VOL. XCIV, NO. 247

★ A CURATED DIRECTORY OF FINANCIAL TOOLS ★

PRICE: 5 CENTS

Sunday, December 14, 2025

Tool Comparison

Portfolio123 vs Uncle Stock comparison

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

Quick takeaways

Portfolio123 adds Data Visualizations, Quant, Stock Ideas, Correlation, GDP, Interest Rates, Unemployment Rates, Consumer Sentiment, Housing & Construction, APIs & SDKs, Broker Connectors, Blogs, and Videos coverage that Uncle Stock skips.

Uncle Stock includes Valuation Models, Scores, and Checklist categories that Portfolio123 omits.

In depth comparison

Portfolio123

portfolio123.com

Editor’s pick Hands-on review

Rules‑based quant research and portfolio‑management platform. Free Manage module covers multi‑account tracking, watchlists, and broker connectivity, while paid Research/DataMiner/API tiers unlock multifactor ranking, screening, long history backtests, AI Factor, and programmatic access. API & DataMiner use an API‑credit system with monthly caps that depend on your membership; the 21‑day paid Research trial excludes API/DataMiner and runs on a limited history slice.

Platforms

WebAPIDesktop

Pricing

FreeSubscription

Quick highlights

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.
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.
Stock & ETF coverage uses fundamentals, estimates, corporate actions, plus industry/sector classification, with “over 15,000 current US, Canadian, and European stocks” and many more historical issues.
AI Factor lets users train machine‑learning factors and plug them into ranking systems and strategies alongside traditional factors, with supporting API endpoints.
Manage module (free) provides portfolio/account tracking with real‑time quotes, multi‑account strategy tracking, stock timelines, integrated research views, and re‑imagined watchlists that chart watchlist performance vs benchmarks.

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Uncle Stock

unclestock.com

Hands-on review

Global, fundamentals‑first stock screener with detailed metrics and built‑in backtesting. Covers 60k+ stocks across all continents with up to ~35 years of US history (20 years elsewhere). US fundamentals from Sharadar; non‑US fundamentals and price history from EOD Historical Data. Prices are delayed; Nasdaq shows prior‑day when market is open. API access (Gold) delivers CSV/JSON with explicit rate limits.

Platforms

WebAPI

Pricing

FreeSubscription

Quick highlights

Screening with ~4k searchable metrics, full‑text business/industry search, market/country/sector filters, and index‑constituent filters.
Backtesting with annual/half‑year/quarterly rebalance, look‑ahead avoidance (uses only data known at rebalance time), position sizing (equal/volatility/expectation‑weighted), early‑sell rules (profit targets, stop loss), and risk stats (Sharpe/Sortino).
Transparent composite scores (e.g., Uncle Stock score, Quality/Value/Financial‑Health) plus Piotroski, ERP5, Benish M, Montier and more-formulas publicly documented.
Benchmarking vs S&P 500/other indices; industry medians and long‑history fundamentals.
Lightweight portfolio: positions, limits & email notifications (Gold).

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Where they differ

Portfolio123

Distinct strengths include:

Data Visualizations Quant Stock Ideas Correlation GDP Interest Rates Unemployment Rates Consumer Sentiment

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.
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.
Stock & ETF coverage uses fundamentals, estimates, corporate actions, plus industry/sector classification, with “over 15,000 current US, Canadian, and European stocks” and many more historical issues.
AI Factor lets users train machine‑learning factors and plug them into ranking systems and strategies alongside traditional factors, with supporting API endpoints.

Uncle Stock

Distinct strengths include:

Valuation Models Scores Checklist

Screening with ~4k searchable metrics, full‑text business/industry search, market/country/sector filters, and index‑constituent filters.
Backtesting with annual/half‑year/quarterly rebalance, look‑ahead avoidance (uses only data known at rebalance time), position sizing (equal/volatility/expectation‑weighted), early‑sell rules (profit targets, stop loss), and risk stats (Sharpe/Sortino).
Transparent composite scores (e.g., Uncle Stock score, Quality/Value/Financial‑Health) plus Piotroski, ERP5, Benish M, Montier and more-formulas publicly documented.
Benchmarking vs S&P 500/other indices; industry medians and long‑history fundamentals.

