BEST INVESTING TOOLS COMPARISON

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Checked September 24, 2026

Tool Comparison

Koyfin vs The Fly Pro

Paid from
$39/mo
Free plan
Yes
Platforms
Web, Mobile

Best if

  • You do a lot of your research from your phone
  • You want custom dashboards, correlation, and portfolio.
Paid from
$31/mo
Free plan
Yes
Platforms
Web, API

Best if

  • You want the cheaper way in: plans start at $31/mo instead of $39/mo
  • You want an API so you can script or automate things
  • You want stock comparison, macro data, and APIs & data feeds.

Pick Koyfin if

Koyfin logo

Koyfin

koyfin.comTested

Free • From $468/yr · Web · Mobile

  • You do a lot of your research from your phone
  • You want custom dashboards, correlation, and portfolio.

Pick The Fly Pro if

The Fly Pro logo

The Fly Pro

thefly.comTested

Free • From $31/yr · Web · API

  • You want the cheaper way in: plans start at $31/mo instead of $39/mo
  • You want an API so you can script or automate things
  • You want stock comparison, macro data, and APIs & data feeds.

Skip both if: Neither one clicks with how you research; there are strong third options.

See alternatives

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Not set on either one? See the top 50 tools, ranked by user votes, or the deals page for big discounts on popular tools.

Our take

The bottom line

Koyfin and The Fly Pro cover a lot of the same ground (10 shared categories, including screeners, ETF screeners, and data visualizations), so for the basics you won't go far wrong with either. Koyfin simply does more: 20 categories to The Fly Pro's 13, including custom dashboards, correlation, and portfolio, plus a mobile app. The Fly Pro counters by starting cheaper at $31/mo.

What readers say

Koyfin

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The Fly Pro

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Key differences at a glance

Cheaper paid plan
The Fly Pro$31/mo vs $39/mo
Free trial
The Fly Pro7 days
Broader coverage
Koyfin20 vs 13 categories
Mobile app
Koyfin
API access
The Fly Pro
Asset coverage
KoyfinAdds mutual funds and closed-end funds
See the full side-by-side table
Koyfin logo

What Koyfin does best

  1. Tools for building customizable dashboards, watchlists, charts, and market monitors across global equities, ETFs, funds, fixed income, FX, commodities, crypto, indices, and economics.
  2. Screening for more than 100,000 global securities with thousands of criteria, with stock and ETF screening on paid plans and mutual-fund screening in Advisor tiers.
  3. Advanced charts with technical indicators, fundamentals, valuation measures, analyst estimates, price targets, templates, sharing, and downloads where vendor licenses allow.
  4. Research coverage for companies with financial analysis pages, customizable financial templates, news, filings, transcripts, analyst data, short interest, and AI transcript summaries on paid plans.
  5. Tracking portfolios with grouping, notes, summary rows, alerts, custom data series, uploaded CSV price history, and mobile portfolio monitoring.
The Fly Pro logo

What The Fly Pro does best

  1. Build company dashboards and financial charts.
  2. Screen stocks and ETFs with fundamental and performance filters.
  3. Research more than 10,000 business metrics and KPIs on Premium and higher plans.
  4. Review 10 years of financial data on Free and Premium or up to 30 years on Ultimate.
  5. Compare company operating metrics and financial data.

Side by side

Pricing & plans
Starting price
Free • From $468/yr
Free • From $31/yr
Free tier
Yes
Yes
Free trial
—
7 days
Platforms & access
Web app
Yes
Yes
Mobile app
Yes
No
API access
No
Yes
Broker sync
Yes
—
Integrations
Schwab, Altruist +6 more
—
Coverage & data
Asset types
StocksETFsMutual FundsClosed-End FundsBondsCurrenciesCommoditiesFutures+1 more
StocksETFs
Target audience
Retail TradersPro RetailInstitutional InvestorsAnalystsAsset ManagersFinancial AdvisorsRIAs / Wealth FirmsStudents/Researchers
Not specified
Data freshness
Real-time15-min DelayedEnd of Day
Real-timeEnd of Day
Data granularity
Not specified
EOD
Export formats
CSVImagePDF
Not specified

