
Auth0
Keycloak
Okta
Amazon Cognito
LoginRadius
Clerk Authentication
Frontegg
FusionAuth is a CIAM platform that is 100% free for unlimited users.

NovoPsych
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures by secure link and review scored results, severity bands and reports.

Which is more popular?
Based on our record, FusionAuth seems to be more popular. It has been mentioned 31 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | fusionauth.io | clientforms.app |
| Pricing | ||
| Company | 2019 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


FusionAuth adds authentication, authorization, user management, reporting, analytics and much more in minutes not months.
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures such as the PHQ-9, GAD-7 and DASS-21 by secure link and get scored results, severity bands and reports ready to review. The catalogue also includes DSM-5 ADHD assessments and autism screening tools....
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
FusionAuth is recommended for developers and organizations that require a highly customizable and feature-rich identity management solution. It’s particularly suitable for businesses with specific authentication needs, such as multi-tenant environments, custom user registration workflows, and advanced security features. It is ideal for medium to large enterprises and development teams comfortable with configuring and maintaining a flexible authentication platform.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Replicating StackOverflow login with FusionAuth
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing FusionAuth and ClientForms.app.
ClientForms.app's answer:
Frontend: Next.js 15 (React 19), Tailwind CSS Backend: Supabase (PostgreSQL, Row-Level Security) Authentication: Clerk Payments: Stripe Hosting: Vercel (Sydney region) Database hosting: Supabase (Australian data residency)
ClientForms.app's answer:
Psychologists who assess ADHD and autism. Typically private practice, solo or small group (1-5 clinicians), currently using paper forms and spending hours on admin per assessment. They want something that works and is secure.
ClientForms.app's answer:
Neurodivergent-first design. Most digital forms just replicate paper online. ClientForms is built specifically for ADHD and autism patients - progress bars with time remaining (helps with time blindness), softer colours instead of harsh white, sticky headers so you always know where you are. The forms are designed to reduce anxiety and improve completion rates.
ClientForms.app's answer:
Most clinical software treats patients as an afterthought. ClientForms is designed specifically for neurodivergent users who are filling out the forms, progress indicators, time estimates, calmer colours, predictable layouts. One link, no signup required, works on any device. Patients just open and complete.
Share your experience with using FusionAuth and ClientForms.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Like Auth0, FusionAuth is a powerful user management solution with a lot more to offer. Getting started and setting up FusionAuth takes no time because it is compatible with databases, such as Java and C#.
/ Digitalberry news / IAM: A comparison of open-source toolsIAM: A comparison of open-source toolsWhy use an Identity Provider (IdP)?Comparative study of Identity Providers (IdP)1. Our team’s first choice: Keycloak2....
One of the biggest differences between Auth0 and FusionAuth is cost. FusionAuth is free for unlimited users. No strings, gimmicks, or tricks. No cost increases when you hit a certain Monthly Active User threshold....
We have no reviews of ClientForms.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Why does the https://fusionauth.io/ website suck then? Enough of these code is worthless propaganda articles. - Source: Hacker News / 3 months ago
As someone who came from Auth0 and god-awful Amazon Cognito, we've been using FusionAuth for years. Their APIs and SDKs have been amazing to work with. https://fusionauth.io It does what Auth0 does but significantly more cheaper and you... - Source: Hacker News / over 2 years ago
FusionAuth is one of the most decorated and successful open-source IAM solutions. It has been downloaded by more than 10 million customers and hosts over 1 million digital identities. - Source: dev.to / over 2 years ago
Tracking ClientForms.app since Dec 2025.
When comparing FusionAuth and ClientForms.app, you can also consider the following products.

Auth0 is a program for people to get authentication and authorization services for their own business use.
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NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
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Open Source Identity and Access Management for modern Applications and Services.
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Enterprise-grade identity management for all your apps, users & devices
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Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.
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Loginradius is a cloud-based customer identity and access management platform. LoginRadius empowers businesses to deliver a delightful customer experience without compromising security.
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