VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 5, 2025

View Firefly IIIView MarketInOutBack to Home

Head-to-head

Firefly III vs MarketInOut 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 MarketInOut skips.

MarketInOut includes Screeners, Backtesting, Watchlist, Correlation, and Alerts 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..

MarketInOut is known for: Multi-market stock screener covering 35+ exchanges, with both technical and fundamental criteria. Filters can be applied by exchange, sector, industry, index, or watchlist. Timeframes include hourly, daily, weekly, and monthly, with per-stock Excel exports., Intraday timeframes (5m/15m/30m/1h/4h) are available for IEX, Forex, and Crypto. Extended-hours trading is not supported., and Formula Screener allows custom queries with AND/OR/NOT logic, multi-timeframe conditions, historical/range screening, index and ticker references, and regime filters..

Firefly III logo

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.

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MarketInOut logo

MarketInOut

marketinout.com

Screener and backtesting platform with one-time memberships (6-month, 1-year, or 2-year). A limited free tier is available, but some results and features are gated. Supports near real-time data for U.S. equities, TSX, Forex, and Crypto; other exchanges are delayed by 15 minutes. Intraday periods are available for IEX, Forex, and Crypto only; extended-hours data is not supported. API access for screener data can be requested separately. Discounts are offered for crypto payments.

Platforms

Web

Pricing

Free
One-time

Quick highlights

  • Multi-market stock screener covering 35+ exchanges, with both technical and fundamental criteria. Filters can be applied by exchange, sector, industry, index, or watchlist. Timeframes include hourly, daily, weekly, and monthly, with per-stock Excel exports.
  • Intraday timeframes (5m/15m/30m/1h/4h) are available for IEX, Forex, and Crypto. Extended-hours trading is not supported.
  • Formula Screener allows custom queries with AND/OR/NOT logic, multi-timeframe conditions, historical/range screening, index and ticker references, and regime filters.
  • Email or Telegram alerts for screener matches, with scheduled delivery options. SMS delivery is not guaranteed.
  • Strategy Backtester supports entry/exit rules, stop-loss/take-profit, and position maintenance. Data is survivorship-bias-free (includes delisted stocks).

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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.

MarketInOut

Distinct strengths include:

Screeners
Backtesting
Watchlist
Correlation
Alerts
  • Multi-market stock screener covering 35+ exchanges, with both technical and fundamental criteria. Filters can be applied by exchange, sector, industry, index, or watchlist. Timeframes include hourly, daily, weekly, and monthly, with per-stock Excel exports.
  • Intraday timeframes (5m/15m/30m/1h/4h) are available for IEX, Forex, and Crypto. Extended-hours trading is not supported.
  • Formula Screener allows custom queries with AND/OR/NOT logic, multi-timeframe conditions, historical/range screening, index and ticker references, and regime filters.
  • Email or Telegram alerts for screener matches, with scheduled delivery options. SMS delivery is not guaranteed.

Feature-by-feature breakdown

AttributeFirefly IIIMarketInOut
Categories

Which research workflows each platform targets

Shared: Portfolio, APIs & SDKs

Unique: Webhooks, Other

Shared: Portfolio, APIs & SDKs

Unique: Screeners, Backtesting, Watchlist, Correlation, Alerts

Asset types

Supported asset classes and universes

Other

Stocks, ETFs, Currencies, Cryptos

Experience levels

Who each product is built for

Beginner, Intermediate, Advanced

Beginner, Intermediate, Advanced

Platforms

Where you can access the product

Web, API

Web

Pricing

High-level pricing models

Free

Free, One-time

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

  • Multi-market stock screener covering 35+ exchanges, with both technical and fundamental criteria. Filters can be applied by exchange, sector, industry, index, or watchlist. Timeframes include hourly, daily, weekly, and monthly, with per-stock Excel exports.
  • Intraday timeframes (5m/15m/30m/1h/4h) are available for IEX, Forex, and Crypto. Extended-hours trading is not supported.
  • Formula Screener allows custom queries with AND/OR/NOT logic, multi-timeframe conditions, historical/range screening, index and ticker references, and regime filters.
  • Email or Telegram alerts for screener matches, with scheduled delivery options. SMS delivery is not guaranteed.
  • Strategy Backtester supports entry/exit rules, stop-loss/take-profit, and position maintenance. Data is survivorship-bias-free (includes delisted stocks).
  • Portfolio tracker with unlimited portfolios, intra-day last prices, daily P/L, and simple paper-trading views. Positions can be added directly from screener results.
Tested

Verified by hands-on testing inside Find My Moat

Not yet

Not yet

Editor pick

Featured inside curated shortlists

Standard listing

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Frequently Asked Questions

Which workflows do Firefly III and MarketInOut 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 MarketInOut require subscriptions?

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

How can you access Firefly III and MarketInOut?

Both Firefly III and MarketInOut 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 MarketInOut stands out for Multi-market stock screener covering 35+ exchanges, with both technical and fundamental criteria. Filters can be applied by exchange, sector, industry, index, or watchlist. Timeframes include hourly, daily, weekly, and monthly, with per-stock Excel exports., Intraday timeframes (5m/15m/30m/1h/4h) are available for IEX, Forex, and Crypto. Extended-hours trading is not supported., and Formula Screener allows custom queries with AND/OR/NOT logic, multi-timeframe conditions, historical/range screening, index and ticker references, and regime filters..

Keep exploring

Stay on top of related tools

Browse the categories and profiles that overlap most with this comparison to round out your shortlist.

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.