VOL. XCIV, NO. 247
BEST INVESTING TOOLS COMPARISON
Tool details checked August 23, 2026
Tool Comparison
ChartMill vs Prospero.ai
Pick ChartMill if
ChartMill
Free • Paid plans available · Web
- You want stock comparison, valuation models, and news.
- You've outgrown the basics and want pro-level depth
- You trade often and need tooling built for speed
Pick Prospero.ai if
Prospero.ai
Free • Paid plans available · Mobile
- Delayed quotes won't cut it; you need real-time data
- You do a lot of your research from your phone
- You want ETF screeners, options, and dark pool & off-exchange.
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
ChartMill and Prospero.ai cover a lot of the same ground (9 shared categories, including screeners, stock ideas, and data visualizations), so for the basics you won't go far wrong with either. ChartMill simply does more: 24 categories to Prospero.ai's 13, including stock comparison, valuation models, and news. Prospero.ai counters by being completely free.
What readers say
ChartMill
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Prospero.ai
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Key differences at a glance
- Real-time data
- Prospero.ai
- Broader coverage
- ChartMill24 vs 13 categories
- Mobile app
- Prospero.ai
- Global coverage
- ChartMill
- Free plan
- Both
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 • Paid plans available | Free • Paid plans available |
Free tier | Yes | Yes |
Free trial | — | — |
Plan limits | Free: financials history: 4 years/quarters (free users, example pages). | — |
| Platforms & access | ||
Web app | Yes | No |
Mobile app | No | Yes |
API access | No | No |
Broker sync | — | No |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate |
Best for | Retail Traders, Pro Retail +6 more | — |
Categories covered | 24 | 13 |
Regions | North America, Europe | North America |
| Data & capabilities | ||
Data quality | 3 signals: Latency: 15-min Delayed and End of Day, Granularity: EOD and Minute +1 more | Latency: Real-time and End of Day and Granularity: Minute and EOD |
Capabilities | Custom formulas and Universe builder | — |
| Try it | Visit ChartMill | Visit Prospero.ai |
Where each one shines
What ChartMill and Prospero.ai each do best.ShowHide
Where each one shines
What ChartMill and Prospero.ai each do best.What ChartMill does best
- Screening for stocks and ETFs with technical, fundamental, dividend, valuation, growth, profitability, health, and custom-expression filters.
- Start from Trading Ideas templates for breakouts, pullbacks, CANSLIM, Minervini, GARP, dividends, value, and growth.
- ChartMill ratings, technical setup views, analyzer pages, and fundamental reports to compare candidates.
- Build watchlists, save screens, export results, and set alerts for prices, setups, earnings, news, insider activity, fundamentals, analyst changes, and screen results.
- Multi-chart layouts, saved chart configurations, drawings, indicators, event markers, and watchlist-based charting.
What Prospero.ai does best
- Five short-term scores cover options, social sentiment, dark pools, short pressure, and institutional flow.
- Five longer-horizon scores cover profitability, growth, upside breakout, downside breakout, and similarity to the S&P 500.
- Daily Screener and Our Picks pages identify candidates across short and long horizons.
- Watchlists and in-app notifications are available in the iOS and Android apps.
- Signal guides explain the input, score range, update interval, and stated limitations for each metric.
Every detail we compared
Every tracked attribute for ChartMill and Prospero.ai, side by side.ShowHide
Every detail we compared
Every tracked attribute for ChartMill and Prospero.ai, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFs | StocksETFs |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediate |
Target audience | Retail TradersPro RetailDay TradersSwing TradersLong-term InvestorsGrowth InvestorsValue InvestorsDividend Investors | Not specified |
Regions | North AmericaEurope | North America |
Coverage details | 17 countries9 exchangesIdentifiers: Ticker and ISIN | Countries: USExchanges: XNYS and XNASIdentifiers: Ticker |
| Data | ||
Data freshness | 15-min DelayedEnd of Day | Real-timeEnd of Day |
Data granularity | EODMinute | MinuteEOD |
| Access & integrations | ||
Import methods | Not specified | Manual |
Export formats | CSV | Not specified |
| Plans & trust | ||
Capability signals | Custom formulasUniverse builder | Not specified |
Vendor & support | ChartMill | Prospero.ai LLCCountry: USSupport: Email |
Curation ratings | Not specified | Methodology 3/5Reliability 3/5UX 4/5 |
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 | Freefinancials history: 4 years/quarters (free users, example pages). | Free |
| Entry paid plan | $34.97/mo“Monthly Subscription” | Subscription“Paid tiers” |
| Top plan | $299.97/yr“Annual Subscription + Free Course” | — |
Questions we keep getting
What's the difference between ChartMill and Prospero.ai?
ChartMill leans toward screeners, stock ideas, and stock comparison, while Prospero.ai puts more weight on stock ideas, screeners, and ETF screeners. They overlap in 9 categories, so for most people it comes down to workflow preference and price.
How much do ChartMill and Prospero.ai cost?
Good news: both ChartMill and Prospero.ai have free plans, so you can run them side by side and only pay if you hit a wall.
Which is better for beginners: ChartMill or Prospero.ai?
Honestly, neither is aimed at beginners. Expect a learning curve either way; that's the trade-off for the depth they offer.
Can I use ChartMill or Prospero.ai on my phone?
Prospero.ai lists a dedicated mobile app, so it travels better. ChartMill doesn't list a dedicated mobile app; its documented access is web.
Should I choose ChartMill or Prospero.ai?
It depends on what you're after. Pick ChartMill if stock comparison and valuation models matter to you; go with Prospero.ai if you'd rather have ETF screeners and options. And if you only need the basics both share, let price decide.
Does ChartMill or Prospero.ai have real-time data?
Prospero.ai offers real-time data, which matters if you trade actively. ChartMill runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Which covers international markets: ChartMill or Prospero.ai?
ChartMill has documented international coverage (North America and Europe), so it's the safer bet if you hold non-US stocks. Prospero.ai is more region-specific, mainly North America.
Can I export data from ChartMill and Prospero.ai?
ChartMill exports to CSV. Prospero.ai is stingier about getting data out.
Is ChartMill or Prospero.ai better for day trading?
ChartMill is the one positioned more for active traders. Prospero.ai is the better fit if you care less about fast trading workflows and more about a calmer research process.
Which has a better stock screener: ChartMill or Prospero.ai?
Both ChartMill and Prospero.ai include stock screeners, and they differ more in interface than raw power; try both and see which one clicks for you.
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.