★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool comparison edition
Tool Comparison
InsideArbitrage vs Koyfin
InsideArbitrage
Best for corporate actions & special situations and dividends
From $100/mo
Koyfin
Best for ETF screeners and custom dashboards
Free • From $39/mo
InsideArbitrage
Best for corporate actions & special situations and dividends
From $100/mo
Koyfin
Best for ETF screeners and custom dashboards
Free • From $39/mo
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The verdict
The bottom line
InsideArbitrage and Koyfin cover a lot of the same ground (7 shared categories, including news, alerts, and calendar), so for the basics you won't go far wrong with either. The real difference is focus: only InsideArbitrage gives you corporate actions & special situations and dividends, and only Koyfin gives you ETF screeners and custom dashboards.
Key differences at a glance
- Mobile app
- Koyfin
- Free plan
- Koyfin
- Cheaper paid plan
- Koyfin$39/mo vs $100/mo
- Broker sync
- Koyfin
- Global coverage
- Koyfin
- Asset coverage
- KoyfinAdds mutual funds and closed-end funds
Choose
InsideArbitrage if…
- You care about corporate actions & special situations, dividends, and splits, things Koyfin doesn't offer
Choose
Koyfin if…
- You do a lot of your research from your phone
- You'd rather start free and only pay if you outgrow it
- You want the cheaper way in: plans start at $39/mo instead of $100/mo
- You care about ETF screeners, custom dashboards, and correlation, things InsideArbitrage doesn't offer
Comparison snapshot
| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | From $100/mo | Free • From $39/mo |
Free tier | No | Yes |
Free trial | — | — |
Plan limits | — | 24 limits: Free: watchlists: 2, Free: screens: 2 +22 more |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | Yes |
API access | No | No |
Broker sync | No | Yes |
Integrations | — | Schwab, Altruist +6 more |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | Retail Traders, Pro Retail +6 more |
Categories covered | 18 | 20 |
Regions | North America | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | 4 signals: Latency: Real-time and End of Day, Granularity: EOD +2 more | Latency: Real-time, 15-min Delayed, and End of Day and Adjustments: TotalReturn |
Data partners | — | 6 partners: S&P Global Market Intelligence, Morningstar +4 more |
Capabilities | Universe builder | 7 signals: Universe builder, Broker sync +5 more |
Security | — | 4 signals: SOC2, Data residency: US +2 more |
| Try it | Visit InsideArbitrage | Visit Koyfin |
Standout features
What InsideArbitrage does best
- Track announced merger-arbitrage deals with spread context, calendars, deal updates, Deals in the Works, and post-mortem research.
- Use tracked-deal workflows to filter relevant news, SEC filings, and tweets around the active-deal symbols a premium user follows.
- Research insider activity with Insider Weekends, cluster buys, buys near highs, flip-floppers, top-performing insiders, sector heat maps, and premium insider screens.
- Monitor buyback situations through daily buyback announcements, searchable buyback history, Buyback Wednesdays, and Double Dipper screens that combine insider buying with repurchases.
- Follow spinoffs, completed spinoffs, Spinsider ideas, CVR deals, CVR outcomes, tender offers, reverse splits, activist campaigns, C-suite transitions, and M&A news feeds.
What Koyfin does best
- Build customizable dashboards, watchlists, charts, and market monitors across global equities, ETFs, funds, fixed income, FX, commodities, crypto, indices, and economics.
- Screen 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.
- Use advanced charts with technical indicators, fundamentals, valuation measures, analyst estimates, price targets, templates, sharing, and downloads where vendor licenses allow.
- Research companies with financial analysis pages, customizable financial templates, news, filings, transcripts, analyst data, short interest, and AI transcript summaries on paid plans.
- Track portfolios with grouping, notes, summary rows, alerts, custom data series, uploaded CSV price history, and mobile portfolio monitoring.
