VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Source checks: Curvo Backtest checked September 30, 2026 · Portfolio123 checked September 24, 2026
Tool Comparison
Curvo Backtest vs Portfolio123
- Paid from
- —
- Free plan
- Yes
- Platforms
- Web
Best if
- You want risk metrics and monte carlo.
- You're a long-term investor who cares more about fundamentals than headlines
- Paid from
- $25/mo
- Free plan
- Yes
- Platforms
- Web, API, Desktop
Best if
- Delayed quotes won't cut it; you need real-time data
- You want an API so you can script or automate things
- You want screeners, quant, and stock ideas.
Pick Curvo Backtest instead if
Curvo Backtest
Free · Web
- You want risk metrics and monte carlo.
- You're a long-term investor who cares more about fundamentals than headlines
Start here
Portfolio123
Free • From $300/yr · Web · API · Desktop
- Delayed quotes won't cut it; you need real-time data
- You want an API so you can script or automate things
- You want screeners, quant, and stock ideas.
Skip both if: Neither one clicks with how you research; there are strong third options.
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Our take
The bottom line
Curvo Backtest and Portfolio123 cover a lot of the same ground (4 shared categories, including backtesting, portfolio, and correlation), so for the basics you won't go far wrong with either. Portfolio123 simply does more: 19 categories to Curvo Backtest's 6, including screeners, quant, and stock ideas. Curvo Backtest counters by being completely free.
What readers say
Curvo Backtest
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Portfolio123
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Key differences at a glance
- Real-time data
- Portfolio123
- Broader coverage
- Portfolio12319 vs 6 categories
- Desktop app
- Portfolio123
- API access
- Portfolio123
- Free plan
- Both
What Curvo Backtest does best
- Set fund weights and compare allocations.
- Model returns using underlying index histories.
- Include each fund's TER in the simulation.
- Test allocation drift thresholds.
- Send a link to the portfolio setup.
What Portfolio123 does best
- Build multifactor ranking systems, stock screens, ETF screens, and rules-based strategies.
- Run simulations with custom universes, buy and sell rules, position sizing, hedging, rebalancing, slippage, and commissions.
- Point-in-time data designed to avoid survivorship and look-ahead bias, with fundamentals, estimates, corporate actions, sector and industry classifications, and historical issues.
- Create ranking systems from fundamental, technical, sentiment, and macro factors, including public factor documentation and FRED-linked economic series.
- AI Factor to train machine-learning predictors for expected returns and feed those predictions into rankings, simulations, and asset-level analysis.
Side by side
Pricing comparison
See for yourself
Side by side
Price, platforms, data, and market coverage.ShowHide
Side by side
| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free | Free • From $300/yr |
Free tier | Yes | Yes |
Free trial | — | — |
Plan limits | — | 25 limits: Free Screener & Backtesting Access: duration days: 30, Screener (Annual): backtest history years: 5 +23 more |
| Platforms & access | ||
Web app | Yes | Yes |
Desktop app | No | Yes |
Mobile app | No | No |
API access | No | Yes |
Broker sync | — | Yes |
Integrations | — | Interactive Brokers and Tradier |
| Audience & fit | ||
Experience level | Beginner, Intermediate | Beginner, Intermediate, Advanced |
Best for | Index/Passive Investors and Long-term Investors | Retail Traders, Pro Retail +5 more |
Categories covered | 6 | 19 |
Regions | Europe | North America, Europe |
| Data & capabilities | ||
Data quality | Adjustments: TotalReturn and Pricing: Model | 5 signals: Latency: Real-time and End of Day, Granularity: EOD +3 more |
Data partners | — | 4 partners: FactSet, S&P Global Market Intelligence +2 more |
Capabilities | Monte Carlo and Rebalancing | 6 signals: Custom formulas, Ranking backtests +4 more |
| Try it | Visit Curvo Backtest | Visit Portfolio123 |
Standout features
The best features of Curvo Backtest and Portfolio123.ShowHide
Standout features
What Curvo Backtest does best
- Set fund weights and compare allocations.
- Model returns using underlying index histories.
- Include each fund's TER in the simulation.
- Test allocation drift thresholds.
- Send a link to the portfolio setup.
What Portfolio123 does best
- Build multifactor ranking systems, stock screens, ETF screens, and rules-based strategies.
- Run simulations with custom universes, buy and sell rules, position sizing, hedging, rebalancing, slippage, and commissions.
- Point-in-time data designed to avoid survivorship and look-ahead bias, with fundamentals, estimates, corporate actions, sector and industry classifications, and historical issues.
- Create ranking systems from fundamental, technical, sentiment, and macro factors, including public factor documentation and FRED-linked economic series.
- AI Factor to train machine-learning predictors for expected returns and feed those predictions into rankings, simulations, and asset-level analysis.
