Tool Comparison
Diffchecker vs Portfolio123
- Paid from
- $15/mo
- Free plan
- Yes
- Platforms
- Web, Desktop, API
Best if
- You want the cheaper way in: plans start at $15/mo instead of $25/mo
- You want diff view.
- 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 screeners, data visualizations, and quant.
Pick Diffchecker instead if
Diffchecker
Free • From $15/mo · Web · Desktop · API
- You want the cheaper way in: plans start at $15/mo instead of $25/mo
- You want diff view.
Start here
Portfolio123
Free • From $300/yr · Web · API · Desktop
- Delayed quotes won't cut it; you need real-time data
- You want screeners, data visualizations, and quant.
Skip both if: Neither one clicks with how you research; there are strong third options.
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Our take
The bottom line
Portfolio123 simply does more: 19 categories to Diffchecker's 2, including screeners, data visualizations, and quant. Diffchecker counters by starting cheaper at $15/mo. On paper they're closely matched, so let pricing, platform fit, and the details below break the tie.
What readers say
Diffchecker
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Portfolio123
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Key differences at a glance
- Cheaper paid plan
- Diffchecker$15/mo vs $25/mo
- Free trial
- Diffchecker14 days
- Broader coverage
- Portfolio12319 vs 2 categories
- Real-time data
- Portfolio123
- Free plan
- Both
What Diffchecker does best
- Comparison tools for text, Word documents, PDFs, Excel files, images, and folders from a web interface.
- Diffchecker can be used to review changed filing language, revised research notes, spreadsheet edits, model outputs, term sheets, or diligence documents.
- Tools for running desktop comparisons when confidential files should stay offline instead of being uploaded to the web app.
- Redline views, diff merging, real-time text comparison, dark mode, and PDF export on the plans that include them.
- AI difference summaries with limited free web uses and unlimited access on paid web plans.
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 • From $15/mo | Free • From $300/yr |
Free tier | Yes | Yes |
Free trial | 14 days | — |
Plan limits | 6 limits: API Free: requests per month: 50, API Free: max request size: 5 MB +4 more | 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 | Yes | Yes |
Mobile app | No | No |
API access | Yes | Yes |
Broker sync | — | Yes |
Integrations | iManage | Interactive Brokers and Tradier |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | Retail Traders, Pro Retail +5 more |
Categories covered | 2 | 19 |
Regions | — | North America, Europe |
| Data & capabilities | ||
Data quality | — | 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 | — | 6 signals: Custom formulas, Ranking backtests +4 more |
Security | SSO: SAML | — |
| Try it | Visit Diffchecker | Visit Portfolio123 |
Standout features
The best features of Diffchecker and Portfolio123.ShowHide
Standout features
What Diffchecker does best
- Comparison tools for text, Word documents, PDFs, Excel files, images, and folders from a web interface.
- Diffchecker can be used to review changed filing language, revised research notes, spreadsheet edits, model outputs, term sheets, or diligence documents.
- Tools for running desktop comparisons when confidential files should stay offline instead of being uploaded to the web app.
- Redline views, diff merging, real-time text comparison, dark mode, and PDF export on the plans that include them.
- AI difference summaries with limited free web uses and unlimited access on paid web plans.
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 Diffchecker and Portfolio123.ShowHide
All details
| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Other | StocksETFsClosed-End Funds |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Not specified | Retail TradersPro RetailInstitutional InvestorsAnalystsQuants/DevelopersFinancial AdvisorsStudents/Researchers |
Regions | Not specified | North AmericaEurope |
Coverage details | Not specified | Countries: US and CAIdentifiers: Ticker |
| Data | ||
Data freshness | Not specified | Real-timeEnd of Day |
Data granularity | Not specified | EOD |
Data partners | Not specified | FactSetS&P Global Market IntelligenceICE Data ServicesFRED |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKey | Auth: APIKeyDocs |
Import methods | Not specified | BrokerOAuthCSV |
Integrations | iManage | Interactive BrokersTradier |
Export formats | PDF | CSVJSON |
| Plans & trust | ||
Security & compliance | SSO: SAML | Not specified |
Capability signals | Not specified | Custom formulasRanking backtestsUniverse builderBroker syncRebalancingCorrelation |
Vendor & support | Checker Software Inc.Country: CanadaSupport: Email | Portfolio123Support: Forum |
Curation ratings | Methodology 3/5Reliability 4/5UX 4/5 | Not specified |
Green tags are exclusive to that tool in this comparison.
Pricing
Plans, billing, free trials, and monthly prices.ShowHide
Pricing
| Tier | ||
|---|---|---|
| Free plan | Free“Basic” | Free“Manage (Free)” |
| Entry paid plan | $15/mo“Pro + Desktop” | $300/yr≈ $25/mo“Screener (Annual)”backtest history years: 5 · resource units: 400 · +1 more |
| Tier 2 | $20/mo“Legal” | $35/mo“Screener (Monthly)”backtest history years: 5 · resource units: 400 · +1 more |
| Tier 3 | $40/yr≈ $40/mo“Enterprise” | $1000/yr≈ $83.33/mo“Backtest (Annual)”backtest history years: 10 · resource units: 1,000 · +1 more |
| Tier 4 | $99/mo“API Standard”credits per month: 10,000 · max request size: 100 MB | $116/mo“Backtest (Monthly)”backtest history years: 10 · resource units: 1,000 · +1 more |
| Tier 5 | $299/mo“API Business”credits per month: 100,000 · max request size: 100 MB | $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“API Enterprise” | Contact sales“Professional / API & Data Licenses” |
| Free trial | 14 days | — |
Free alternatives
Questions we keep getting
What's the difference between Diffchecker and Portfolio123?
Diffchecker leans toward diff view and APIs & data feeds, while Portfolio123 puts more weight on screeners, data visualizations, and quant. They overlap in 1 categories, so for most people it comes down to workflow preference and price.
How much do Diffchecker and Portfolio123 cost?
Good news: both Diffchecker and Portfolio123 have free plans, so you can run them side by side and only pay if you hit a wall.
Do Diffchecker and Portfolio123 have APIs?
Yes, both offer API access, so developers and quants can pull data programmatically or wire up their own integrations.
Should I choose Diffchecker or Portfolio123?
It depends on what you're after. Pick Diffchecker if diff view matter to you; go with Portfolio123 if you'd rather have screeners and data visualizations. And if you only need the basics both share, let price decide.
What asset classes do Diffchecker and Portfolio123 cover?
Diffchecker covers other. Portfolio123 covers stocks, ETFs, and closed-end funds.
Does Diffchecker or Portfolio123 have real-time data?
Portfolio123 offers real-time data, which matters if you trade actively. Diffchecker 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 Diffchecker and Portfolio123?
Portfolio123 exports to CSV. Diffchecker is stingier about getting data out.
Which has a better stock screener: Diffchecker or Portfolio123?
Portfolio123 has a stock screener for surfacing ideas; Diffchecker doesn't, and focuses its energy elsewhere.
Can I track my portfolio with Diffchecker or Portfolio123?
Portfolio123 handles portfolio tracking. Diffchecker is really a research tool; you'd track your portfolio elsewhere.
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