
FinViz
Simply Wall Street
Seeking Alpha
TradingView
Investing.com
Yahoo! Finance
Morningstar
Koyfin provides tools to help investors research stocks and other asset classes through dashboards and charting.

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, Koyfin should be more popular than StackStats.app. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | koyfin.com | stackstats.app |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States · 2016 | Startup from the United Arab Emirates · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Koyfin is a global market analytics platform for researching and understanding markets. From bottom-up fundamentals to top-down macro analysis, our platform, powered by Capital IQ, is trusted by more than 500,000 investors. We offer global coverage of equities, ETFs, Mutual Funds, analyst...
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.


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


Overall verdict
Why this product is good
Recommended for
Koyfin is recommended for financial analysts, portfolio managers, individual investors, and anyone who requires detailed data analytics and visualizations for making informed investment decisions.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Koyfin Demo, 2023
More videos
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 Koyfin 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 Koyfin and StackStats.app. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Thanks for the link, that was useful. I found there about koyfin.com which is for free and gives the summary info that I was after. Really spot on. Source: about 4 years ago
My stock dashboard (koyfin.com) says 15.33% short interest. Which is correct? Also I think that number was around 25% recently so I guess that's come down? Source: almost 5 years ago
Personally: For individual stocks: Koyfin.com (good for visualizing US ETFs as well but you won't have access to those anyway). Source: about 5 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 / 1 day ago
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