★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Source check: Marketstack checked August 4, 2026
Tool Comparison
Koyfin vs Marketstack
Pick Koyfin if
Koyfin
Free • From $39/mo · Web · Mobile
- You do a lot of your research from your phone
- You care about screeners, ETF screeners, and data visualizations, things Marketstack doesn't offer
- You're newer to investing and want something approachable
Pick Marketstack if
Marketstack
Free • From $9.99/mo · Web · API
- You want the cheaper way in: plans start at $9.99/mo instead of $39/mo
- You want an API so you can script or automate things
- You care about APIs & data feeds, dividends, and splits, things Koyfin doesn't offer
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
Koyfin and Marketstack cover a lot of the same ground (2 shared categories, analyst ratings & price targets and ETF analysis), so for the basics you won't go far wrong with either. Koyfin simply does more: 20 categories to Marketstack's 5, including screeners, ETF screeners, and data visualizations, plus a mobile app. Marketstack counters by starting cheaper at $9.99/mo.
What readers say
Koyfin
Vote once to reveal the community verdict.
Marketstack
Vote once to reveal the community verdict.
Key differences at a glance
- Cheaper paid plan
- Marketstack$9.99/mo vs $39/mo
- Broader coverage
- Koyfin20 vs 5 categories
- Mobile app
- Koyfin
- API access
- Marketstack
- Broker sync
- Koyfin
- Beginner friendly
- Koyfin
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • From $39/mo | Free • From $9.99/mo |
Free tier | Yes | Yes |
Free trial | — | — |
Plan limits | 24 limits: Free: watchlists: 2, Free: screens: 2 +22 more | 12 limits: Free: requests per month: 100, Free: history: 1 year +10 more |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | Yes | No |
API access | No | Yes |
Broker sync | Yes | No |
Integrations | Schwab, Altruist +6 more | — |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Intermediate, Advanced |
Best for | Retail Traders, Pro Retail +6 more | Quants/Developers, Analysts +2 more |
Categories covered | 20 | 5 |
Regions | North America, Europe, APAC, LatAm, Middle East, Africa | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | Latency: Real-time, 15-min Delayed, and End of Day and Adjustments: TotalReturn | 4 signals: Latency: End of Day and Real-time, Granularity: EOD and Minute +2 more |
Data partners | 6 partners: S&P Global Market Intelligence, Morningstar +4 more | Tiingo |
Capabilities | 7 signals: Universe builder, Broker sync +5 more | — |
Security | 4 signals: SOC2, Data residency: US +2 more | Status page and Encryption in transit |
| Try it | Visit Koyfin | Visit Marketstack |
Where each one shines
What Koyfin and Marketstack each do best.ShowHide
Where each one shines
What Koyfin and Marketstack each do best.What Koyfin does best
- Tools for building customizable dashboards, watchlists, charts, and market monitors across global equities, ETFs, funds, fixed income, FX, commodities, crypto, indices, and economics.
- 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.
- Advanced charts with technical indicators, fundamentals, valuation measures, analyst estimates, price targets, templates, sharing, and downloads where vendor licenses allow.
- 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.
- Tracking portfolios with grouping, notes, summary rows, alerts, custom data series, uploaded CSV price history, and mobile portfolio monitoring.
What Marketstack does best
- V2 REST/JSON endpoints with API-key authentication for market data and reference data workflows.
- Starting point: end-of-day prices, adjusted fields, splits, dividends, ticker metadata, exchange metadata, currencies, and timezones.
- Historical date ranges for EOD history, with deeper history available on paid tiers.
- Intraday bar intervals down to one minute where plan access and endpoint limits allow.
- Upgrade to Professional or higher for real-time-style updates, real-time stock price endpoints, and commodities endpoints.
