InsiderAct vs Finviz: Which Tracks Insider Trading Better?

Finviz — Best for All-in-One Stock Screening

Finviz built its reputation on a single, densely packed screener page where you can filter thousands of stocks by technical indicators, fundamental ratios, analyst ratings, and more — all for free. The insider trading feed is one of many data layers in this ecosystem, not the centerpiece. You can see recent insider transactions in the “Insider Trading” tab on any stock page, and Finviz Elite adds real-time access and more advanced filtering.

The practical limitation is that Finviz treats insider data as a list, not as signals. You see who bought and sold, the dollar amounts, and the dates — but the platform does not automatically identify when multiple insiders are buying the same stock within a short window, or when a purchase occurs after a meaningful price decline. That pattern recognition requires manual work. For investors who spend most of their time on technical or fundamental analysis and want insider activity as a supplementary check, that trade-off is reasonable. Finviz Elite at $25/month is competitive if you're already paying for the full screener capability.

• ✓Powerful free tier — technical and fundamental screening without paying
• ✓Insider transaction feed included alongside charts and financials
• ✓Best-in-class fundamental and technical screener in a single dashboard
• ✗Insider data is a secondary feature — no cluster or dip pattern detection
• ✗Real-time insider data requires Elite subscription ($25/month)
• ✗High information density — interface can overwhelm investors new to screening

Best for: Investors who already use Finviz for technical or fundamental screening and want insider data as one more layer in the same workflow — not for investors whose primary lens is insider activity.

InsiderAct — Best for Signal-First Insider Research

InsiderAct takes the opposite approach: everything in the platform is organized around making insider signals easy to find. The Signals page aggregates cluster buys (two or more insiders independently buying the same stock within 14 days), large open-market purchases ($100k+), buying-the-dip events (purchases during a price decline), and blue-chip insider buying — all filtered to transaction code “P,” meaning voluntary open-market purchases with personal cash rather than option exercises or stock grants.

The stock chart view overlays every Form 4 transaction directly on the price history, so you can immediately see whether insider buying preceded or followed a price move. Watchlist alerts are available on the free tier — you do not need to upgrade to Pro to receive notifications when an insider at a company you follow files a new Form 4. The main constraint is US market coverage only, and there is no fundamental or technical screening layer.

• ✓Cluster buy detection automatically surfaces multiple-insider buying events
• ✓Stock price chart overlaid with insider transaction markers for context
• ✓Watchlist alerts available on the free tier — no paid subscription required
• ✓Pre-filtered signals reduce research time significantly
• ✗Covers US-listed companies only — no international markets
• ✗No fundamental or technical screening — insider data only
• ✗No options flow, dark pool, or hedge fund tracking data

Best for: Investors who treat insider activity as the primary input to their research process and do not need a built-in fundamental or technical screener alongside it.

Which should you use?

How you make the decision comes down to your existing workflow:

• 1
  You need technical indicators + insider data together: Use Finviz. The fundamental and technical screener is best in class, and the insider feed gives you a useful supplementary signal within the same interface.
• 2
  You already pay for Finviz Elite and want better insider analysis: Consider adding InsiderAct — it provides cluster detection and chart overlays that Finviz does not offer, at a different price point ($9.99/month).
• 3
  Insider signals are your primary research input: InsiderAct is sufficient on its own. Cluster buys, large purchases, and buying-the-dip events are surfaced automatically without manual filtering.