VOL. XCIV, NO. 247
★ BEST INVESTING TOOLS COMPARISON ★
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Friday, January 30, 2026
Tool Comparison
Letters and Reviews vs Portfolio123 comparison
Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.
Portfolio123
portfolio123.com
At a glance
| Letters and Reviews | Portfolio123 | |
|---|---|---|
| Free tier | ||
| Free trial | ||
| Starting price | — | $25/mo |
| Enterprise option | ||
| Available plans | Free | Manage (Free), Retail Research Plans, Professional / API & Data Licenses, Research Trial |
Vote sentiment comparison
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Platform details
| Attribute | Letters and Reviews | Portfolio123 |
|---|---|---|
Asset types | StocksETFs | StocksETFsClosed-End Funds |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North AmericaEuropeAPAC | North AmericaEurope |
Data freshness | Not specified | Real-timeEnd of Day |
API access | Not specified | REST |
Export formats | Not specified | JSON |
Coverage overlap
Categories covered by Portfolio123 only.
Frequently Asked Questions
What's the difference between Letters and Reviews and Portfolio123?
Letters and Reviews focuses on Stock Ideas, 13F, and Blogs while Portfolio123 specializes in Screeners, Data Visualizations, and Quant. They overlap in 2 categories, so choose based on your preferred workflow and pricing.
How much do Letters and Reviews and Portfolio123 cost?
Good news—both Letters and Reviews and Portfolio123 offer free plans. You can try each platform without commitment and only pay when you need premium features.
Does Letters and Reviews or Portfolio123 have an API?
Portfolio123 provides API access for programmatic data retrieval and custom integrations. Letters and Reviews doesn't currently offer an API, so you'll need to use their web interface.
Should I choose Letters and Reviews or Portfolio123?
Choose Letters and Reviews if you need Quarterly **Fund Manager Letters** pages with the fund name, date, and a "Stocks Mentioned" column (tickers link out for quick lookup)., and Quarterly **13-F pages** the author reads, with many entries including holdings tables and position-change flags (e.g., NEW / Sold Out / % of portfolio).. Go with Portfolio123 if Web‑based quant research terminal for building multifactor ranking systems, stock/ETF screens, and complete rules‑based strategies with no programming, powered by point‑in‑time FactSet data and marketed as free of survivorship and look‑ahead bias., and Supports realistic simulations and backtests over roughly 20 years of history for US, Canadian, and European equities, with custom universes, separate buy/sell rules, position sizing, hedging, and “Book of Strategies” to combine and analyze correlated systems. better fits how you invest.
What asset classes do Letters and Reviews and Portfolio123 cover?
Both cover Stocks, and ETFs. Portfolio123 adds coverage for Closed-End Funds.
Does Letters and Reviews or Portfolio123 have real-time data?
Portfolio123 offers real-time data feeds, which is essential for active traders. Letters and Reviews uses delayed or end-of-day data, which works fine for longer-term investors who don't need up-to-the-second quotes.
Can Letters and Reviews or Portfolio123 connect to my broker?
Portfolio123 connects with brokers for portfolio syncing. Letters and Reviews requires manual portfolio entry or data import.
Which has a better stock screener—Letters and Reviews or Portfolio123?
Portfolio123 includes a stock screener for finding investment ideas. Letters and Reviews focuses on other analytical tools.
Can I track my portfolio with Letters and Reviews or Portfolio123?
Portfolio123 offers portfolio tracking features. Letters and Reviews is more focused on research and analysis.
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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.