
Email on Acid
MailChimp
Browsershots
Sauce Labs
browserling
Constant Contact
CrossBrowserTesting
litmus tests and tracks your email campaigns, so you can always put your best design forward.

NovoPsych
Digital Psychology assessments with research-backed UX for neurodivergent patients. Better completion rates, more comfortable patient experience, instant scoring, trend tracking with secured data hosting.

Which is more popular?
Based on our record, Litmus seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | litmus.com | clientforms.app |
| Pricing | ||
| Company | Startup from the United States · 100 - 249 employees · 2005 | — |
| Listed in |
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Litmus stubble pro DT1100 Trimmer (Unboxing & Review)
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Litmus 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 Litmus 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.


Display any email messsage as a web page, in desktop and mobile views. See the code used behind any email. Scoping is free as a stand-alone service and included with paid subscriptions to the Litmus email optimization...
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.


Email clients are terrible at html, you could try using litmus.com (there's a free trial) that will show you what it looks like in a huge range of clients. Source: over 4 years ago
Hey guys I want to start a new project but I have no clue as to where to start, I want to create something like litmus.com where each user gets an email and then when you send an email to that email account you can see your email on... Source: almost 5 years ago
Tracking ClientForms.app since Dec 2025.
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Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
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