InsiderAct vs InsiderScreener: Comparing Insider Signal Detection Tools

InsiderScreener — Best for Global Coverage

InsiderScreener's primary differentiator is breadth. The platform covers 16 markets, which means investors trading European or Asian-listed companies can access insider transaction data in a single interface rather than navigating individual regulatory databases (FCA, AMF, BaFin, and others). The cross-market normalization work is non-trivial — different markets have different filing requirements, transaction type classifications, and reporting windows, and InsiderScreener standardizes these so you can apply consistent filters across geographies.

The platform also has a mature daily email report feature that a number of subscribers rely on for their morning research routine. Cluster buy detection is included, applying similar logic to each market's available data. The limitations for US-focused investors are the higher price (~$24/month vs $9.99/month) and the absence of more granular US signal types — buying-the-dip and blue-chip categories do not appear as distinct signals.

• ✓16-market coverage including US, European, and Asian exchanges
• ✓Cross-market data normalization handles different regulatory filing formats
• ✓Daily email reports are a mature, well-regarded feature
• ✗US-specific signal types (buying-the-dip, blue-chip) are not available
• ✗At ~$24/month, roughly 2.4x more expensive than InsiderAct
• ✗International data may have longer delays due to cross-market processing

Best for: Investors with a global mandate who need insider data across European and Asian markets alongside the US, and who want cross-market data normalized to a consistent format.

InsiderAct — Best for US-Focused Signal Depth

InsiderAct's approach is the inverse of InsiderScreener's: instead of broad market coverage, it goes deep on the US market. By limiting scope to SEC Form 4 filings, InsiderAct can apply more granular signal logic than a cross-market platform needs to. The result is four distinct signal types — cluster buys, large open-market purchases, buying-the-dip (purchases after meaningful price declines), and blue-chip insider buying — each filtered to voluntary open-market transactions with personal cash only (transaction code “P”).

The buying-the-dip and blue-chip signal types are particularly notable because InsiderScreener does not offer equivalent categories. These require understanding the price history relative to the transaction date (for dip detection) and applying large-cap classification logic (for blue-chip), which is easier to implement precisely for a single regulatory source than across 16 different filing formats. The stock chart view, which overlays every insider transaction directly on the price history, is also unique to InsiderAct in this comparison.

• ✓Buying-the-dip and blue-chip signals are unique to InsiderAct — not in InsiderScreener
• ✓Stock chart with insider markers overlaid directly on price history
• ✓At $9.99/month, approximately 60% less than InsiderScreener
• ✓Watchlist alerts available on the free tier
• ✗US-listed companies only — no international market coverage
• ✗Daily email briefs are on the roadmap but not yet available

Best for: US-focused investors who want the broadest signal categorization available — particularly those interested in cluster buys, dip-buying events, and large-cap insider activity as distinct research inputs.

Which should you use?

• 1
  You invest exclusively in US-listed stocks: InsiderAct provides deeper signal categorization at a lower price. The US-only constraint is not a limitation for your strategy, and you benefit from buying-the-dip and blue-chip signals that InsiderScreener does not offer.
• 2
  You invest across multiple geographies: InsiderScreener is the right choice. It is the only tool in this comparison that covers European and Asian insider data in a normalized format. The 60% price premium is justified by the additional market coverage.
• 3
  You want the cheapest option with cluster detection: InsiderAct at $9.99/month is the lower-cost option that includes cluster buy detection. InsiderScreener is more expensive and adds value primarily through international coverage rather than additional US signal depth.