
Slack
Telegram
Element.io
Mattermost
Discord
WhatsApp
Signal
Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.

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, Zulip seems to be more popular. It has been mentioned 67 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | zulip.com | clientforms.app |
| Pricing | ||
| Company | Startup from the United States | — |
| 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
Zulip is recommended for organizations and teams that value open-source software, require structured threading for discussions, and want to maintain organized communication channels. It's also ideal for remote teams or any group that engages in complex, multi-topic dialogues.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Zulip - a Free, Open Source, Self Hosted Alternative to Slack and Microsoft Teams Chat.
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Zulip 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 Zulip 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.


Disclosure: I work on Zulip full-time. Trying to be honest about the annoying parts too. I've used Zulip for 2 years for work. I'm in India and my teammates are spread across a few continents, so most of the...
It is oIt is one of the free and open-source APIs and a great alternative to Slack. It combines the best of email and chat to make remote work productive. Zulip is best for internal teams and remote employees to work...
Zulip is a team chat and communication tool that allows business teams to collaborate efficiently. It is an open-source tool and offers a unique thread-based model that allows topic-based discussions internally. So,...
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.


Zulip is building the world’s best collaboration platform, and we’re committed to keeping it 100% open source. Zulip is the only modern team chat app designed for both live and asynchronous conversations. Our product serves as the... - Source: Hacker News / 5 months ago
Zulip’s design solves a problem most chat tools struggle with: conversations getting messy over time. - Source: dev.to / 6 months ago
Zulip is a self-hosted team chat platform built around topic-based threading. Every message belongs to a stream (like a channel) and a topic within that stream, so conversations stay organized even when dozens happen in parallel. This is... - Source: dev.to / 8 months ago
Tracking ClientForms.app since Dec 2025.
When comparing Zulip and ClientForms.app, you can also consider the following products.

A messaging app for teams who see through the Earth!
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NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
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Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
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Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
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Mattermost is an open source alternative to Slack.
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Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.
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