
Auth0
Keycloak
authentik
Clerk
Okta
Amazon Cognito
SuperTokens
The Identity Infrastructure for Modern B2B SaaS

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, ZITADEL seems to be more popular. It has been mentioned 19 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | zitadel.com | clientforms.app |
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| Platforms | — | |
| Company | Startup from the United States · 20 - 49 employees · 2021 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Zitadel is the open-source alternative for identity management, built specifically to solve the complex multi-tenancy and fine-grained authorization challenges developers face today. We provide a turnkey solution that handles secure login, organization management, and audit trails so you can ship...
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.


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


No analysis of ZITADEL yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ZITADEL 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 ZITADEL and ClientForms.app. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Zitadel is an open-source identity management platform — a self-hosted alternative to Auth0, Okta, and Firebase Auth. It provides authentication, authorization, and user management with a comprehensive API. - Source: dev.to / 8 months ago
Looks nice, we've been using https://zitadel.com/ and the journey to mutli-tennancy was fairly straight forward. - Source: Hacker News / over 1 year ago
If you prefer an open source, and maybe more mature, alternative for multi tenant/b2b auth then have a look at https://zitadel.com (disclosure: work for zitadel). - Source: Hacker News / about 2 years ago
Tracking ClientForms.app since Dec 2025.
When comparing ZITADEL 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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authentik is an open-source identity provider focused on flexibility and versatility.
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Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.
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Enterprise-grade identity management for all your apps, users & devices
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