Pricing comparison

Tier
The Fly ProCheaper start
Free plan
Free
Free
Entry paid plan
$468/yr≈ $39/mo“Plus”
$31/yr≈ $31/mo“Premium Annual”
Tier 2
$948/yr≈ $79/mo“Premium”
$37/mo“Premium Monthly”
Tier 3
$2508/yr≈ $209/mo“Advisor Core”
$75/yr≈ $75/mo“Ultimate Annual”
Top plan
$3588/yr≈ $299/mo“Advisor Pro”
$90/mo“Ultimate Monthly”
Custom / enterprise
Contact sales“Teams”
Contact sales“Institutional”
Free trial
—
7 days

See for yourself

Side by side

Price, platforms, data, and market coverage.
Show
Side-by-side comparison of Koyfin and The Fly Pro
Attribute
Koyfin logo
Koyfin
The Fly Pro logo
The Fly Pro
Pricing & plans
Starting price
Free • From $468/yrFree • From $31/yr
Free tier
YesYes
Free trial
—7 days
Plan limits
24 limits: Free: watchlists: 2, Free: screens: 2 +22 more8 limits: Premium Annual: regular monthly equivalent usd: 62, Premium Annual: promotion: Limited-time 50% off +6 more
Platforms & access
Web app
YesYes
Mobile app
YesNo
API access
NoYes
Broker sync
Yes—
Integrations
Schwab, Altruist +6 more—
Audience & fit
Experience level
Beginner, Intermediate, AdvancedBeginner, Intermediate, Advanced
Best for
Retail Traders, Pro Retail +6 more—
Categories covered
2013
Regions
North America, Europe, APAC, LatAm, Middle East, AfricaNorth America, Europe
Data & capabilities
Data quality
Latency: Real-time, 15-min Delayed, and End of Day and Adjustments: TotalReturnLatency: Real-time and End of Day and Granularity: EOD
Data partners
6 partners: S&P Global Market Intelligence, Morningstar +4 more—
Capabilities
7 signals: Universe builder, Broker sync +5 more—
Security
4 signals: SOC2, Data residency: US +2 more—
Try itVisit KoyfinVisit The Fly Pro

Standout features

The best features of Koyfin and The Fly Pro.
Show
Koyfin logo

What Koyfin does best

  1. Tools for building customizable dashboards, watchlists, charts, and market monitors across global equities, ETFs, funds, fixed income, FX, commodities, crypto, indices, and economics.
  2. Screening for more than 100,000 global securities with thousands of criteria, with stock and ETF screening on paid plans and mutual-fund screening in Advisor tiers.
  3. Advanced charts with technical indicators, fundamentals, valuation measures, analyst estimates, price targets, templates, sharing, and downloads where vendor licenses allow.
  4. Research coverage for companies with financial analysis pages, customizable financial templates, news, filings, transcripts, analyst data, short interest, and AI transcript summaries on paid plans.
  5. Tracking portfolios with grouping, notes, summary rows, alerts, custom data series, uploaded CSV price history, and mobile portfolio monitoring.
The Fly Pro logo

What The Fly Pro does best

  1. Build company dashboards and financial charts.
  2. Screen stocks and ETFs with fundamental and performance filters.
  3. Research more than 10,000 business metrics and KPIs on Premium and higher plans.
  4. Review 10 years of financial data on Free and Premium or up to 30 years on Ultimate.
  5. Compare company operating metrics and financial data.

