InsiderAct vs InsiderArbitrage: Cluster Buy Comparison 2026
InsiderArbitrage is an established platform for tracking SEC Form 4 insider transactions, known for its institutional-grade data and quant features. InsiderAct is a newer tool built around one thesis: automatic cluster detection makes the signal obvious without manual work. This comparison covers what each platform does well and where each falls short.
Quick Answer
InsiderAct is free to start and detects cluster buys automatically — no manual filtering required. InsiderArbitrage is an established paid platform with broader quant features and a longer track record. For beginners or value-focused investors who want cluster signals without a subscription, InsiderAct wins on accessibility. For quant workflows requiring raw data and custom screening, InsiderArbitrage has the edge.
Feature Comparison
| Feature | InsiderAct | InsiderArbitrage |
|---|---|---|
| Cluster Detection | Automatic (2+ insiders / 30 days) | Manual filter required |
| Price | Free / $19/mo Pro | Paid subscription (~$39+/mo) |
| Real-time Alerts | Free tier (email) | Premium tier |
| Data Source | SEC EDGAR (hours delay) | SEC EDGAR |
| History (free) | 7 days | Limited / none |
| History (paid) | 90 days | Extended |
| Ease of Use | Beginner-friendly | Quant/advanced |
| Mobile UI | Responsive | Desktop-oriented |
InsiderAct: Automatic Cluster Detection
- →Auto-detects clusters: 2+ insiders buying same stock within 30 days
- →Real-time EDGAR ingestion — signals appear within hours of filing
- →Cluster scored automatically — no manual filtering required
- →Free tier includes today's signals, 7-day history, 10 watchlist items with email alerts
- →Pro at $19/month: 90-day history, 50 watchlist items, real-time alerts
- →Beginner-friendly UI, mobile-responsive
InsiderArbitrage: Established Quant Platform
- →Established platform with institutional reputation
- →Broader quant features: custom screeners, raw data export
- →Longer track record — used by professional investors
- →Paid subscription required to access most features
- →Desktop-oriented, assumes quantitative background
Which Wins?
InsiderAct wins on:
- ✓Free tier with no paywall on core signals
- ✓Automatic cluster detection — no manual filtering
- ✓Real-time email alerts on the free plan
- ✓Mobile-responsive UI
InsiderArbitrage wins on:
- ✓Established reputation and longer track record
- ✓Advanced quant features and custom screeners
- ✓Raw data access and export
- ✓Preferred by professional quantitative investors
Try InsiderAct Free
The free tier includes today's cluster buy signals, 7-day history, and watchlist with email alerts.
- ✓Today's cluster buy signals — automatically detected
- ✓7-day history of insider transactions
- ✓Watchlist with email alerts (10 stocks free)
- ✓No credit card required
Pro at $19/month: 90-day history, 50 watchlist items, real-time alerts.
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Pricing accurate as of June 2026; check each platform for current rates. This article is for informational and educational purposes only and is not financial advice.