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Head-to-head · Quant Tools

Portfolio123 vs Portfolio Visualizer

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Portfolio123 #6 in Quant Tools 8.5/10 Free plan · 30-day trial Free planFree trial✓ 3 of 4 features Visit Portfolio123
Portfolio Visualizer #8 in Quant Tools 8.3/10 Free plan · 14-day trial Free planFree trial✓ 0 of 4 features Visit site

Portfolio123 leads on 0 checks, Portfolio Visualizer on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePortfolio123 · 8.5/10
  • Free planboth
  • Free trialboth
  • Most featuresPortfolio123 · 3 of 4

Portfolio123 scores higher on our rubric for quant tools: 8.5 against 8.3 out of 10; our editors rank them #6 and #8.

Portfolio123 is the better fit for investors building factor-based stock systems. Portfolio Visualizer is the better fit for portfolio analytics and allocation research.

  • Portfolio123 fits best

    Investors building factor-based stock systems

  • Portfolio Visualizer fits best

    Portfolio analytics and allocation research

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Portfolio123 8.5/10 Visit ↗ Portfolio Visualizer 8.3/10 Visit ↗
At a glance
Editor score 8.5 8.3
Ranking #6 in Quant Tools #8 in Quant Tools
Best for Investors building factor-based stock systems Portfolio analytics and allocation research
Pricing model Free plan + paid Free plan + paid
Starting price Free plan · 30-day trial $30/mo
Free plan ✓ ✓
Free trial 30 days 14 days
Free trial length 30 days · no card needed 14 days
Deployment Cloud Cloud
Platforms Web Web
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features Portfolio123 3/4 · Portfolio Visualizer 0/4
Strategy backtesting ✓ (best) Not checked yet
Live trade execution ✓ (best) Not checked yet
Paper trading Not checked yet Not checked yet
Historical data access ✓ (best) Not checked yet
Specs
Asset classes Stocks Not checked yet
Strategy languages Not checked yet Not checked yet
Our review
Pros
  • Build multi-factor rankings, stock screens, and buy/sell rules
  • Backtest screens and portfolio strategies with historical data
  • Track strategies and send orders through Interactive Brokers
  • Backtests portfolios across stocks, ETFs, mutual funds, and asset classes
  • Combines Monte Carlo, risk, drawdown, and rolling-return analysis
  • Free plan includes optimization, factor regression, and file exports
Cons
  • Focused on stocks rather than multiple asset classes
  • Broker connection and order routing are centered on Interactive Brokers
  • Support is listed through documentation
  • Advanced research can require interpreting several analytical methods
  • Paid plans are priced monthly but billed annually
  • Results are educational and illustrative, not a forecast of future performance
Our verdict

Portfolio123 is a web-based investment research platform for investors who want to build, test, and manage rules-based stock strategies. It combines ranking systems, buy and sell rules, multi-factor screening, historical simulations, and…

Read the review →

Portfolio Visualizer is a web-based suite of investment analysis tools for individual investors, educators, portfolio managers, and financial analysts. It supports portfolio backtesting across stocks, ETFs, mutual funds, asset classes, and…

Read the review →
  1. Portfolio123Quant Tools 8.5Free plan · 30-day trial
  2. Portfolio VisualizerQuant Tools 8.3Free plan · 14-day trial

Strengths and trade-offs

  • Portfolio123 — where it wins

    • Build multi-factor rankings, stock screens, and buy/sell rules
    • Backtest screens and portfolio strategies with historical data
    • Track strategies and send orders through Interactive Brokers

    Where it doesn't

    • Focused on stocks rather than multiple asset classes
    • Broker connection and order routing are centered on Interactive Brokers
    • Support is listed through documentation

  • Portfolio Visualizer — where it wins

    • Backtests portfolios across stocks, ETFs, mutual funds, and asset classes
    • Combines Monte Carlo, risk, drawdown, and rolling-return analysis
    • Free plan includes optimization, factor regression, and file exports

    Where it doesn't

    • Advanced research can require interpreting several analytical methods
    • Paid plans are priced monthly but billed annually
    • Results are educational and illustrative, not a forecast of future performance
  • Portfolio1238.5/10 · Free plan · 30-day trial

    A web-based toolkit for ranking, screening, backtesting, and trading stock strategies.

    Visit Portfolio123Full verdict →
  • Portfolio Visualizer8.3/10 · Free plan · 14-day trial

    A web-based toolkit for portfolio backtesting, risk analysis, and allocation research.

    Visit siteFull verdict →

More comparisons

All quant tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update