Feature-by-feature breakdown

Attribute	Portfolio123	Uncle Stock
Categories Which research workflows each platform targets	Shared: Screeners, Portfolio, Watchlist, Backtesting, Financials, Data APIs, Education Unique: Data Visualizations, Quant, Stock Ideas, Correlation, GDP, Interest Rates, Unemployment Rates, Consumer Sentiment, Housing & Construction, APIs & SDKs, Broker Connectors, Blogs, Videos	Shared: Screeners, Portfolio, Watchlist, Backtesting, Financials, Data APIs, Education Unique: Valuation Models, Scores, Checklist
Asset types Supported asset classes and universes	Stocks, ETFs, Closed-End Funds	Stocks, Cryptos
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Intermediate, Advanced
Platforms Where you can access the product	Web, API, Desktop	Web, API
Pricing High-level pricing models	Free, Subscription	Free, Subscription
Key features Core capabilities called out by each vendor	Unique 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. 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. Stock & ETF coverage uses fundamentals, estimates, corporate actions, plus industry/sector classification, with “over 15,000 current US, Canadian, and European stocks” and many more historical issues. AI Factor lets users train machine‑learning factors and plug them into ranking systems and strategies alongside traditional factors, with supporting API endpoints. Manage module (free) provides portfolio/account tracking with real‑time quotes, multi‑account strategy tracking, stock timelines, integrated research views, and re‑imagined watchlists that chart watchlist performance vs benchmarks. Broker connectivity enables sending orders from Portfolio123 to linked brokerage accounts (e.g., Interactive Brokers, Tradier), syncing holdings and fills automatically while keeping assets at your existing broker.	Unique Screening with ~4k searchable metrics, full‑text business/industry search, market/country/sector filters, and index‑constituent filters. Backtesting with annual/half‑year/quarterly rebalance, look‑ahead avoidance (uses only data known at rebalance time), position sizing (equal/volatility/expectation‑weighted), early‑sell rules (profit targets, stop loss), and risk stats (Sharpe/Sortino). Transparent composite scores (e.g., Uncle Stock score, Quality/Value/Financial‑Health) plus Piotroski, ERP5, Benish M, Montier and more-formulas publicly documented. Benchmarking vs S&P 500/other indices; industry medians and long‑history fundamentals. Lightweight portfolio: positions, limits & email notifications (Gold). API (Gold): CSV/JSON endpoints for symbols, universes, indicators, saved queries, stock history; monthly cap 300 calls and 1 request/minute.
Tested Verified by hands-on testing inside Find My Moat	Yes	Yes
Editor pick Featured inside curated shortlists	Highlighted	Standard listing

Frequently Asked Questions

Which workflows do Portfolio123 and Uncle Stock both support?

Both platforms cover Screeners, Portfolio, Watchlist, Backtesting, Financials, Data APIs, and Education workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do Portfolio123 and Uncle Stock require subscriptions?

Both Portfolio123 and Uncle Stock keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access Portfolio123 and Uncle Stock?

Both Portfolio123 and Uncle Stock 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?

Portfolio123 differentiates itself with 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., 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., and Stock & ETF coverage uses fundamentals, estimates, corporate actions, plus industry/sector classification, with “over 15,000 current US, Canadian, and European stocks” and many more historical issues., whereas Uncle Stock stands out for Screening with ~4k searchable metrics, full‑text business/industry search, market/country/sector filters, and index‑constituent filters., Backtesting with annual/half‑year/quarterly rebalance, look‑ahead avoidance (uses only data known at rebalance time), position sizing (equal/volatility/expectation‑weighted), early‑sell rules (profit targets, stop loss), and risk stats (Sharpe/Sortino)., and Transparent composite scores (e.g., Uncle Stock score, Quality/Value/Financial‑Health) plus Piotroski, ERP5, Benish M, Montier and more-formulas publicly documented..

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