★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool comparison edition
Tool Comparison
FactorsToday vs Testfol.io
Start here
FactorsToday
Other · Web · API
- Delayed quotes won't cut it; you need real-time data
- You want an API so you can script or automate things
- You care about screeners, data visualizations, and stock comparison, things Testfol.io doesn't offer
Pick Testfol.io instead if
Testfol.io
Free · Web
- You'd rather start free and only pay if you outgrow it
- You care about compounding calculator, something FactorsToday doesn't offer
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
FactorsToday and Testfol.io cover a lot of the same ground (4 shared categories, including quant, risk metrics, and backtesting), so for the basics you won't go far wrong with either. FactorsToday simply does more: 13 categories to Testfol.io's 5, including screeners, data visualizations, and stock comparison. Testfol.io counters by being completely free.
What readers say
FactorsToday
Vote once to reveal the community verdict.
Testfol.io
Vote once to reveal the community verdict.
Key differences at a glance
- Free plan
- Testfol.io
- Broader coverage
- FactorsToday13 vs 5 categories
- API access
- FactorsToday
- Real-time data
- FactorsToday
- Asset coverage
- FactorsTodayAdds closed-end funds
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Other | Free |
Free tier | No | Yes |
Free trial | — | — |
Plan limits | — | Free (Anonymous): note: Some tools (e.g., Signal Analyzer) require sign-in. |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | Yes | No |
Broker sync | No | — |
| Audience & fit | ||
Experience level | Intermediate, Advanced | Intermediate, Advanced |
Best for | Analysts and Quants/Developers | Retail Traders, Pro Retail +2 more |
Categories covered | 13 | 5 |
Regions | — | — |
| Data & capabilities | ||
Data quality | 3 signals: Latency: Real-time and End of Day, Granularity: EOD and Second +1 more | Latency: End of Day and Granularity: EOD |
Data partners | — | FRED |
Capabilities | 9 signals: Universe builder, Factors: Value, Quality, Momentum, Growth, LowVol, and Size +7 more | Rebalancing and Correlation |
| Try it | Visit FactorsToday | Visit Testfol.io |
Where each one shines
What FactorsToday and Testfol.io each do best.ShowHide
Where each one shines
What FactorsToday and Testfol.io each do best.What FactorsToday does best
- Monitor extreme factor moves and factor pairs with live dashboards, z-scores, and multiple time windows.
- Screen factors by timeframe, return, direction, and name, or screen stocks by stock type, factor criteria, and model-fit metrics.
- Analyze individual tickers through stock lookup, factor exposures, model comparisons, and related-stock similarity.
- Upload portfolio holdings by CSV, choose factor-model granularity, compare against a benchmark, and run what-if factor scenarios.
- Use Hedge Portfolio Builder to recommend hedge positions against factor targets with constraint controls and CSV export.
What Testfol.io does best
- Build multi-asset portfolio backtests using ETFs, mutual funds, stocks, cashflow legs, and rebalancing controls such as rebalance bands.
- Review performance and risk statistics such as cumulative return, CAGR, money-weighted return, max drawdown, volatility, Sharpe, Sortino, and beta.
- Use Asset Analyzer for historical performance analysis and daily-return correlations.
- Test tactical allocation rules that swap between allocations using documented indicators, trading frequency, offsets, cashflows, benchmarks, and current-status views.
- Use Portfolio Optimizer to search for asset allocation and leverage choices based on user-provided inputs.
Every detail we compared
Every tracked attribute for FactorsToday and Testfol.io, side by side.ShowHide
Every detail we compared
Every tracked attribute for FactorsToday and Testfol.io, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFsMutual FundsClosed-End Funds | StocksETFsMutual Funds |
Experience | IntermediateAdvanced | IntermediateAdvanced |
Target audience | AnalystsQuants/Developers | Retail TradersPro RetailLong-term InvestorsQuants/Developers |
Coverage details | Identifiers: Ticker | Identifiers: Ticker |
| Data | ||
Data freshness | Real-timeEnd of Day | End of Day |
Data granularity | EODSecond | EOD |
Data partners | Not specified | FRED |
| Access & integrations | ||
API protocols | REST | Not specified |
API auth & delivery | Auth: None600 req/minDocs | Not specified |
Import methods | CSVManual | Not specified |
Export formats | CSVExcelJSON | CSV |
| Plans & trust | ||
Capability signals | Universe builderFactors: Value, Quality, Momentum, Growth, LowVol, and SizeFactor exposureVaR/ESStress tests: Rates, FX, and CommoditiesPerformance attributionPortfolio attributionPortfolio factor exposure+1 more | RebalancingCorrelation |
Vendor & support | FactorsToday (operated by Lukasz R. Tomicki)Country: USSupport: Email | Support: Email |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | — | Free“Free (Anonymous)”note: Some tools (e.g., Signal Analyzer) require sign-in. |
Questions we keep getting
What's the difference between FactorsToday and Testfol.io?
FactorsToday leans toward screeners, quant, and data visualizations, while Testfol.io puts more weight on backtesting, correlation, and risk metrics. They overlap in 4 categories, so for most people it comes down to workflow preference and price.
Is FactorsToday or Testfol.io free to use?
Testfol.io has a free tier, so you can get started without paying anything. FactorsToday is paid-only. If budget matters, start with Testfol.io and see how far it takes you before opening your wallet.
Does FactorsToday or Testfol.io have an API?
FactorsToday has an API for programmatic access and custom integrations. Testfol.io doesn't, so you're working through its interface.
Should I choose FactorsToday or Testfol.io?
It depends on what you're after. Pick FactorsToday if screeners and data visualizations matter to you; go with Testfol.io if you'd rather have compounding calculator. And if you only need the basics both share, let price decide.
What asset classes do FactorsToday and Testfol.io cover?
Both cover stocks, ETFs, and mutual funds. FactorsToday also handles closed-end funds.
Does FactorsToday or Testfol.io have real-time data?
FactorsToday offers real-time data, which matters if you trade actively. Testfol.io runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Can I export data from FactorsToday and Testfol.io?
Yes, both export to spreadsheets (CSV), which is handy if you like running your own numbers.
Which has a better stock screener: FactorsToday or Testfol.io?
FactorsToday has a stock screener for surfacing ideas; Testfol.io doesn't, and focuses its energy elsewhere.
Can I track my portfolio with FactorsToday or Testfol.io?
FactorsToday handles portfolio tracking. Testfol.io is really a research tool; you'd track your portfolio elsewhere.
Keep researching
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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.