All details

Every attribute we track for Koyfin and The Fly Pro.
Show
Attribute
Koyfin logo
Koyfin
The Fly Pro logo
The Fly Pro
Coverage & fit
Asset types
StocksETFsMutual FundsClosed-End FundsBondsCurrenciesCommoditiesFutures+1 more
StocksETFs
Experience
BeginnerIntermediateAdvanced
BeginnerIntermediateAdvanced
Target audience
Retail TradersPro RetailInstitutional InvestorsAnalystsAsset ManagersFinancial AdvisorsRIAs / Wealth FirmsStudents/Researchers
Not specified
Regions
North AmericaEuropeAPACLatAmMiddle EastAfrica
North AmericaEurope
Coverage details
Identifiers: Ticker
Identifiers: Ticker
Data
Data freshness
Real-time15-min DelayedEnd of Day
Real-timeEnd of Day
Data granularity
Not specified
EOD
Data partners
S&P Global Market IntelligenceMorningstarFREDTrading EconomicsTrueFXPolygon.io
Not specified
Access & integrations
Import methods
ManualCSVCustodian
Not specified
Integrations
SchwabAltruistTradePMRInteractive BrokersBlack DiamondOrionFidelityAddepar
Not specified
Export formats
CSVImagePDF
Not specified
Plans & trust
Security & compliance
SOC2Data residency: USEncryption at restEncryption in transit
Not specified
Capability signals
Universe builderBroker syncYield curvesAI summaries: TranscriptsHouseholdingModel portfoliosClient reporting
Not specified
Vendor & support
Koyfin, Inc.Country: United StatesFounded 2016Support: Email
The Fly Inc.Support: Email
Curation ratings
Not specified
Methodology 3/5Reliability 4/5UX 4/5

Green tags are exclusive to that tool in this comparison.

Pricing

Plans, billing, free trials, and monthly prices.
Show
Plan-by-plan pricing comparison of Koyfin and The Fly Pro
Tier
Koyfin logo
Koyfin
The Fly Pro logo
The Fly ProCheaper start
Free plan
Freewatchlists: 2 · screens: 2 · +5 more
Free
Entry paid plan
$468/yr≈ $39/mo“Plus”financials years: 10 · estimates years: 10 · +5 more
$31/yr≈ $31/mo“Premium Annual”regular monthly equivalent usd: 62 · promotion: Limited-time 50% off
Tier 2
$948/yr≈ $79/mo“Premium”alerts: 500 · custom securities: Unlimited
$37/mo“Premium Monthly”regular monthly price usd: 74 · promotion: Limited-time 50% off
Tier 3
$2508/yr≈ $209/mo“Advisor Core”alerts: 500 · reports per month: 10 · +2 more
$75/yr≈ $75/mo“Ultimate Annual”regular monthly equivalent usd: 150 · promotion: Limited-time 50% off
Top plan
$3588/yr≈ $299/mo“Advisor Pro”alerts: 500 · reports per month: 200 · +2 more
$90/mo“Ultimate Monthly”regular monthly price usd: 180 · promotion: Limited-time 50% off
Custom / enterprise
Contact sales“Teams”
Contact sales“Institutional”
Free trial—7 days

Questions we keep getting

What's the difference between Koyfin and The Fly Pro?

Koyfin leans toward screeners, ETF screeners, and data visualizations, while The Fly Pro puts more weight on screeners, data visualizations, and stock comparison. They overlap in 10 categories, so for most people it comes down to workflow preference and price.

How much do Koyfin and The Fly Pro cost?

Good news: both Koyfin and The Fly Pro have free plans, so you can run them side by side and only pay if you hit a wall.

Can I use Koyfin or The Fly Pro on my phone?

Koyfin lists a dedicated mobile app, so it travels better. The Fly Pro doesn't list a dedicated mobile app; its documented access is web and API.

Does Koyfin or The Fly Pro have an API?

The Fly Pro has an API for programmatic access and custom integrations. Koyfin doesn't, so you're working through its interface.

Should I choose Koyfin or The Fly Pro?

It depends on what you're after. Pick Koyfin if custom dashboards and correlation matter to you; go with The Fly Pro if you'd rather have stock comparison and macro data. And if you only need the basics both share, let price decide.

What asset classes do Koyfin and The Fly Pro cover?

Both cover stocks and ETFs. Koyfin also handles mutual funds, closed-end funds, and bonds.

Do Koyfin and The Fly Pro offer real-time data?

Yes, both serve real-time market data, so either works when timing matters.

Can I export data from Koyfin and The Fly Pro?

Koyfin exports to CSV. The Fly Pro is stingier about getting data out.

Which has a better stock screener: Koyfin or The Fly Pro?

Both Koyfin and The Fly Pro include stock screeners, and they differ more in interface than raw power; try both and see which one clicks for you.

Can I track my portfolio with Koyfin or The Fly Pro?

Koyfin handles portfolio tracking. The Fly Pro is really a research tool; you'd track your portfolio elsewhere.

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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.