VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View Diffchecker View Portfolio123 Back to Home

Head-to-head

Diffchecker vs Portfolio123 comparison

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

Quick takeaways

Diffchecker adds Diff View coverage that Portfolio123 skips.

Portfolio123 includes Screeners, Quant, Backtesting, Portfolio, Correlation, Calendar, Data APIs, Broker Connectors, and Data Visualizations categories that Diffchecker omits.

Diffchecker highlights: Supports multi-format comparisons: text, images, PDFs, Excel files, and folders., Desktop apps allow fully offline diffs, ensuring comparisons never leave the user’s computer., and Real-time text diffing, diff merging, dark mode, and export to PDF..

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..

Diffchecker

diffchecker.com

Diffchecker is a comparison tool for text, images, PDFs, Excel files, and folders. The free Basic plan is web-only, while Pro + Desktop adds offline diffs, ad-free usage, real-time text comparison, and desktop apps. Legal and Enterprise tiers include integrations (e.g. iManage) and advanced admin features. Enterprise also offers SAML SSO, SCIM provisioning, and priority support. An API is available with free and paid plans, and a 14-day trial is offered for Pro/Desktop plans.

Platforms

Web

Desktop

API

Pricing

Free

Subscription

Quick highlights

Supports multi-format comparisons: text, images, PDFs, Excel files, and folders.
Desktop apps allow fully offline diffs, ensuring comparisons never leave the user’s computer.
Real-time text diffing, diff merging, dark mode, and export to PDF.
Syntax highlighting for 20+ programming languages with character-by-character precision.
Public HTTP API supports text, image, PDF, and Excel diffs with tiered monthly quotas and input size limits.

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

1 overlap

Both tools cover this research theme.

APIs & SDKs

Where they differ

Diffchecker

Distinct strengths include:

Diff View

Supports multi-format comparisons: text, images, PDFs, Excel files, and folders.
Desktop apps allow fully offline diffs, ensuring comparisons never leave the user’s computer.
Real-time text diffing, diff merging, dark mode, and export to PDF.
Syntax highlighting for 20+ programming languages with character-by-character precision.

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	Diffchecker	Portfolio123
Categories Which research workflows each platform targets	Shared: APIs & SDKs Unique: Diff View	Shared: APIs & SDKs Unique: Screeners, Quant, Backtesting, Portfolio, Correlation, Calendar, Data APIs, Broker Connectors, Data Visualizations
Asset types Supported asset classes and universes	Other	Stocks, ETFs
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web, Desktop, API	Web, Desktop, API
Pricing High-level pricing models	Free, Subscription	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Supports multi-format comparisons: text, images, PDFs, Excel files, and folders. Desktop apps allow fully offline diffs, ensuring comparisons never leave the user’s computer. Real-time text diffing, diff merging, dark mode, and export to PDF. Syntax highlighting for 20+ programming languages with character-by-character precision. Public HTTP API supports text, image, PDF, and Excel diffs with tiered monthly quotas and input size limits. API authentication uses an email query for the free tier, and API keys for paid plans.	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	Not yet	Yes
Editor pick Featured inside curated shortlists	Standard listing	Highlighted

Frequently Asked Questions

Which workflows do Diffchecker and Portfolio123 both support?

Both platforms cover APIs & SDKs workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do Diffchecker and Portfolio123 require subscriptions?

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

How can you access Diffchecker and Portfolio123?

Both Diffchecker 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?

Diffchecker differentiates itself with Supports multi-format comparisons: text, images, PDFs, Excel files, and folders., Desktop apps allow fully offline diffs, ensuring comparisons never leave the user’s computer., and Real-time text diffing, diff merging, dark mode, and export to PDF., 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.