VOL. XCIV, NO. 247

★ A CURATED DIRECTORY OF FINANCIAL TOOLS AND RESOURCES ★

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Friday, December 26, 2025

Tool Comparison

InsideArbitrage vs Marketgenius comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

InsideArbitrage adds News, Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Splits, 13F, 13D/13G, Regulatory Filings Monitoring, Screeners, Portfolio, Watchlist, Newsletters, Videos, Playbooks & Case Studies, and PDF Annotation coverage that Marketgenius skips.

Marketgenius includes Investor Holdings, Financials, Valuation Models, Scores, and Short Interest categories that InsideArbitrage omits.

In depth comparison

InsideArbitrage

insidearbitrage.com

Event‑driven research platform by Asif Suria focused on merger arbitrage, insider transactions, spinoffs, buybacks, activists, and related special situations. Premium includes tools like the Merger Arbitrage Tool, CVR database, buyback & spinoff trackers, premium screens (IA Score, cluster buys, ‘double dipper’), ‘Deals‑in‑the‑Works’ and deal calendars. IA Professional adds pro‑only features (e.g., CVR outcomes, activist tracker, reverse‑splits tracker, Insider Performance Score) and multi‑seat licensing.

Platforms

Web

Pricing

FreeSubscription

Quick highlights

Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.
Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards.

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Marketgenius

marketgenius.app

Mobile-friendly stock discovery site centered on heatmaps and simple stock dashboards. The site markets "real-time" heatmaps for major indices and superinvestor portfolios and provides per-stock fundamentals/valuation stats plus a couple of simple scores. No public pricing, paid plans, or API docs found on the vendor site as of 2025-12-26; site appears ad-supported (Google AdSense) per privacy policy.

Platforms

Web

Pricing

Free

Quick highlights

Real-time stock heatmaps tracking major indices and "superinvestor portfolios" (site shows 700+ stocks tracked and 6 portfolios).
Heatmaps support multiple metrics beyond % change (e.g., price-to-book (MRQ), profit margin gross (MRQ)).
Per-stock pages include valuation + fundamentals (e.g., market cap, P/E, PEG, revenue (TTM), EPS, cash flow, margins).
Stock pages include ownership + positioning stats (institutional ownership, insider ownership, short interest) and dividend yield/dates.
Simple indicators/scores on stock pages (Industry Safety Score, Net Profitability Score) with peer comparison table.

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Where they differ

InsideArbitrage

Distinct strengths include:

News Alerts Calendar Acquisitions Spin-offs Buybacks & Authorizations Splits 13F

Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.

Marketgenius

Distinct strengths include:

Investor Holdings Financials Valuation Models Scores Short Interest

Real-time stock heatmaps tracking major indices and "superinvestor portfolios" (site shows 700+ stocks tracked and 6 portfolios).
Heatmaps support multiple metrics beyond % change (e.g., price-to-book (MRQ), profit margin gross (MRQ)).
Per-stock pages include valuation + fundamentals (e.g., market cap, P/E, PEG, revenue (TTM), EPS, cash flow, margins).
Stock pages include ownership + positioning stats (institutional ownership, insider ownership, short interest) and dividend yield/dates.

Feature-by-feature breakdown

Attribute	InsideArbitrage	Marketgenius
Categories Which research workflows each platform targets	Shared: Dividends, Insider Data, Institutional Data, Data Visualizations, Blogs Unique: News, Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Splits, 13F, 13D/13G, Regulatory Filings Monitoring, Screeners, Portfolio, Watchlist, Newsletters, Videos, Playbooks & Case Studies, PDF Annotation	Shared: Dividends, Insider Data, Institutional Data, Data Visualizations, Blogs Unique: Investor Holdings, Financials, Valuation Models, Scores, Short Interest
Asset types Supported asset classes and universes	Stocks, ETFs	Stocks
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate
Platforms Where you can access the product	Web	Web
Pricing High-level pricing models	Free, Subscription	Free
Key features Core capabilities called out by each vendor	Unique Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems. Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map. Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks). Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes. Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards. Event‑driven monitor & M&A news feed; earnings calendar; tender‑offers tracker; activist‑campaign tracker; C‑suite transitions tool.	Unique Real-time stock heatmaps tracking major indices and "superinvestor portfolios" (site shows 700+ stocks tracked and 6 portfolios). Heatmaps support multiple metrics beyond % change (e.g., price-to-book (MRQ), profit margin gross (MRQ)). Per-stock pages include valuation + fundamentals (e.g., market cap, P/E, PEG, revenue (TTM), EPS, cash flow, margins). Stock pages include ownership + positioning stats (institutional ownership, insider ownership, short interest) and dividend yield/dates. Simple indicators/scores on stock pages (Industry Safety Score, Net Profitability Score) with peer comparison table. Free stock code validators for CFI, CUSIP, ISIN, LEI, SEDOL, and WKN codes.
Tested Verified by hands-on testing inside Find My Moat	Not yet	Not yet
Editor pick Featured inside curated shortlists	Standard listing	Standard listing

Frequently Asked Questions

Which workflows do InsideArbitrage and Marketgenius both support?

Both platforms cover Dividends, Insider Data, Institutional Data, Data Visualizations, and Blogs workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do InsideArbitrage and Marketgenius require subscriptions?

Both InsideArbitrage and Marketgenius keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access InsideArbitrage and Marketgenius?

Both InsideArbitrage and Marketgenius prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

InsideArbitrage differentiates itself with Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems., Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map., and Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks)., whereas Marketgenius stands out for Real-time stock heatmaps tracking major indices and "superinvestor portfolios" (site shows 700+ stocks tracked and 6 portfolios)., Heatmaps support multiple metrics beyond % change (e.g., price-to-book (MRQ), profit margin gross (MRQ))., and Per-stock pages include valuation + fundamentals (e.g., market cap, P/E, PEG, revenue (TTM), EPS, cash flow, margins)..

Keep exploring

Stay on top of related tools

Browse the categories and profiles that overlap most with this comparison to round out your shortlist.