Koyfin vs Seeking Alpha vs Simply Wall St: what each one is actually for
Every "best stock research tool" list ranks these three against each other as if they do the same thing. They do not. One is a data terminal, one is an opinion marketplace, and one is a picture. Confusing them is how people end up paying for all three and using none.
I come at this from the software side. I build screeners and backtests, so what I want out of a research tool is narrow and specific: get me from a ticker to the three or four facts that would change my mind, in under a minute, without a login wall in the middle.
The one-line version
- Koyfin is a fast, cheap terminal for people who already know what data they want. Charts of fundamentals over time, comparisons, macro, estimates.
- Seeking Alpha is thousands of people arguing about stocks, plus a quantitative grading layer on top. You are buying the arguments and the grades, not data.
- Simply Wall St turns a company into one visual snapshot a beginner can read in thirty seconds. That is a real skill and it is underrated.
If you cannot say which of those three sentences describes your gap, the answer is that you do not need any of them this month.
Koyfin: for when the data is the bottleneck
The reason people say Koyfin is a cheap Bloomberg is that it does the one Bloomberg thing most retail investors actually need: plot any financial series over time and compare it to another one, fast.
Revenue growth against gross margin, five years, three competitors, one chart. Estimate revisions next to price. Yield curves without opening four government sites. If you have ever found yourself building a spreadsheet by hand-copying numbers out of a 10-K, this is what removes that afternoon from your life.
Where it is wrong for you: if you do not already know which series matters, a tool that can plot anything is paralysing. Koyfin rewards a specific question. It does not generate one.
The free tier does more than you expect
I would use the free tier until you hit a specific wall you can name out loud. "I want more saved dashboards" is a real reason to upgrade. "It seems powerful" is not.
Seeking Alpha: you are buying disagreement
The mistake is treating Seeking Alpha as a data source. It is a marketplace of arguments, and its real value is adversarial: for any position you are about to take, someone there has written the best available case against it.
That is genuinely useful and it is a discipline more than a product. Before a swing entry I am not looking for a bull thesis, I have one, that is why I am here. I am looking for the thing I have not thought of. A pending trial result. A refinancing. A customer concentration number that makes the chart irrelevant.
The quantitative grading layer is the other half. Treat the grades as a screen, not a verdict. A grade is a compression of many factors into one letter, and compression loses the part you needed.
The honest caution, and it applies to the whole category: contributors can hold positions in what they write about, disclosure quality varies, and a persuasive article is not evidence. The same skepticism I apply to my own backtests applies double to a stranger's thesis with a price target in the headline.
Simply Wall St: the one I recommend to friends
When someone in my dorm asks me how to look at a company, I do not send them to a terminal. I send them to Simply Wall St, because turning a balance sheet into a picture is a legitimately hard design problem and they solved it.
The snowflake visual gets mocked by professionals, which I think is a status reflex rather than a critique. For someone four months into investing, a single glance that says "this company is expensive, growing, and carrying a lot of debt" is more useful than forty ratios they cannot yet rank.
Where it stops working: the moment you can read a cash flow statement yourself, the simplification becomes a cost rather than a feature. Simply Wall St is a great first tool and a poor last tool. That is a compliment, most tools are neither.
| You are | Use | Why |
|---|---|---|
| New, want to understand a company at all | Simply Wall St | One readable picture beats forty ratios you cannot rank yet |
| Technical trader wanting a fundamental sanity filter | Koyfin free | Revenue and margin trend in one chart, thirty seconds, done |
| Holding for months and afraid of what you missed | Seeking Alpha | You are buying the strongest argument against your own position |
| Building your own screens in code | None of them yet | Free APIs plus your own harness. Pay only when data quality bites |
How I actually use research as a technical trader
My process is price-first, and I want to be honest that fundamentals in my workflow are a veto, not a trigger. I do not enter because a company is cheap. I decline to enter when there is an event on the calendar my chart cannot see.
Concretely, three checks before any swing entry, about ninety seconds total:
- Is there an earnings date inside my expected hold? If yes, either the position gets sized down or the setup gets skipped. A gap through a stop is not a stop.
- Is the revenue and margin trend going the wrong way? Not disqualifying on its own, but it changes how much heat I am willing to sit through.
- Is there something scheduled I do not know about? Trial data, lockup expiry, an index rebalance, a refinancing.
That is the entire fundamental component of a technical process, and it is the reason I do not need the most expensive tier of anything. My edge, such as it is, is in sizing and in refusing to trade setups that failed out-of-sample testing. No subscription supplies either of those.
Pay for at most one of these at a time, and only after a free tier has failed you in a way you can describe in a sentence.
Start with Simply Wall St if companies still look like noise. Move to Koyfin when you know which series you want and hate copying it by hand. Add Seeking Alpha only if you hold long enough for a thesis to break, which most swing traders do not.
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