VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 19, 2025

View OpenInsider View Portfolio123 Home My Collections

Head-to-head

OpenInsider vs Portfolio123 comparison

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

Quick takeaways

OpenInsider adds Insider Data, and Regulatory Filings Monitoring coverage that Portfolio123 skips.

Portfolio123 includes Quant, Backtesting, Portfolio, Correlation, Calendar, APIs & SDKs, Data APIs, and Broker Connectors categories that OpenInsider omits.

OpenInsider highlights: Real-time screener of SEC Form 4 insider trading disclosures for U.S. stocks., Prebuilt screeners for quick discovery: Latest Purchases/Sales, $25k+ CEO or CFO buys, Cluster Buys, and weekly/monthly Top Purchases and Sales., and Aggregate Buy–Sell charts to visualize overall insider sentiment..

Portfolio123 is known for: Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging..

OpenInsider

openinsider.com

Editor’s pick Hands-on review

Free web-based screener for U.S. SEC Form 4 filings, tracking insider buys and sells in real time. Data is sourced directly from SEC.gov and refreshed between 6:00 and 22:00 ET on U.S. business days.

Platforms

Web

Pricing

Free

Quick highlights

Real-time screener of SEC Form 4 insider trading disclosures for U.S. stocks.
Prebuilt screeners for quick discovery: Latest Purchases/Sales, $25k+ CEO or CFO buys, Cluster Buys, and weekly/monthly Top Purchases and Sales.
Aggregate Buy–Sell charts to visualize overall insider sentiment.
Detailed filing tables with trade/filing dates, transaction codes, prices, quantities, and values, with an integrated code legend.
Ability to drill down by sector, industry, ticker, or individual insider profile.

Community votes (overall)

0% upvotes 0% downvotes

You haven't voted yet

View full profile Visit site

Portfolio123

portfolio123.com

Editor’s pick Hands-on review

Quant research and live-deployment platform with point-in-time fundamentals and estimates. Users can screen, backtest, and simulate strategies, then deploy them live with broker integrations. Supports API access and a no-code desktop DataMiner. FactSet or S&P Compustat licenses are required for full historical fundamentals.

Platforms

Web

Desktop

API

Pricing

Free

Subscription

Quick highlights

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.
Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead).

Community votes (overall)

0% upvotes 0% downvotes

You haven't voted yet

View full profile Visit site

Overlap

Shared focus areas

2 overlaps

Mutual strengths include Screeners, and Data Visualizations.

Where they differ

OpenInsider

Distinct strengths include:

Insider Data

Regulatory Filings Monitoring

Real-time screener of SEC Form 4 insider trading disclosures for U.S. stocks.
Prebuilt screeners for quick discovery: Latest Purchases/Sales, $25k+ CEO or CFO buys, Cluster Buys, and weekly/monthly Top Purchases and Sales.
Aggregate Buy–Sell charts to visualize overall insider sentiment.
Detailed filing tables with trade/filing dates, transaction codes, prices, quantities, and values, with an integrated code legend.

Portfolio123

Distinct strengths include:

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.

Feature-by-feature breakdown

Attribute	OpenInsider	Portfolio123
Categories Which research workflows each platform targets	Shared: Screeners, Data Visualizations Unique: Insider Data, Regulatory Filings Monitoring	Shared: Screeners, Data Visualizations Unique: Quant, Backtesting, Portfolio, Correlation, Calendar, APIs & SDKs, Data APIs, Broker Connectors
Asset types Supported asset classes and universes	Stocks	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, Desktop, API
Pricing High-level pricing models	Free	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Real-time screener of SEC Form 4 insider trading disclosures for U.S. stocks. Prebuilt screeners for quick discovery: Latest Purchases/Sales, $25k+ CEO or CFO buys, Cluster Buys, and weekly/monthly Top Purchases and Sales. Aggregate Buy–Sell charts to visualize overall insider sentiment. Detailed filing tables with trade/filing dates, transaction codes, prices, quantities, and values, with an integrated code legend. Ability to drill down by sector, industry, ticker, or individual insider profile. CSV export links on lists and insider profile pages for offline use.	Unique Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry. Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data. Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging. ‘Books’ feature to combine multiple strategies and view correlations between them. Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead). Coverage of 15,000+ equities in the U.S., Canada, and Europe, including delisted stocks and spinoffs.
Tested Verified by hands-on testing inside Find My Moat	Yes	Yes
Editor pick Featured inside curated shortlists	Highlighted	Highlighted

Frequently Asked Questions

Which workflows do OpenInsider and Portfolio123 both support?

Both platforms cover Screeners, and Data Visualizations workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do OpenInsider and Portfolio123 require subscriptions?

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

How can you access OpenInsider and Portfolio123?

Both OpenInsider and Portfolio123 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?

OpenInsider differentiates itself with Real-time screener of SEC Form 4 insider trading disclosures for U.S. stocks., Prebuilt screeners for quick discovery: Latest Purchases/Sales, $25k+ CEO or CFO buys, Cluster Buys, and weekly/monthly Top Purchases and Sales., and Aggregate Buy–Sell charts to visualize overall insider sentiment., whereas Portfolio123 stands out for Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging..

Keep exploring

Stay on top of related tools

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