some monitoring options like Prometheus that are available when self-hosting.
What problems is the product solving and how is that benefiting you?
FusionAuth Cloud allows our business to provide secure, state of the art authentication to our users without the need to develop a significant authentication and security expertise in house. The Cloud version is also very stable and robust which allows us to have peace of mind when it comes to the availability of our authentication platform.


    Kranthi R.

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

  • March 07, 2025
  • Review verified by G2

What do you like best about the product?
Flexibility and a lot of options to build customised solutions.
Especially the ability to manage users across different countries with clear boundaries using tenants.
Customisations ranging from themes, lamdas to sms templates.
Events, logs and auditing it just covers all your needs.
What do you dislike about the product?
UI customisations need improvements. Request logs needs to be improved a lot.
What problems is the product solving and how is that benefiting you?
User management and access management across our apps.


    Rod M.

Excellent product, responsive team

  • March 07, 2025
  • Review verified by G2

What do you like best about the product?
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.
What do you dislike about the product?
Need more information in some Lambdas (JWT Populate)
Not easy to follow what the future feature roadmap is.
What problems is the product solving and how is that benefiting you?
Freeing us from having implement SCIM/SAML/Password policies.