Tool Comparison
Letters and Reviews vs WhaleWisdom
- Paid from
- —
- Free plan
- Yes
- Platforms
- Web
Best if
- You want blogs.
- Paid from
- $25/mo
- Free plan
- Yes
- Platforms
- Web, API, Desktop
Best if
- You want an API so you can script or automate things
- You want insider data, screeners, and backtesting.
Pick Letters and Reviews instead if
Letters and Reviews
Free · Web
- You want blogs.
Start here
WhaleWisdom
Free • From $300/yr · Web · API · Desktop
- You want an API so you can script or automate things
- You want insider data, screeners, and backtesting.
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOther tools you might like
Outbound links may include affiliate or sponsor codes.
Not set on either one? See the top 50 tools, ranked by user votes, or the deals page for big discounts on popular tools.
Our take
The bottom line
Letters and Reviews and WhaleWisdom cover a lot of the same ground (2 shared categories, stock ideas and institutional ownership), so for the basics you won't go far wrong with either. WhaleWisdom simply does more: 8 categories to Letters and Reviews's 3, including insider data, screeners, and backtesting. Letters and Reviews counters by being completely free.
What readers say
Letters and Reviews
No votes yet. Cast the first one.
WhaleWisdom
No votes yet. Cast the first one.
Key differences at a glance
- Global coverage
- Letters and Reviews
- Broader coverage
- WhaleWisdom8 vs 3 categories
- Desktop app
- WhaleWisdom
- API access
- WhaleWisdom
- Asset coverage
- WhaleWisdomAdds closed-end funds and bonds
- Free plan
- Both
What Letters and Reviews does best
- Browsing access to quarterly fund-manager-letter pages with fund names, dates, source links, and stocks mentioned in each letter.
- Ticker links as quick-reference starting points when a manager letter mentions a company worth researching further.
- Review quarterly 13F pages the curator follows, including holdings tables and activity flags for many managers where available.
- Discovery tools for stock-idea leads from manager commentary before moving to filings, transcripts, valuation work, and your own thesis checks.
- Use the free archive as a source map alongside paid manager-letter databases or 13F platforms.
What WhaleWisdom does best
- Tracks SEC filings including 13F reports, Schedule 13D/G events, Form 4 insider transactions, Form D, Form 144, N-CEN, and Form ADV.
- Monitors hedge funds, institutional filers, stock holders, filer groups, and stock watchlists.
- Review 13F history back to Q1 2001 on paid plans, while free access focuses on recent history and smaller limits.
- WhaleIndex, WhaleScore, WhaleTrader, Combined Holdings, and insider backtesting features on eligible paid plans.
- Export support for holdings and dashboard data through CSV, Excel, JSON, and the WhaleWisdom Excel Add-in depending on plan.
Side by side
Pricing comparison
See for yourself
Side by side
Price, platforms, data, and market coverage.ShowHide
Side by side
| Attribute | | |
|---|---|---|
| Pricing & plans | ||
Starting price | Free | Free • From $300/yr |
Free tier | Yes | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Desktop app | No | Yes |
Mobile app | No | No |
API access | No | Yes |
Integrations | — | WhaleWisdom Excel Add-in, Microsoft Office Store add-in +1 more |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 3 | 8 |
Regions | North America, Europe, APAC | North America |
| Data & capabilities | ||
Security | — | Data residency: US |
| Try it | Visit Letters and Reviews | Visit WhaleWisdom |
Standout features
The best features of Letters and Reviews and WhaleWisdom.ShowHide
Standout features
What Letters and Reviews does best
- Browsing access to quarterly fund-manager-letter pages with fund names, dates, source links, and stocks mentioned in each letter.
- Ticker links as quick-reference starting points when a manager letter mentions a company worth researching further.
- Review quarterly 13F pages the curator follows, including holdings tables and activity flags for many managers where available.
- Discovery tools for stock-idea leads from manager commentary before moving to filings, transcripts, valuation work, and your own thesis checks.
- Use the free archive as a source map alongside paid manager-letter databases or 13F platforms.
