★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool details checked August 23, 2026
Tool Comparison
Fey vs Reflexivity
Pick Fey if
Fey
Contact for pricing · Desktop · Web
- You care about watchlist, news sentiment, and improved filings, things Reflexivity doesn't offer
- You're newer to investing and want something approachable
Pick Reflexivity if
Reflexivity
Free • From $99.99/mo · Web · API
- You'd rather start free and only pay if you outgrow it
- You want an API so you can script or automate things
- You care about quant, performance attribution, and scenario & stress tests, things Fey 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
Fey and Reflexivity cover a lot of the same ground (7 shared categories, including screeners, portfolio, and news), so for the basics you won't go far wrong with either. The real difference is focus: only Fey gives you watchlist and news sentiment, and only Reflexivity gives you quant and performance attribution.
What readers say
Fey
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Reflexivity
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Key differences at a glance
- Free plan
- Reflexivity
- Desktop app
- Fey
- API access
- Reflexivity
- Broker sync
- Fey
- Global coverage
- Reflexivity
- Asset coverage
- ReflexivityAdds bonds and commodities
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 | Contact for pricing | Free • From $99.99/mo |
Free tier | No | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Desktop app | Yes | No |
Mobile app | No | No |
API access | No | Yes |
Broker sync | Yes | No |
Integrations | Plaid, Interactive Brokers +1 more | — |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Intermediate, Advanced |
Best for | — | — |
Categories covered | 13 | 13 |
Regions | North America | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Data quality | 5 signals: Latency: Real-time and End of Day, Granularity: Minute and EOD +3 more | Latency: Real-time and End of Day and Granularity: EOD |
Capabilities | 5 signals: Universe builder, Factors: Value, Growth, Momentum, Quality, and Size +3 more | 5 signals: Universe builder, Stress tests: Rates, FX, and EquityCrash +3 more |
Security | — | SOC2 |
| Try it | Visit Fey | Visit Reflexivity |
Where each one shines
What Fey and Reflexivity each do best.ShowHide
Where each one shines
What Fey and Reflexivity each do best.What Fey does best
- The Finder converted natural-language prompts into editable stock screens.
- The Earnings workspace combined press releases, live calls, transcripts, charts, and generated summaries.
- Filing tools generated section summaries for 10-K and 10-Q reports.
- Portfolio tools supported linked and manually entered accounts, performance comparisons, and company-specific research.
- Fey also offered company financials, analyst estimates, peer comparisons, ETF breakdowns, news, and event calendars.
What Reflexivity does best
- AI research workflows over institutional datasets from providers such as S&P Global, LSEG Datastream, Nasdaq, Cboe, and other sources included in the platform.
- Tools for running Deep Research workflows that can analyze data, write and execute code, create research reports, and export data or visualizations.
- Search across filings, transcripts, presentations, central bank documents, and proprietary uploads through Document Intelligence.
- OCR on charts and tables so documents can become searchable and analyzable research inputs.
- Monitor portfolios with real-time alerts, risk and exposure analytics, performance attribution, and daily insight generation.
Every detail we compared
Every tracked attribute for Fey and Reflexivity, side by side.ShowHide
Every detail we compared
Every tracked attribute for Fey and Reflexivity, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksETFsBondsCommoditiesCurrencies |
Experience | BeginnerIntermediateAdvanced | IntermediateAdvanced |
Regions | North America | North AmericaEuropeAPACLatAmMiddle EastAfrica |
Coverage details | Countries: US and CAIdentifiers: Ticker | Identifiers: Ticker |
| Data | ||
Data freshness | Real-timeEnd of Day | Real-timeEnd of Day |
Data granularity | MinuteEOD | EOD |
| Access & integrations | ||
Import methods | BrokerOAuthPlaidManual | CSVManual |
Integrations | PlaidInteractive BrokersE*TRADE | Not specified |
Export formats | Excel | Excel |
| Plans & trust | ||
Security & compliance | Not specified | SOC2 |
Capability signals | Universe builderFactors: Value, Growth, Momentum, Quality, and SizeBroker syncPortfolio factor exposureAI summaries: Filings, Transcripts, and News | Universe builderStress tests: Rates, FX, and EquityCrashPortfolio attributionCitation pinningAI summaries: Filings, Transcripts, and News |
Vendor & support | Fey Labs, Inc.Country: CanadaFounded 2021Support: Email | Knabble, Inc. (dba Reflexivity)Country: United StatesSupport: Email |
Curation ratings | Methodology 3/5Reliability 4/5UX 5/5 | Not specified |
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 | — | Free“Basic via IBKR” |
| Entry paid plan | — | $99.99/mo“Plus via IBKR” |
| Custom / enterprise | Contact sales“Standalone Fey” | Contact sales“Institutional” |
Questions we keep getting
What's the difference between Fey and Reflexivity?
Fey leans toward screeners, portfolio, and watchlist, while Reflexivity puts more weight on screeners, quant, and performance attribution. They overlap in 7 categories, so for most people it comes down to workflow preference and price.
Is Fey or Reflexivity free to use?
Reflexivity has a free tier, so you can get started without paying anything. Fey is paid-only. If budget matters, start with Reflexivity and see how far it takes you before opening your wallet.
Which is better for beginners: Fey or Reflexivity?
Fey is the friendlier place to start; its interface takes less getting used to. Both work fine once you're past the basics.
Does Fey or Reflexivity have an API?
Reflexivity has an API for programmatic access and custom integrations. Fey doesn't, so you're working through its interface.
Should I choose Fey or Reflexivity?
It depends on what you're after. Pick Fey if watchlist and news sentiment matter to you; go with Reflexivity if you'd rather have quant and performance attribution. And if you only need the basics both share, let price decide.
What asset classes do Fey and Reflexivity cover?
Both cover stocks and ETFs. Reflexivity adds bonds, commodities, and currencies on top.
Do Fey and Reflexivity offer real-time data?
Yes, both serve real-time market data, so either works when timing matters.
Which covers international markets: Fey or Reflexivity?
Reflexivity has documented international coverage (North America, Europe, APAC, LatAm, and more), so it's the safer bet if you hold non-US stocks. Fey is more region-specific, mainly North America.
Can I export data from Fey and Reflexivity?
Yes, both export to spreadsheets (Excel), which is handy if you like running your own numbers.
Can Fey or Reflexivity connect to my broker?
Fey syncs with brokers automatically. With Reflexivity, you're entering holdings by hand or importing files.
Which has a better stock screener: Fey or Reflexivity?
Both Fey and Reflexivity 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 Fey or Reflexivity?
Yes, both do portfolio tracking: holdings, performance, and allocation in one place.
Keep researching
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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.