A new kind of market terminal — built for people who actually enjoy this stuff
Stock Citadel was built from scratch by John Proncko — a one-person operation fueled by a genuine passion for markets and a frustration with how clunky and expensive most financial tools are.
The idea was simple: build a cool, casual way to follow the markets that doesn't feel like a Bloomberg terminal you need a finance degree to operate — but still gives you the depth when you want it. Something that feels alive, fast, and actually fun to use.
Every line of code, every feature, every design decision was made by one person who just really loves this space. No VC backing. No team of 50 engineers. Just a guy from rural Pennsylvania who moved to New York, studied economics, and couldn't stop tinkering.
FOUNDER · DEVELOPER · SITE CREATOR
You don't need to be a day trader to care about what the market is doing. Stock Citadel is built for people who want real data without the noise — whether you check it once a week or every morning.
Fundamentals, insider trades, earnings calendars, SEC filings, analyst ratings — all the pro-level data, accessible without a $300/month subscription.
We believe in patient, informed investing over reactive trading. The tools here are designed to help you think — not to push you into trades.
This isn't a startup with a roadmap deck and investor meetings. It's a passion project that gets better every week because the person building it actually uses it every day.
Our home base on Reddit is r/passiveinvesting — a community for investors who think long-term. Ask questions, share ideas, or just lurk and learn. We own and moderate that subreddit and it's where the real conversations happen.
Visit r/passiveinvesting on Reddit