VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View Firefly III View Portfolio123 Back to Home

Head-to-head

Firefly III vs Portfolio123 comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

Firefly III adds Webhooks, and Other coverage that Portfolio123 skips.

Portfolio123 includes Screeners, Quant, Backtesting, Correlation, Calendar, Data APIs, Broker Connectors, and Data Visualizations categories that Firefly III omits.

Firefly III highlights: Self-hosted open-source personal finance manager (AGPLv3 license)., Supports double-entry bookkeeping with budgets, categories, tags, and detailed reporting., and Comprehensive REST API (JSON) with OAuth2 and Personal Access Tokens, plus a full OpenAPI specification..

Portfolio123 is known for: Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging..

Firefly III

firefly-iii.org

An open-source, self-hosted personal finance manager licensed under AGPLv3. Offers full double-entry bookkeeping, REST APIs, and optional event webhooks. Exchange-rate conversion is available from v6.2 onward as an opt-in feature. Bank connections are handled separately through the Firefly Data Importer app.

Platforms

Web

API

Pricing

Free

Quick highlights

Self-hosted open-source personal finance manager (AGPLv3 license).
Supports double-entry bookkeeping with budgets, categories, tags, and detailed reporting.
Comprehensive REST API (JSON) with OAuth2 and Personal Access Tokens, plus a full OpenAPI specification.
Event webhooks for transaction create/update/delete, enabled through environment configuration.
Separate Data Importer tool supports CSV and CAMT.053, with optional bank integrations via Salt Edge, GoCardless, and SimpleFIN.

Community votes (overall)

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Portfolio123

portfolio123.com

Editor’s pick Hands-on review

Quant research and live-deployment platform with point-in-time fundamentals and estimates. Users can screen, backtest, and simulate strategies, then deploy them live with broker integrations. Supports API access and a no-code desktop DataMiner. FactSet or S&P Compustat licenses are required for full historical fundamentals.

Platforms

Web

Desktop

API

Pricing

Free

Subscription

Quick highlights

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.
Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead).

Community votes (overall)

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Overlap

Shared focus areas

2 overlaps

Mutual strengths include Portfolio, and APIs & SDKs.

Where they differ

Firefly III

Distinct strengths include:

Webhooks

Other

Self-hosted open-source personal finance manager (AGPLv3 license).
Supports double-entry bookkeeping with budgets, categories, tags, and detailed reporting.
Comprehensive REST API (JSON) with OAuth2 and Personal Access Tokens, plus a full OpenAPI specification.
Event webhooks for transaction create/update/delete, enabled through environment configuration.

Portfolio123

Distinct strengths include:

Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry.
Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data.
Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging.
‘Books’ feature to combine multiple strategies and view correlations between them.

Feature-by-feature breakdown

Attribute	Firefly III	Portfolio123
Categories Which research workflows each platform targets	Shared: Portfolio, APIs & SDKs Unique: Webhooks, Other	Shared: Portfolio, APIs & SDKs Unique: Screeners, Quant, Backtesting, Correlation, Calendar, Data APIs, Broker Connectors, Data Visualizations
Asset types Supported asset classes and universes	Other	Stocks, ETFs
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web, API	Web, Desktop, API
Pricing High-level pricing models	Free	Free, Subscription
Key features Core capabilities called out by each vendor	Unique Self-hosted open-source personal finance manager (AGPLv3 license). Supports double-entry bookkeeping with budgets, categories, tags, and detailed reporting. Comprehensive REST API (JSON) with OAuth2 and Personal Access Tokens, plus a full OpenAPI specification. Event webhooks for transaction create/update/delete, enabled through environment configuration. Separate Data Importer tool supports CSV and CAMT.053, with optional bank integrations via Salt Edge, GoCardless, and SimpleFIN. CSV export available for accounts, budgets, categories, tags, recurring transactions, subscriptions, piggy banks, rules, and more.	Unique Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry. Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data. Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging. ‘Books’ feature to combine multiple strategies and view correlations between them. Point-in-time fundamentals, estimates, and corporate actions with dividends handled on ex/pay dates (no survivorship bias or look-ahead). Coverage of 15,000+ equities in the U.S., Canada, and Europe, including delisted stocks and spinoffs.
Tested Verified by hands-on testing inside Find My Moat	Not yet	Yes
Editor pick Featured inside curated shortlists	Standard listing	Highlighted

Frequently Asked Questions

Which workflows do Firefly III and Portfolio123 both support?

Both platforms cover Portfolio, and APIs & SDKs workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do Firefly III and Portfolio123 require subscriptions?

Both Firefly III and Portfolio123 keep freemium access with optional paid upgrades, so you can trial each platform before committing.

How can you access Firefly III and Portfolio123?

Both Firefly III and Portfolio123 prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

Firefly III differentiates itself with Self-hosted open-source personal finance manager (AGPLv3 license)., Supports double-entry bookkeeping with budgets, categories, tags, and detailed reporting., and Comprehensive REST API (JSON) with OAuth2 and Personal Access Tokens, plus a full OpenAPI specification., whereas Portfolio123 stands out for Build custom multi-factor ranking systems and rank stocks by universe, sector, or industry., Spreadsheet-style screening with formulas (including Piotroski F-Score) across current and historical data., and Backtesting with realistic assumptions for slippage, commissions, buy/sell rules, position sizing, and hedging..

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