
Slack
Mattermost
Discord
Element.io
Zulip
Microsoft Teams
Telegram
Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

Substack
Formo.so
Advanced analytics for Substack writers. Runs 100% locally, no cloud, no subscription. Discover your superfans, churn risk, and cohort retention.

Which is more popular?
Based on our record, Rocket.Chat seems to be a lot more popular than StackStats.app. While we know about 68 links to Rocket.Chat, we've tracked only 1 mention of StackStats.app.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | rocket.chat | stackstats.app |
| Pricing | ||
| Company | Startup from Brazil · 50 - 99 employees · 2016 | Startup from the United Arab Emirates · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Rocket.Chat yet.
StackStats is a local desktop app for serious Substack writers. Import your CSV exports and get analytics Substack doesn't show you: bot-filtered open rates, cohort retention, dead subscriber detection, superfan ID, content-to-growth correlation, and an optional AI layer (supports Ollama,...
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
Rocket.Chat is well-suited for businesses and organizations that require a secure and customizable communication platform. It's particularly recommended for IT teams, tech-savvy businesses, or community groups comfortable with managing an open-source solution. It's also a great choice for organizations that need to meet strict data privacy and compliance requirements.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What does Rocket.Chat look like?
No StackStats.app videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Rocket.Chat and StackStats.app.
StackStats.app's answer:
I built StackStats because Substack's native analytics weren't cutting it. I wanted cohort data, real open rates (not bot-inflated), and a way to identify which posts were actually driving subscriber growth — but every tool I found was either cloud-based or required migrating off Substack entirely. So I built a local app that works with Substack's own CSV exports. No migration, no cloud, no subscription.
StackStats.app's answer:
StackStats runs 100% locally on your machine — your subscriber data never touches a server. It also goes far beyond what Substack shows natively: bot-filtered open rates, cohort retention, superfan identification, dead subscriber detection, and content-to-growth correlation. No subscription, no account, no cloud. Pay once, own it forever.
StackStats.app's answer:
Most newsletter analytics tools are cloud-based SaaS with monthly subscriptions. StackStats is a one-time purchase that runs entirely on your device. For Substack writers who care about privacy — especially those with paid subscribers — that's a meaningful difference. You also get analytics features that don't exist anywhere else, like bot-filtered open rates and cohort retention, without having to migrate away from Substack.
StackStats.app's answer:
Serious Substack writers who are frustrated by Substack's shallow native analytics and want real data to drive growth — without moving their subscriber data to the cloud.
StackStats.app's answer:
Electron (macOS + Windows), HTML/CSS/JavaScript, Chart.js, PapaParse. Optional AI layer supports Ollama, Claude, GPT-4, Gemini, Groq, and OpenRouter. Licensing via Cloudflare Workers + D1. Payments via Gumroad.
Share your experience with using Rocket.Chat and StackStats.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.


While Mattermost supports internal communication, Rocket.Chat has extended abilities that promote internal as well as external communication with customers, suppliers, vendors, and others. Also, the platform attaches...
Let us know if you want to have a quick chat with our team over here at Rocket.Chat to go through the most important advantages Rocket.Chat holds over Webex.
We have no reviews of StackStats.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Indie hackers also leverage collaboration tools like Nextcloud for file sharing and team projects, and Mattermost or Rocket.Chat as self-hosted alternatives to Slack. These tools empower remote teams and foster efficient communication... - Source: dev.to / over 1 year ago
Communication tools such as Mattermost and Rocket.Chat support team collaboration. - Source: dev.to / over 1 year ago
Rocket.Chat is an open source communication platform that allows teams to collaborate in real-time. It supports text, voice, and video communication and integrates with various other tools and services. Learn more about Rocket.Chat on... - Source: dev.to / over 2 years ago
I'm working on 3 products now: 1. FormBeep(https://formbeep.com) at $38 MRR now - A form to Whatsapp tool. Stack is mainly CF workers with Clerk Auth. 2. SlashLink(https://slashlink.app) $0 - A simple pay as you go amazon link localizer.... - Source: Hacker News / 2 days ago
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Mattermost is an open source alternative to Slack.
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Analytics and data platform for DeFi apps
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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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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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