Every detail we compared
Every tracked attribute for Koyfin and Marketstack, side by side.ShowHide
Every detail we compared
Every tracked attribute for Koyfin and Marketstack, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFsMutual FundsClosed-End FundsBondsCurrenciesCommoditiesFutures+1 more | StocksETFsBondsCommoditiesOther |
Experience | BeginnerIntermediateAdvanced | IntermediateAdvanced |
Target audience | Retail TradersPro RetailInstitutional InvestorsAnalystsAsset ManagersFinancial AdvisorsRIAs / Wealth FirmsStudents/Researchers | Quants/DevelopersAnalystsInstitutional InvestorsStudents/Researchers |
Regions | North AmericaEuropeAPACLatAmMiddle EastAfrica | North AmericaEuropeAPACLatAmMiddle EastAfrica |
Coverage details | Identifiers: Ticker | Identifiers: Ticker, CIK, ISIN, and CUSIP |
| Data | ||
Data freshness | Real-time15-min DelayedEnd of Day | End of DayReal-time |
Data granularity | Not specified | EODMinute |
Data partners | S&P Global Market IntelligenceMorningstarFREDTrading EconomicsTrueFXPolygon.io | Tiingo |
| Access & integrations | ||
API protocols | Not specified | REST |
API auth & delivery | Not specified | Auth: APIKeyDocs |
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 | Status pageEncryption in transit |
Capability signals | Universe builderBroker syncYield curvesAI summaries: TranscriptsHouseholdingModel portfoliosClient reporting | Not specified |
Vendor & support | Koyfin, Inc.Country: United StatesFounded 2016Support: Email | APILayerFounded 2018Support: Email |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | Freewatchlists: 2 · screens: 2 · +5 more | Freerequests per month: 100 · history: 1 year · +1 more |
| Entry paid plan | $39/mo“Plus”financials years: 10 · estimates years: 10 · +5 more | $9.99/mo“Basic”requests per month: 10,000 · overage per request usd: 0.004 · +2 more |
| Tier 2 | $79/mo“Premium”alerts: 500 · custom securities: Unlimited | $49.99/mo“Professional”requests per month: 100,000 · overage per request usd: 0.002 · +1 more |
| Tier 3 | $209/mo“Advisor Core”alerts: 500 · reports per month: 10 · +2 more | $149.99/mo“Business”requests per month: 500,000 · overage per request usd: 0.001 |
| Top plan | $299/mo“Advisor Pro”alerts: 500 · reports per month: 200 · +2 more | — |
| Custom / enterprise | Contact sales“Teams” | Contact sales“Enterprise” |
Questions we keep getting
What's the difference between Koyfin and Marketstack?
Koyfin leans toward screeners, ETF screeners, and data visualizations, while Marketstack puts more weight on APIs & data feeds, dividends, and splits. They overlap in 2 categories, so for most people it comes down to workflow preference and price.
How much do Koyfin and Marketstack cost?
Good news: both Koyfin and Marketstack have free plans, so you can run them side by side and only pay if you hit a wall.
Which is better for beginners: Koyfin or Marketstack?
Koyfin is the friendlier place to start; its interface takes less getting used to. Both work fine once you're past the basics.
Can I use Koyfin or Marketstack on my phone?
Koyfin lists a dedicated mobile app, so it travels better. Marketstack doesn't list a dedicated mobile app; its documented access is web and API.
Does Koyfin or Marketstack have an API?
Marketstack has an API for programmatic access and custom integrations. Koyfin doesn't, so you're working through its interface.
Should I choose Koyfin or Marketstack?
It depends on what you're after. Pick Koyfin if screeners and ETF screeners matter to you; go with Marketstack if you'd rather have APIs & data feeds and dividends. And if you only need the basics both share, let price decide.
What asset classes do Koyfin and Marketstack cover?
Both cover stocks, ETFs, bonds, and commodities. Koyfin also handles mutual funds, closed-end funds, and currencies. Marketstack adds other on top.
Do Koyfin and Marketstack offer real-time data?
Yes, both serve real-time market data, so either works when timing matters.
Can I export data from Koyfin and Marketstack?
Koyfin exports to CSV. Marketstack is stingier about getting data out.
Can Koyfin or Marketstack connect to my broker?
Koyfin syncs with brokers automatically. With Marketstack, you're entering holdings by hand or importing files.
Which has a better stock screener: Koyfin or Marketstack?
Koyfin has a stock screener for surfacing ideas; Marketstack doesn't, and focuses its energy elsewhere.
Can I track my portfolio with Koyfin or Marketstack?
Koyfin handles portfolio tracking. Marketstack is really a research tool; you'd track your portfolio elsewhere.
Keep researching
More comparisons to check
Other tools you might like
Keep Exploring
Feedback
Spot stale pricing, missing features, or a comparison that feels off? Send feedback on the verdict, table, alternatives, or recommendation.
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.