What WhaleWisdom does best
- Tracks SEC filings including 13F reports, Schedule 13D/G events, Form 4 insider transactions, Form D, Form 144, N-CEN, and Form ADV.
- Monitors hedge funds, institutional filers, stock holders, filer groups, and stock watchlists.
- Review 13F history back to Q1 2001 on paid plans, while free access focuses on recent history and smaller limits.
- WhaleIndex, WhaleScore, WhaleTrader, Combined Holdings, and insider backtesting features on eligible paid plans.
- Export support for holdings and dashboard data through CSV, Excel, JSON, and the WhaleWisdom Excel Add-in depending on plan.
All details
Every attribute we track for Letters and Reviews and WhaleWisdom.ShowHide
All details
| Attribute | | |
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksETFsClosed-End FundsBondsOptions |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEuropeAPAC | North America |
Coverage details | Identifiers: Ticker | Countries: USIdentifiers: Ticker, CUSIP, and CIK |
| Access & integrations | ||
API protocols | Not specified | REST |
API auth & delivery | Not specified | Auth: APIKey20 req/minDocs |
Integrations | Not specified | WhaleWisdom Excel Add-inMicrosoft Office Store add-inNightly FTP bulk files for Enterprise |
Export formats | Not specified | CSVExcelJSON |
| Plans & trust | ||
Security & compliance | Not specified | Data residency: US |
Vendor & support | Letters and Reviews (Blogger)Support: Email | WhaleWisdom, LLCCountry: United StatesSupport: Email |
Curation ratings | Methodology 3/5Reliability 3/5UX 3/5 | Methodology 3/5Reliability 3/5UX 3/5 |
Green tags are exclusive to that tool in this comparison.
Pricing
Plans, billing, free trials, and monthly prices.ShowHide
Pricing
| Tier | | |
|---|---|---|
| Free plan | Free | Free |
| Entry paid plan | — | $300/yr≈ $25/mo“Standard Annual” |
| Tier 2 | — | $90/qtr“Standard Quarterly” |
| Tier 3 | — | $500/yr≈ $41.67/mo“Pro Annual” |
| Top plan | — | $150/qtr“Pro Quarterly” |
| Custom / enterprise | — | Contact sales“Enterprise” |
Questions we keep getting
What's the difference between Letters and Reviews and WhaleWisdom?
Letters and Reviews leans toward stock ideas, institutional ownership, and blogs, while WhaleWisdom puts more weight on institutional ownership, insider data, and stock ideas. They overlap in 2 categories, so for most people it comes down to workflow preference and price.
How much do Letters and Reviews and WhaleWisdom cost?
Good news: both Letters and Reviews and WhaleWisdom have free plans, so you can run them side by side and only pay if you hit a wall.
Does Letters and Reviews or WhaleWisdom have an API?
WhaleWisdom has an API for programmatic access and custom integrations. Letters and Reviews doesn't, so you're working through its interface.
Should I choose Letters and Reviews or WhaleWisdom?
It depends on what you're after. Pick Letters and Reviews if blogs matter to you; go with WhaleWisdom if you'd rather have insider data and screeners. And if you only need the basics both share, let price decide.
What asset classes do Letters and Reviews and WhaleWisdom cover?
Both cover stocks and ETFs. WhaleWisdom adds closed-end funds, bonds, and options on top.
Which covers international markets: Letters and Reviews or WhaleWisdom?
Letters and Reviews has documented international coverage (North America, Europe, and APAC), so it's the safer bet if you hold non-US stocks. WhaleWisdom is more region-specific, mainly North America.
Can I export data from Letters and Reviews and WhaleWisdom?
WhaleWisdom exports to CSV and Excel. Letters and Reviews is stingier about getting data out.
Which has a better stock screener: Letters and Reviews or WhaleWisdom?
WhaleWisdom has a stock screener for surfacing ideas; Letters and Reviews doesn't, and focuses its energy elsewhere.
Keep researching
More comparisons to check
Other tools you might like
Keep Exploring
Feedback
Spot stale pricing, missing features, or a comparison that feels off? Send feedback on the verdict, table, alternatives, or recommendation.
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.