All details
Every attribute we track for Curvo Backtest and Portfolio123.ShowHide
All details
| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | ETFsMutual Funds | StocksETFsClosed-End Funds |
Experience | BeginnerIntermediate | BeginnerIntermediateAdvanced |
Target audience | Index/Passive InvestorsLong-term Investors | Retail TradersPro RetailInstitutional InvestorsAnalystsQuants/DevelopersFinancial AdvisorsStudents/Researchers |
Regions | Europe | North AmericaEurope |
Coverage details | Identifiers: ISIN and Ticker | Countries: US and CAIdentifiers: Ticker |
| Data | ||
Data freshness | Not specified | Real-timeEnd of Day |
Data granularity | Not specified | EOD |
Pricing sources | Model | Not specified |
Data partners | Not specified | FactSetS&P Global Market IntelligenceICE Data ServicesFRED |
| Access & integrations | ||
API protocols | Not specified | REST |
API auth & delivery | Not specified | Auth: APIKeyDocs |
Import methods | Not specified | BrokerOAuthCSV |
Integrations | Not specified | Interactive BrokersTradier |
Export formats | Not specified | CSVJSON |
| Plans & trust | ||
Capability signals | Monte CarloRebalancing | Custom formulasRanking backtestsUniverse builderBroker syncRebalancingCorrelation |
Vendor & support | Not specified | Portfolio123Support: Forum |
Green tags are exclusive to that tool in this comparison.
Pricing
Plans, billing, free trials, and monthly prices.ShowHide
Pricing
| Tier | ||
|---|---|---|
| Free plan | Free | Free“Manage (Free)” |
| Entry paid plan | — | $300/yr≈ $25/mo“Screener (Annual)”backtest history years: 5 · resource units: 400 · +1 more |
| Tier 2 | — | $35/mo“Screener (Monthly)”backtest history years: 5 · resource units: 400 · +1 more |
| Tier 3 | — | $1000/yr≈ $83.33/mo“Backtest (Annual)”backtest history years: 10 · resource units: 1,000 · +1 more |
| Tier 4 | — | $116/mo“Backtest (Monthly)”backtest history years: 10 · resource units: 1,000 · +1 more |
| Tier 5 | — | $1500/yr≈ $125/mo“Portfolio (Annual)”backtest history years: 15 · resource units: 5,000 · +1 more |
| Tier 6 | — | $174/mo“Portfolio (Monthly)”backtest history years: 15 · resource units: 5,000 · +1 more |
| Tier 7 | — | $2400/yr≈ $200/mo“Ultimate (Annual)”backtest history years: 20 · resource units: 10,000 · +1 more |
| Top plan | — | $278/mo“Ultimate (Monthly)”backtest history years: 20 · resource units: 10,000 · +1 more |
| Custom / enterprise | — | Contact sales“Professional / API & Data Licenses” |
Questions we keep getting
What's the difference between Curvo Backtest and Portfolio123?
Curvo Backtest leans toward backtesting, portfolio, and risk metrics, while Portfolio123 puts more weight on screeners, data visualizations, and quant. They overlap in 4 categories, so for most people it comes down to workflow preference and price.
How much do Curvo Backtest and Portfolio123 cost?
Good news: both Curvo Backtest and Portfolio123 have free plans, so you can run them side by side and only pay if you hit a wall.
Which is better for beginners: Curvo Backtest or Portfolio123?
Honestly, neither is aimed at beginners. Expect a learning curve either way; that's the trade-off for the depth they offer.
Does Curvo Backtest or Portfolio123 have an API?
Portfolio123 has an API for programmatic access and custom integrations. Curvo Backtest doesn't, so you're working through its interface.
Should I choose Curvo Backtest or Portfolio123?
It depends on what you're after. Pick Curvo Backtest if risk metrics and monte carlo matter to you; go with Portfolio123 if you'd rather have screeners and quant. And if you only need the basics both share, let price decide.
What asset classes do Curvo Backtest and Portfolio123 cover?
Both cover ETFs. Curvo Backtest also handles mutual funds. Portfolio123 adds stocks and closed-end funds on top.
Does Curvo Backtest or Portfolio123 have real-time data?
Portfolio123 offers real-time data, which matters if you trade actively. Curvo Backtest 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 Curvo Backtest and Portfolio123?
Portfolio123 exports to CSV. Curvo Backtest is stingier about getting data out.
Which has a better stock screener: Curvo Backtest or Portfolio123?
Portfolio123 has a stock screener for surfacing ideas; Curvo Backtest doesn't, and focuses its energy elsewhere.
Can I track my portfolio with Curvo Backtest or Portfolio123?
Yes, both do portfolio tracking: holdings, performance, and allocation in one place.
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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.