Quantral vs OpenInsider: every insider filing, or the buys that matter in context

OpenInsider has been the free default for insider trading data since 2011, and it earns that spot. It pulls every insider filing from the SEC, lays it out in a clean table, and lets you slice it any way you like: by role, by trade size, by how much an insider added to their stake, by industry. It flags cluster buys, where several insiders at one company buy around the same time, and it shows how each stock did one day, one week, one month and six months after the trade. If you want the raw filings, OpenInsider is hard to beat, and it costs nothing.

Quantral asks a narrower question. It keeps only the insider trades that say something about the stock, which are purchases made on the open market, and shows them on the same company page as Congress trades and what finance X, Reddit and Substack are saying. All of that rolls into one score per stock, so you see what an insider buy means next to everything else you would check anyway.

At a glance

The core difference: a filing list or a read on the stock

An insider filing tells you who traded, what, and at what price. OpenInsider shows that for every filing and leaves the interpretation to you. If you screen insider data, that is what you want: the full list, sales included, with the filters in your hands.

Most investors have a different problem. They are looking at one stock and want to know whether anything worth knowing is happening around it. An insider buy is one piece of that. Whether members of Congress bought the same stock, and whether the people with the best track records on finance X and Reddit agree, are other pieces. Quantral puts those pieces on one company page and turns them into a single 0–100 score, so you read one number and a plain-English reason instead of cross-checking three sites.

Feature by feature

What each one shows

OpenInsider shows every transaction an insider reports: open-market purchases and sales, grants from the company, gifts, tax withholding, option exercises and more. Each one gets its own row and code, for every company that files.

Quantral shows only open-market purchases by officers, directors and 10% owners. Sales and pre-scheduled plan trades are left out, because a sale happens for many reasons (taxes, a house, spreading out wealth, a schedule set months ago) and tells you little about the company. When an insider spends their own money on the open market, the likely reason is that they think the stock is cheap. The trade-off is plain: you will not see sales in Quantral, and if selling pressure matters to your research, OpenInsider is where to look.

Screens and lists

This is OpenInsider's strongest ground. It has ready-made lists for the latest cluster buys, penny stock buys, CEO and CFO purchases over $25,000, and the top purchases and sales of the day, week and month, plus a full screener with filters for role, trade value, ownership change and industry.

Quantral has no insider screener. Insider buys show up in the app's feed and on each company page, and companies with buys in the last 30 days carry an Insider buying marker. Quantral is built for reading one stock at a time, and a screener is the wrong tool for that.

What happened after the trade

OpenInsider shows how each stock moved 1 day, 1 week, 1 month and 6 months after an insider trade, right in the table. It is a quick way to see whether a buy has worked out so far.

Quantral does not grade insiders or rank them. An insider might buy their own company's stock once or twice in a career, so a personal track record would say little. Instead, each buy feeds into the stock's score next to the other sources, and the company page shows the price and score trends over time.

Context

Here the two differ most. OpenInsider covers insider data and nothing else. Quantral shows an insider buy on the same page as Congress trades, where members of the House and Senate are graded like any other voice, and as the crowd on finance X, Reddit and Substack, weighted by who has been right before. You would read an insider buy that lines up with a member's purchase and a credible bullish case on X differently from one that stands alone.

Price

OpenInsider is free and supported by ads, with no account needed. Quantral is $14.99 a month, or $9.99 a month billed yearly, after a 7-day free trial. You pay for the context: the Congress data, the graded crowd, and the score that puts them together.

Who OpenInsider is best for

OpenInsider is the better pick if insider data is the job. Anyone who screens for cluster buys, tracks insider selling, or wants every filing for a company going back years will get more out of it than out of Quantral, and it costs nothing. It also covers every company that files with the SEC, including the smallest ones.

Who Quantral is best for

Quantral is the better pick if you are researching a stock and an insider buy is one input among several. It shows you the buy, who made it and how much they spent, and puts it next to Congress trades and the crowd's view in one score. You can see how that works on the insider trading tracker page.

Is Quantral an OpenInsider alternative?

For raw insider data, no. Quantral shows only open-market buys, has no screener and no cluster buy list, and covers the companies it tracks rather than every SEC filer. If that is what you use OpenInsider for, keep using it.

For deciding what an insider buy means, yes. Quantral works as an OpenInsider alternative when your question is whether a buy deserves your attention. It answers with Congress trades and the graded crowd on the same page, and one score at the end. You can also run both, OpenInsider to spot the filing and Quantral to see the rest of the picture.

Common questions

What is OpenInsider?

OpenInsider is a free website that republishes insider trading filings from the SEC. When a company's officers, directors or large owners buy or sell its stock, they have to report it, and OpenInsider collects those reports into searchable tables, screens and lists such as the latest cluster buys.

Is OpenInsider legit?

Yes. It has run since 2011, it is free, and its data comes from public SEC filings, which it links to on each row. It shows what insiders did and leaves the decision to you.

Is OpenInsider free?

Yes. OpenInsider is free to use and supported by ads, with no account required.

Does Quantral show insider selling?

No. Quantral shows only open-market purchases by officers, directors and 10% owners. Sales and pre-scheduled plan trades are left out, because they happen for many reasons that have little to do with the company's prospects. For insider sales, OpenInsider has full lists.

Can I use both?

Yes. Use OpenInsider to spot a filing or a cluster of buys, then check Quantral to see whether Congress and the crowd's most accurate voices lean the same way before you dig in.

Choosing between them

If you want to screen insider data yourself, for free, OpenInsider does that job better than anything else we have seen. If your harder question is what one insider buy means for a stock you are watching, Quantral answers it with the buy, Congress and the crowd in one score. Start with the insider trading tracker, and for the other public sources worth watching, read alternative data sources.

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Quantral surfaces signals and context from public sources to support your own research. Nothing here is financial advice or a recommendation to buy or sell. OpenInsider details are current as of September 2026; check OpenInsider directly for the latest.