VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Tool details checked August 23, 2026
Tool Comparison
InsideArbitrage vs Insider Monitor
Start here
InsideArbitrage
Free • From $100/mo · Web
- You want news, alerts, and calendar.
Pick Insider Monitor instead if
Insider Monitor
Free · Web
- Delayed quotes won't cut it; you need real-time data
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
InsideArbitrage and Insider Monitor cover a lot of the same ground (2 shared categories, insider data and regulatory filings monitoring), so for the basics you won't go far wrong with either. InsideArbitrage simply does more: 17 categories to Insider Monitor's 2, including news, alerts, and calendar. Insider Monitor counters by being completely free.
What readers say
InsideArbitrage
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Insider Monitor
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Key differences at a glance
- Real-time data
- Insider Monitor
- Broader coverage
- InsideArbitrage17 vs 2 categories
- Free plan
- Both
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • From $100/mo | Free |
Free tier | Yes | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | No | No |
Broker sync | No | — |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 17 | 2 |
Regions | — | North America |
| Data & capabilities | ||
Data quality | — | Latency: Real-time and Timezone: America/New_York |
Capabilities | Universe builder | — |
| Try it | Visit InsideArbitrage | Visit Insider Monitor |
Where each one shines
What InsideArbitrage and Insider Monitor each do best.ShowHide
Where each one shines
What InsideArbitrage and Insider Monitor each do best.What InsideArbitrage does best
- Track announced mergers, spreads, calendars, deal updates and potential deals.
- Filter news, SEC filings and social posts for premium tracked-deal symbols.
- Research insider activity through transaction pages, weekly articles, cluster-buy screens and insider rankings.
- Follow buybacks, spinoffs, CVRs, tender offers, reverse splits, activist campaigns and management changes.
- Use 13F, 13D, 13G and Form 4 data for institutional and insider ownership context.
What Insider Monitor does best
- Browse a real-time insider table with purchases, sales, filing times, issuer details, insider roles, values, and SEC links.
- Officer cluster-buy reports to find tickers bought by multiple corporate officers over the past two weeks.
- Review weekly and monthly top-10 lists for the largest insider purchases when looking for high-value Form 4 activity.
- Direct access to company and trader pages for per-issuer and per-insider transaction history, monthly summaries, year summaries, CIK references, and SEC source links.
- Industry views to compare Form 4 filing counts across broad industry divisions since 2020.
Every detail we compared
Every tracked attribute for InsideArbitrage and Insider Monitor, side by side.ShowHide
Every detail we compared
Every tracked attribute for InsideArbitrage and Insider Monitor, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksClosed-End Funds |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | Not specified | North America |
Coverage details | Identifiers: Ticker and CIK | Countries: USIdentifiers: Ticker |
| Data | ||
Data freshness | Not specified | Real-time |
| Plans & trust | ||
Capability signals | Universe builder | Not specified |
Vendor & support | InsideArbitrageSupport: Email | Insider MonitorSupport: Email |
Curation ratings | Methodology 3/5Reliability 3/5UX 4/5 | Methodology 2/5Reliability 3/5UX 3/5 |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | Free“Public Articles and Data” | Free |
| Entry paid plan | $100/mo“Premium - Annual” | — |
| Top plan | $150/mo“Premium - Monthly” | — |
Questions we keep getting
What's the difference between InsideArbitrage and Insider Monitor?
InsideArbitrage leans toward news, alerts, and calendar, while Insider Monitor puts more weight on insider data and regulatory filings monitoring. They overlap in 2 categories, so for most people it comes down to workflow preference and price.
How much do InsideArbitrage and Insider Monitor cost?
Good news: both InsideArbitrage and Insider Monitor have free plans, so you can run them side by side and only pay if you hit a wall.
Should I choose InsideArbitrage or Insider Monitor?
It depends on what you're after. Pick InsideArbitrage if news and alerts matter to you; go with Insider Monitor if you prefer its overall approach. And if you only need the basics both share, let price decide.
What asset classes do InsideArbitrage and Insider Monitor cover?
Both cover stocks. InsideArbitrage also handles ETFs. Insider Monitor adds closed-end funds on top.
Does InsideArbitrage or Insider Monitor have real-time data?
Insider Monitor offers real-time data, which matters if you trade actively. InsideArbitrage runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Which has a better stock screener: InsideArbitrage or Insider Monitor?
InsideArbitrage has a stock screener for surfacing ideas; Insider Monitor doesn't, and focuses its energy elsewhere.
Can I track my portfolio with InsideArbitrage or Insider Monitor?
InsideArbitrage handles portfolio tracking. Insider Monitor is really a research tool; you'd track your portfolio elsewhere.
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Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.