VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Tool details checked August 23, 2026
Tool Comparison
13F Insight vs InsideArbitrage
Pick 13F Insight if
13F Insight
Free • Contact for pricing · Web · API
- You want an API so you can script or automate things
- You want AI research and education.
- You're a long-term investor who cares more about fundamentals than headlines
Pick InsideArbitrage if
InsideArbitrage
Free • From $100/mo · Web
- You want calendar, corporate actions & special situations, and dividends.
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
13F Insight and InsideArbitrage cover a lot of the same ground (8 shared categories, including data visualizations, watchlist, and institutional ownership), so for the basics you won't go far wrong with either. InsideArbitrage simply does more: 17 categories to 13F Insight's 10, including calendar, corporate actions & special situations, and dividends. 13F Insight counters by being completely free.
What readers say
13F Insight
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InsideArbitrage
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Key differences at a glance
- Asset coverage
- 13F InsightAdds options and bonds
- Broader coverage
- InsideArbitrage17 vs 10 categories
- API access
- 13F Insight
- 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 • Contact for pricing | Free • From $100/mo |
Free tier | Yes | Yes |
Free trial | — | — |
Plan limits | 3 limits: Free: watchlist items: 5, Standard: watchlist items: 20 +1 more | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | Yes | No |
Broker sync | — | No |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | Retail Traders, Pro Retail +3 more | — |
Categories covered | 10 | 17 |
Regions | North America | — |
| Data & capabilities | ||
Capabilities | AI summaries: Filings | Universe builder |
Security | Encryption in transit | — |
| Try it | Visit 13F Insight | Visit InsideArbitrage |
Where each one shines
What 13F Insight and InsideArbitrage each do best.ShowHide
Where each one shines
What 13F Insight and InsideArbitrage each do best.What 13F Insight does best
- Track 13F holdings, Form 4 insider trades, and 13D/G ownership reports in one place.
- Search filing history for more than 30,000 institutional filers, with AUM, holdings, and position-change views.
- Ask the AI Agent questions about a filer, stock, or insider and follow its citations back to the filings.
- Use AI summaries, position-change analysis, and unusual-activity alerts as a first pass.
- Build filer and stock watchlists.
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.
Every detail we compared
Every tracked attribute for 13F Insight and InsideArbitrage, side by side.ShowHide
Every detail we compared
Every tracked attribute for 13F Insight and InsideArbitrage, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFsOptionsBonds | StocksETFs |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Retail TradersPro RetailValue InvestorsGrowth InvestorsAnalysts | Not specified |
Regions | North America | Not specified |
Coverage details | Countries: USIdentifiers: Ticker, CUSIP, and CIK | Identifiers: Ticker and CIK |
| Plans & trust | ||
Security & compliance | Encryption in transit | Not specified |
Capability signals | AI summaries: Filings | Universe builder |
Vendor & support | 13F InsightSupport: Email | InsideArbitrageSupport: Email |
Curation ratings | Not specified | Methodology 3/5Reliability 3/5UX 4/5 |
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 | Freewatchlist items: 5 | Free“Public Articles and Data” |
| Entry paid plan | Subscription“Standard”watchlist items: 20 | $100/mo“Premium - Annual” |
| Top plan | Subscription“Pro”watchlist items: 100 | $150/mo“Premium - Monthly” |
| Custom / enterprise | Contact sales“Enterprise” | — |
Questions we keep getting
What's the difference between 13F Insight and InsideArbitrage?
13F Insight leans toward data visualizations, watchlist, and institutional ownership, while InsideArbitrage puts more weight on news, alerts, and calendar. They overlap in 8 categories, so for most people it comes down to workflow preference and price.
How much do 13F Insight and InsideArbitrage cost?
Good news: both 13F Insight and InsideArbitrage have free plans, so you can run them side by side and only pay if you hit a wall.
Does 13F Insight or InsideArbitrage have an API?
13F Insight has an API for programmatic access and custom integrations. InsideArbitrage doesn't, so you're working through its interface.
Should I choose 13F Insight or InsideArbitrage?
It depends on what you're after. Pick 13F Insight if AI research and education matter to you; go with InsideArbitrage if you'd rather have calendar and corporate actions & special situations. And if you only need the basics both share, let price decide.
What asset classes do 13F Insight and InsideArbitrage cover?
Both cover stocks and ETFs. 13F Insight also handles options and bonds.
Which has a better stock screener: 13F Insight or InsideArbitrage?
InsideArbitrage has a stock screener for surfacing ideas; 13F Insight doesn't, and focuses its energy elsewhere.
Can I track my portfolio with 13F Insight or InsideArbitrage?
InsideArbitrage handles portfolio tracking. 13F Insight is really a research tool; you'd track your portfolio elsewhere.
Keep researching
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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.