Prospero.ai adds Stock Ideas, Screeners, ETF Screeners, Data Visualizations, Options & Derivatives, Watchlist, Alerts, Market Sentiment, Dark Pool & Off-Exchange, Scores, and Blogs coverage that r/SecurityAnalysis — Letters Wiki skips.
VOL. XCIV, NO. 247
★ FINANCIAL TOOLS & SERVICES DIRECTORY ★
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Saturday, November 1, 2025
Tool Comparison
Prospero.ai vs r/SecurityAnalysis — Letters Wiki comparison
Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.
Quick takeaways
r/SecurityAnalysis — Letters Wiki includes Forums, and Playbooks & Case Studies categories that Prospero.ai omits.
Prospero.ai ships a mobile app. r/SecurityAnalysis — Letters Wiki is web/desktop only.
In depth comparison
Prospero.ai
prospero.ai
Mobile-first AI signals app for U.S. stocks & ETFs. Offers 10 proprietary signals (5 short-term: Net Options Sentiment, Net Social Sentiment, Net Institutional Flow, Dark Pool, Short Pressure; 5 long-term: Upside/Downside Breakout, Profitability, Growth, Market Similarity), plus a Daily Screener, ‘Our Picks’, watchlists, and notifications. No broker sync, public API, or advanced options greeks/IV surfaces are documented.
Categories
Platforms
Mobile
Pricing
Free
Quick highlights
- Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
- Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
- Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
- Mobile apps on iOS and Android with watchlists and in‑app notifications.
- Education hub with plain‑English signal docs plus investing/trading newsletters (Substack).
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r/SecurityAnalysis — Letters Wiki
reddit.com
Community‑maintained directory of investor/fund letters and reports, organized by year/quarter. Publicly viewable; edits limited to approved contributors. Links out to original PDFs/posts on managers’ sites. No data feeds, APIs, or exports—pure research reading list.
Platforms
Web
Pricing
Free
Quick highlights
- Chronological index of letters grouped by year and quarter (2016→present in the wiki).
- Publicly readable wiki page with edit permissions restricted to approved users/moderators.
- ‘Others’ section pointing to classic collections (e.g., Austin Value, Nomad Partnership, Peter Lynch).
- Direct outbound links to the letters on manager sites; useful for primary-source research.
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Where they differ
Prospero.ai
Distinct strengths include:
Stock IdeasScreenersETF ScreenersData VisualizationsOptions & DerivativesWatchlistAlertsMarket Sentiment
- Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
- Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
- Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
- Mobile apps on iOS and Android with watchlists and in‑app notifications.
r/SecurityAnalysis — Letters Wiki
Distinct strengths include:
- Chronological index of letters grouped by year and quarter (2016→present in the wiki).
- Publicly readable wiki page with edit permissions restricted to approved users/moderators.
- ‘Others’ section pointing to classic collections (e.g., Austin Value, Nomad Partnership, Peter Lynch).
- Direct outbound links to the letters on manager sites; useful for primary-source research.
Feature-by-feature breakdown
| Attribute | Prospero.ai | r/SecurityAnalysis — Letters Wiki |
|---|---|---|
Categories Which research workflows each platform targets | Shared: Education, Newsletters Unique: Stock Ideas, Screeners, ETF Screeners, Data Visualizations, Options & Derivatives, Watchlist, Alerts, Market Sentiment, Dark Pool & Off-Exchange, Scores, Blogs | Shared: Education, Newsletters Unique: Forums, Playbooks & Case Studies |
Asset types Supported asset classes and universes | Stocks, ETFs | Other |
Experience levels Who each product is built for | Beginner, Intermediate | Beginner, Intermediate, Advanced |
Platforms Where you can access the product | Mobile | Web |
Pricing High-level pricing models | Free | Free |
Key features Core capabilities called out by each vendor | Unique
| Unique
|
Tested Verified by hands-on testing inside Find My Moat | Not yet | Not yet |
Editor pick Featured inside curated shortlists | Standard listing | Standard listing |
Frequently Asked Questions
Which workflows do Prospero.ai and r/SecurityAnalysis — Letters Wiki both support?
Both platforms cover Education, and Newsletters workflows, so you can research those use cases in either tool before digging into the feature differences below.
Do Prospero.ai and r/SecurityAnalysis — Letters Wiki require subscriptions?
Both Prospero.ai and r/SecurityAnalysis — Letters Wiki keep freemium access with optional paid upgrades, so you can trial each platform before committing.
Which tool has mobile access?
Prospero.ai ships a dedicated mobile experience, while r/SecurityAnalysis — Letters Wiki focuses on web or desktop access.
What unique strengths set the two platforms apart?
Prospero.ai differentiates itself with Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity)., Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation)., and Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term)., whereas r/SecurityAnalysis — Letters Wiki stands out for Chronological index of letters grouped by year and quarter (2016→present in the wiki)., Publicly readable wiki page with edit permissions restricted to approved users/moderators., and ‘Others’ section pointing to classic collections (e.g., Austin Value, Nomad Partnership, Peter Lynch)..
Keep exploring
Keep exploring
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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.