Data & access details
| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksETFsMutual FundsClosed-End FundsBondsCurrenciesCommoditiesFutures+1 more |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Not specified | Retail TradersPro RetailInstitutional InvestorsAnalystsAsset ManagersFinancial AdvisorsRIAs / Wealth FirmsStudents/Researchers |
Regions | North America | North AmericaEuropeAPACLatAmMiddle EastAfrica |
Coverage details | Countries: USExchanges: XNYS, XNAS, and ARCXIdentifiers: Ticker and CIK | Identifiers: Ticker |
| Data | ||
Data freshness | Real-timeEnd of Day | Real-time15-min DelayedEnd of Day |
Data granularity | EOD | Not specified |
Data partners | Not specified | S&P Global Market IntelligenceMorningstarFREDTrading EconomicsTrueFXPolygon.io |
| Access & integrations | ||
Import methods | Manual | ManualCSVCustodian |
Integrations | Not specified | SchwabAltruistTradePMRInteractive BrokersBlack DiamondOrionFidelityAddepar |
Export formats | Not specified | CSVImagePDF |
| Plans & trust | ||
Security & compliance | Not specified | SOC2Data residency: USEncryption at restEncryption in transit |
Capability signals | Universe builder | Universe builderBroker syncYield curvesAI summaries: TranscriptsHouseholdingModel portfoliosClient reporting |
Vendor & support | InsideArbitrageCountry: USSupport: Email | Koyfin, Inc.Country: United StatesFounded 2016Support: Email |
Curation ratings | Methodology 3/5Reliability 3/5UX 4/5 | Not specified |
Green tags are exclusive to that tool in this comparison.
Pricing breakdown
$100/mo
Starting price
Plans & pricing
$39/mo
Lower starting price
Plans & pricing
- watchlists: 2
- screens: 2
- +5 more
- financials years: 10
- estimates years: 10
- +5 more
- alerts: 500
- custom securities: Unlimited
- alerts: 500
- reports per month: 10
- +2 more
- alerts: 500
- reports per month: 200
- +2 more
Coverage overlap
Shared categories
7InsideArbitrage strengths
11Koyfin strengths
13Community category leaders
Vote sentiment comparison
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Frequently Asked Questions
What's the difference between InsideArbitrage and Koyfin?
InsideArbitrage leans toward news, alerts, and calendar, while Koyfin puts more weight on screeners, ETF screeners, and data visualizations. They overlap in 7 categories, so for most people it comes down to workflow preference and price.
Is InsideArbitrage or Koyfin free to use?
Koyfin has a free tier, so you can get started without paying anything. InsideArbitrage is paid-only. If budget matters, start with Koyfin and see how far it takes you before opening your wallet.
Can I use InsideArbitrage or Koyfin on my phone?
Koyfin lists a dedicated mobile app, so it travels better. InsideArbitrage doesn't list a dedicated mobile app; its documented access is web.
Should I choose InsideArbitrage or Koyfin?
It depends on what you're after. Pick InsideArbitrage if corporate actions & special situations and dividends matter to you; go with Koyfin if you'd rather have ETF screeners and custom dashboards. And if you only need the basics both share, let price decide.
What asset classes do InsideArbitrage and Koyfin cover?
Both cover stocks and ETFs. Koyfin adds mutual funds, closed-end funds, and bonds on top.
Do InsideArbitrage and Koyfin offer real-time data?
Yes, both serve real-time market data, so either works when timing matters.
Which covers international markets: InsideArbitrage or Koyfin?
Koyfin has documented international coverage (North America, Europe, APAC, LatAm, and more), so it's the safer bet if you hold non-US stocks. InsideArbitrage is more region-specific, mainly North America.
Can I export data from InsideArbitrage and Koyfin?
Koyfin exports to CSV. InsideArbitrage is stingier about getting data out.
Can InsideArbitrage or Koyfin connect to my broker?
Koyfin syncs with brokers automatically. With InsideArbitrage, you're entering holdings by hand or importing files.
Which has a better stock screener: InsideArbitrage or Koyfin?
Both InsideArbitrage and Koyfin 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 InsideArbitrage or Koyfin?
Yes, both do portfolio tracking: holdings, performance, and allocation in one place.
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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.