VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Tuesday, October 28, 2025

Home My Collections

Tool Comparison

Letters and Reviews vs WhaleWisdom comparison

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

Quick takeaways

Letters and Reviews adds Blogs coverage that WhaleWisdom skips.

WhaleWisdom includes Institutional Data, and Investor Holdings categories that Letters and Reviews omits.

In depth comparison

Letters and Reviews logo

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.

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.

Community votes (overall)

0% upvotes 0% downvotes
You haven't voted yet
View full profileVisit site
WhaleWisdom logo

WhaleWisdom

whalewisdom.com

Aggregates 13F filings and insider transactions so investors can follow institutional positioning, build watchlists, and backtest crowding strategies.

Platforms

WebAPI

Pricing

FreeSubscription

Quick highlights

  • Rank hedge fund managers by performance, risk-adjusted returns, and recent filings.
  • Pull 13F, 13D/G, insider trades, and sector exposures into custom portfolios and alerts.
  • API and bulk downloads available for quantitative workflows and screening.
  • Tools for cloning strategies, monitoring crowding, and tracking portfolio overlaps over time.

Community votes (overall)

0% upvotes 0% downvotes
You haven't voted yet
View full profileVisit site

Where they differ

Letters and Reviews

Distinct strengths include:

Blogs
  • 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.

WhaleWisdom

Distinct strengths include:

Institutional DataInvestor Holdings
  • Rank hedge fund managers by performance, risk-adjusted returns, and recent filings.
  • Pull 13F, 13D/G, insider trades, and sector exposures into custom portfolios and alerts.
  • API and bulk downloads available for quantitative workflows and screening.
  • Tools for cloning strategies, monitoring crowding, and tracking portfolio overlaps over time.

Feature-by-feature breakdown

AttributeLetters and ReviewsWhaleWisdom
Categories

Which research workflows each platform targets

Shared: Stock Ideas, 13F

Unique: Blogs

Shared: Stock Ideas, 13F

Unique: Institutional Data, Investor Holdings

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, API

Pricing

High-level pricing models

Free

Free, Subscription

Key features

Core capabilities called out by each vendor

Unique

  • 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.

Unique

  • Rank hedge fund managers by performance, risk-adjusted returns, and recent filings.
  • Pull 13F, 13D/G, insider trades, and sector exposures into custom portfolios and alerts.
  • API and bulk downloads available for quantitative workflows and screening.
  • Tools for cloning strategies, monitoring crowding, and tracking portfolio overlaps over time.
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 Letters and Reviews and WhaleWisdom 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 Letters and Reviews and WhaleWisdom require subscriptions?

Both Letters and Reviews and WhaleWisdom keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access Letters and Reviews and WhaleWisdom?

Both Letters and Reviews and WhaleWisdom 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?

Letters and Reviews differentiates itself with 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., whereas WhaleWisdom stands out for Rank hedge fund managers by performance, risk-adjusted returns, and recent filings., Pull 13F, 13D/G, insider trades, and sector exposures into custom portfolios and alerts., and API and bulk downloads available for quantitative workflows and screening..

Keep exploring

Keep exploring

Stay on top of related tools

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

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.