DATAROMA adds Investor Holdings, and Insider Data coverage that Letters and Reviews skips.
VOL. XCIV, NO. 247
★ A CURATED DIRECTORY OF FINANCIAL TOOLS ★
PRICE: 5 CENTS
Saturday, December 13, 2025
Tool Comparison
DATAROMA vs Letters and Reviews comparison
Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.
Quick takeaways
Letters and Reviews includes Blogs categories that DATAROMA omits.
In depth comparison
DATAROMA
dataroma.com
Hands-on review
Free resource that tracks Superinvestor 13F filings and insider Form 4 activity. Features include manager portfolios, aggregated holdings, insider trade feeds, and stock idea rankings. Quotes are sourced via Intrinio, with charts and fundamentals powered by TradingView. The site requires no login or account to use.
Platforms
Web
Pricing
Free
Quick highlights
- Tracks portfolios of well-known 'Superinvestors' through SEC 13F filings, with detailed views of holdings, buys/sells, and quarter-to-quarter activity.
- Stock pages display Superinvestor ownership counts, a defined 'Hold Price' (quarter-end close), insider transaction totals over the past six months, plus TradingView charts and fundamentals.
- Real-time insider transaction feed based on SEC Form 4 filings, with filterable listings.
- ‘RealTime’ activity feed highlighting notable Superinvestor trades as they are reported.
- S&P 500 'Value Ranking' grid for idea generation and stock discovery.
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Letters and Reviews
lettersandreviews.blogspot.com
Free, personal curation site that aggregates **fund manager letters**, tickers mentioned in those letters, and **quarterly 13F** filer lists the author follows. Each quarter page links to original letters and maps tickers to quick‑reference pages; some 13F pages embed holdings tables and activity (new/increased/decreased/sold) for many managers. Also includes a small **Podcasts** list. No accounts, alerts, exports, or API-think link‑hub for primary sources rather than a data platform.
Categories
Platforms
Web
Pricing
Free
Quick highlights
- Quarterly **Fund Manager Letters** pages with the fund name, date, and a ‘Stocks Mentioned’ column (tickers link out for quick lookup).
- Quarterly **13‑F pages** the author reads, with many entries including holdings tables and position‑change flags (e.g., NEW / Sold Out / % of portfolio).
- Lightweight **About** page clarifies the goal: stock‑idea discovery from letters; author shares links and invites tips via @_iinvested.
- A small **Podcasts** page curating investing/finance episodes the author plans to re‑listen to.
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Where they differ
DATAROMA
Distinct strengths include:
- Tracks portfolios of well-known 'Superinvestors' through SEC 13F filings, with detailed views of holdings, buys/sells, and quarter-to-quarter activity.
- Stock pages display Superinvestor ownership counts, a defined 'Hold Price' (quarter-end close), insider transaction totals over the past six months, plus TradingView charts and fundamentals.
- Real-time insider transaction feed based on SEC Form 4 filings, with filterable listings.
- ‘RealTime’ activity feed highlighting notable Superinvestor trades as they are reported.
Letters and Reviews
Distinct strengths include:
- Quarterly **Fund Manager Letters** pages with the fund name, date, and a ‘Stocks Mentioned’ column (tickers link out for quick lookup).
- Quarterly **13‑F pages** the author reads, with many entries including holdings tables and position‑change flags (e.g., NEW / Sold Out / % of portfolio).
- Lightweight **About** page clarifies the goal: stock‑idea discovery from letters; author shares links and invites tips via @_iinvested.
- A small **Podcasts** page curating investing/finance episodes the author plans to re‑listen to.
Feature-by-feature breakdown
| Attribute | DATAROMA | Letters and Reviews |
|---|---|---|
Categories Which research workflows each platform targets | Shared: Stock Ideas, 13F Unique: Investor Holdings, Insider Data | Shared: Stock Ideas, 13F Unique: Blogs |
Asset types Supported asset classes and universes | Stocks, ETFs | Stocks, ETFs |
Experience levels Who each product is built for | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Platforms Where you can access the product | Web | Web |
Pricing High-level pricing models | Free | Free |
Key features Core capabilities called out by each vendor | Unique
| Unique
|
Tested Verified by hands-on testing inside Find My Moat | Yes | Not yet |
Editor pick Featured inside curated shortlists | Standard listing | Standard listing |
Frequently Asked Questions
Which workflows do DATAROMA and Letters and Reviews both support?
Both platforms cover Stock Ideas, and 13F workflows, so you can research those use cases in either tool before digging into the feature differences below.
Do DATAROMA and Letters and Reviews require subscriptions?
Both DATAROMA and Letters and Reviews keep freemium access with optional paid upgrades, so you can trial each platform before committing.
How can you access DATAROMA and Letters and Reviews?
Both DATAROMA and Letters and Reviews 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?
DATAROMA differentiates itself with Tracks portfolios of well-known 'Superinvestors' through SEC 13F filings, with detailed views of holdings, buys/sells, and quarter-to-quarter activity., Stock pages display Superinvestor ownership counts, a defined 'Hold Price' (quarter-end close), insider transaction totals over the past six months, plus TradingView charts and fundamentals., and Real-time insider transaction feed based on SEC Form 4 filings, with filterable listings., whereas Letters and Reviews stands out for Quarterly **Fund Manager Letters** pages with the fund name, date, and a ‘Stocks Mentioned’ column (tickers link out for quick lookup)., Quarterly **13‑F pages** the author reads, with many entries including holdings tables and position‑change flags (e.g., NEW / Sold Out / % of portfolio)., and Lightweight **About** page clarifies the goal: stock‑idea discovery from letters; author shares links and invites tips via @_iinvested..
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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.