★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool details checked August 23, 2026
Tool Comparison
FactorsToday vs Testfol.io
Start here
FactorsToday
Free · 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 • From $15/mo · Web
- You care about compounding calculator, something FactorsToday doesn't offer
- You're a long-term investor who cares more about fundamentals than headlines
Skip both if: Neither one clicks with how you research; there are strong third options.
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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 keeping things simpler.
What readers say
FactorsToday
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Testfol.io
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Key differences at a glance
- Real-time data
- FactorsToday
- Free trial
- Testfol.io1 days
- Broader coverage
- FactorsToday13 vs 5 categories
- API access
- FactorsToday
- Asset coverage
- FactorsTodayAdds closed-end funds
- Free plan
- Both
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 | Free | Free • From $15/mo |
Free tier | Yes | Yes |
Free trial | — | 1 days |
Plan limits | — | 5 limits: Free (Anonymous): note: Some tools (e.g., Signal Analyzer) require sign-in., Pro: annual price usd: 150 +3 more |
| 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 Minute +1 more | Latency: End of Day and Granularity: EOD |
Data partners | — | FRED |
Capabilities | 7 signals: Universe builder, Factors: Value, Quality, Momentum, Growth, LowVol, and Size +5 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
- Factor dashboards report intraday and multi-period returns, z-scores, pair relationships, correlations, seasonality, and valuations.
- Stock pages use ElasticNet regression with cross-validation to estimate exposures across four nested models.
- Portfolio analysis accepts holdings, compares exposures with a benchmark, and applies user-defined factor-return scenarios.
- Performance attribution applies rolling ordinary-least-squares regressions to uploaded or pasted returns and exports results to Excel.
- The factor builder searches for stocks matching target exposures and displays simulated historical results.
What Testfol.io does best
- Tools for building 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.
- Asset Analyzer for historical performance analysis and daily-return correlations.
- Testing tools for tactical allocation rules that swap between allocations using documented indicators, trading frequency, offsets, cashflows, benchmarks, and current-status views.
- Portfolio Optimizer searches for asset allocation and use 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 | EODMinute | 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 exposurePerformance attributionPortfolio attributionPortfolio factor exposureCorrelation | 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. |
| Entry paid plan | — | $15/mo“Pro”annual price usd: 150 · annual monthly equivalent usd: 12.5 |
| Top plan | — | $30/mo“Pro+”annual price usd: 300 · annual monthly equivalent usd: 25 |
| Free trial | — | 1 days |
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.
How much do FactorsToday and Testfol.io cost?
Good news: both FactorsToday and Testfol.io have free plans, so you can run them side by side and only pay if you hit a wall.
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.