VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 19, 2025

View AhrefsView Portfolio123 Home My Collections

Head-to-head

Ahrefs vs Portfolio123 comparison

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

Quick takeaways

Ahrefs adds App & Website Traffic coverage that Portfolio123 skips.

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

Ahrefs highlights: Comprehensive toolkit: Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, Content Explorer, and Web Analytics., Ahrefs Webmaster Tools (free) provides a lighter version of Site Explorer and Site Audit, plus Web Analytics for verified sites., and Looker Studio connectors available for Site Explorer, Rank Tracker, and Site Audit — reserved for Advanced and above..

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..

Ahrefs logo

Ahrefs

ahrefs.com

Hands-on review

A leading SEO and web-traffic intelligence suite. The free Ahrefs Webmaster Tools unlocks limited access to Site Explorer, Site Audit, and Web Analytics for verified sites, while full platform plans expand into deep backlink, keyword, and content analysis. Higher-tier subscriptions govern credits, export limits, historical data windows, and API access.

Platforms

Web
API

Pricing

Free
Subscription

Quick highlights

  • Comprehensive toolkit: Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, Content Explorer, and Web Analytics.
  • Ahrefs Webmaster Tools (free) provides a lighter version of Site Explorer and Site Audit, plus Web Analytics for verified sites.
  • Looker Studio connectors available for Site Explorer, Rank Tracker, and Site Audit — reserved for Advanced and above.
  • Automated email alerts for new or lost backlinks, keyword changes, and web mentions, with flexible delivery options.
  • API v3 is included with Enterprise plans (with limited test queries available to all users).

Community votes (overall)

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Portfolio123 logo

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)

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Overlap

Shared focus areas

1 overlap

Both tools cover this research theme.

Where they differ

Ahrefs

Distinct strengths include:

App & Website Traffic
  • Comprehensive toolkit: Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, Content Explorer, and Web Analytics.
  • Ahrefs Webmaster Tools (free) provides a lighter version of Site Explorer and Site Audit, plus Web Analytics for verified sites.
  • Looker Studio connectors available for Site Explorer, Rank Tracker, and Site Audit — reserved for Advanced and above.
  • Automated email alerts for new or lost backlinks, keyword changes, and web mentions, with flexible delivery options.

Portfolio123

Distinct strengths include:

Screeners
Quant
Backtesting
Portfolio
Correlation
Calendar
Data APIs
Broker Connectors
  • 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

AttributeAhrefsPortfolio123
Categories

Which research workflows each platform targets

Shared: APIs & SDKs

Unique: App & Website Traffic

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, API

Web, Desktop, API

Pricing

High-level pricing models

Free, Subscription

Free, Subscription

Key features

Core capabilities called out by each vendor

Unique

  • Comprehensive toolkit: Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, Content Explorer, and Web Analytics.
  • Ahrefs Webmaster Tools (free) provides a lighter version of Site Explorer and Site Audit, plus Web Analytics for verified sites.
  • Looker Studio connectors available for Site Explorer, Rank Tracker, and Site Audit — reserved for Advanced and above.
  • Automated email alerts for new or lost backlinks, keyword changes, and web mentions, with flexible delivery options.
  • API v3 is included with Enterprise plans (with limited test queries available to all users).
  • Enterprise also adds SSO, two-factor authentication, and higher data allowances.

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

Standard listing

Highlighted

Frequently Asked Questions

Which workflows do Ahrefs 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 Ahrefs and Portfolio123 require subscriptions?

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

How can you access Ahrefs and Portfolio123?

Both Ahrefs 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?

Ahrefs differentiates itself with Comprehensive toolkit: Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, Content Explorer, and Web Analytics., Ahrefs Webmaster Tools (free) provides a lighter version of Site Explorer and Site Audit, plus Web Analytics for verified sites., and Looker Studio connectors available for Site Explorer, Rank Tracker, and Site Audit — reserved for Advanced and above., 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.

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.