The platform
Every feature, in detail.
A self-guided tour of what Compounder does. Click any section to jump straight to it.
01 — Compounder Score™
A 0–100 quality + value composite, fully transparent.
Five components, each 0–20: profitability, capital structure, cash quality, valuation, stability. Every component shows its rationale per stock — no black boxes. Inspired by Piotroski's F-Score, Altman's Z-Score, and the Buffett/Munger framework on quality compounders at fair prices.
- ›Computed live from ingested fundamentals + market cap
- ›Linear bands; no opaque curve-fits
- ›Tier labels: Excellent (75–100), Solid (50–75), Mixed (25–50), Weak (0–25)
- ›Side-by-side compare vs F-Score and Z-Score
02 — AI Analyst
Ask a question. See exactly how it answered.
Type natural-language queries; the AI runs the right tool — screener, snapshot, fundamentals fetch, 13F lookup — and shows you the trace. No hallucination, no opaque reasoning. Every claim is sourced.
- ›"Compare AAPL and MSFT on FCF margin"
- ›"What did Buffett buy this quarter?"
- ›"Run buffett-quality on the S&P 500"
- ›Tool calls visible in every response
03 — Screeners
Five canonical strategies. One click each.
Buffett-quality, Magic-formula, Net-net, Piotroski-9, Dividend-aristocrats — all preset, all explained. On Pro, build and save your own custom screens.
- ›Run any preset on thousands of US listings in seconds
- ›Each strategy explains its origin and rationale
- ›Pro: custom screeners with saved filters
- ›Studio+: schedule screens to email/digest
04 — Legend tracking (13F)
What dozens of the world's best investors are buying.
Quarterly 13F filings from Buffett, Klarman, Burry, Ackman, Druckenmiller, Marks, Pabrai, Li Lu, and 40 others. Browse each legend's full portfolio, the consensus picks across all of them, and new/added/reduced/sold-out deltas vs the prior quarter.
- ›49 tracked managers, refreshed every 13F cycle (45-day SEC lag)
- ›Consensus view: most-held tickers across all legends
- ›Per-legend portfolio with delta badges (new/added/reduced/sold)
- ›Alert kind: notify me when this legend moves
05 — Alerts
Signals tuned for value investors, not day-traders.
Four alert kinds, all server-evaluated after EOD ingest. Delivered to the in-app inbox + (optional) email. Each rule is fully configurable.
- ›Fat-pitch: high-quality stock on your watchlist enters a cheap valuation band
- ›Score regime: a ticker's Compounder Score tier changes (Excellent → Solid, etc.)
- ›Quality-streak: long ROE / FCF-margin run just broke (early warning)
- ›Legend 13F: new filing on a ticker you're watching
06 — Personalized training
Every Sunday, a 2-minute lesson built around YOUR portfolio.
Generic market newsletters teach generic things. Compounder teaches what matters for the names you actually own — what moved, what changed in the fundamentals, what to watch next. Delivered as a short video so you actually finish it. The format is video; the value is faster, more relevant learning.
- ›Tied to YOUR positions, not a generic market wrap
- ›Covers stocks AND crypto in your portfolio
- ›Generated end-to-end automatically
- ›Replaces hours of weekend research
- ›Pro tier feature ($49/mo)
08 — Price chart
Multi-asset, multi-benchmark price history.
On every stock and every crypto page. Six ranges, three intervals, three modes ($, %, ratio). Auto-overlays SPY + the sector ETF; add up to 3 custom comparison tickers. Drawdown bands shade the chart wherever the ticker fell more than 10% from a peak. Brush at the bottom for zoom. Log scale lets you eyeball a 5-year compounder vs the broad market on one screen.
- ›Ranges: 1M / 3M / 6M / 1Y / 5Y / MAX
- ›Modes: $ price, % change, ratio (log returns)
- ›Auto-include SPY + the matched SPDR sector ETF; toggle either off
- ›Custom comparison tickers — type and add (3 max)
- ›Drawdown bands + brush zoom + linear / log scale
09 — Insider transactions (Form 4)
Cluster buys are the signal. Compounder shows them first.
Daily Form 4 ingest across the universe. Each stock's Insiders tab lists every reported transaction with insider name, role, shares, price, and code (P/S/A/M/F). The Signals page surfaces the rolling 30-day cluster-buy and cluster-sell signals — tickers where ≥3 distinct insiders bought (or sold) on the open market in concert. Insiders rarely buy in size for any reason but upside.
- ›Per-stock filters: All / Buys / Sells / Awards / Exercises
- ›Insider name, position, shares, price, value, post-trade holding
- ›Cluster-buy and cluster-sell signals: rolling 30-day window, ≥3 insider threshold
- ›Universe-wide /signals/cluster-buys and /signals/cluster-sells APIs for power users
10 — Industry analysis
Compare entire sectors at a glance.
A sortable heatmap of every sector with median Compounder Score, score coverage, total market cap, and the top three tickers by score in each. Drill into any sector for the full ranked list — find the strongest stock in financials, the weakest in REITs, and what to do about it. Each sector links to its SPDR ETF for benchmark comparison.
- ›Sector heatmap colored by median Compounder Score
- ›Top-3 tickers by score per sector, one click to the stock page
- ›Sector detail with full ranked roster (sortable by score or market cap)
- ›Sector chips on every stock page link straight to industries view
11 — Backtesting
Test any strategy against history, point-in-time.
Pick a strategy archetype (Compounder Score top quintile, Buffett quality, Graham net-net), a date range, a rebalance frequency, and transaction costs. The engine uses lagged fundamentals so there's no look-ahead bias, and overlays your strategy curve against SPY (or any other ticker you add). CAGR, Sharpe, Max Drawdown, volatility — all computed and persisted. Run it again next month, compare results.
- ›Strategies: Compounder Score (top %), Buffett quality (score ≥ 70), Graham net-net (stub)
- ›Rebalance: monthly / quarterly / yearly
- ›Transaction-cost modeling in basis points
- ›Multi-benchmark overlay (SPY, QQQ, sector ETFs, anything)
- ›Persisted run history — every backtest you run is reproducible later
12 — Crypto coverage
50 tokens, same chart depth, same flywheel.
Curated coverage of the top 50 tokens by market cap. Each token gets the full price-chart treatment with BTC auto-included as the market benchmark (or ETH if you're already on BTC). Add tokens to your watchlist; they feed into the same personalized weekly content engine. Pro tier.
- ›Curated universe (BTC, ETH, SOL, BNB, XRP, ADA, DOGE, AVAX, +42 more)
- ›Daily snapshot: price, 24h change, market cap, volume
- ›Same multi-mode chart as stocks; auto-benchmark BTC/ETH
- ›Watchlist + future personalized weekly crypto video
13 — Referral rewards
Share the platform; earn months of Pro.
Every account gets an 8-character referral code at signup. Sign-ups attributed to your code that go on to subscribe earn you a month of Pro each. Hit three qualified referrals and your total grant tops up to six months. Track your funnel from /refer.
- ›1 month of Pro per qualified (paid) referral, automatic via Stripe webhook
- ›3-friend milestone: total grant tops up to 6 months
- ›Referral funnel + milestone progress on /refer
- ›Shareable Compounder Score cards (auto OG image) double as referral bait
Try the free tier in 30 seconds.
No card required. Upgrade only when you're ready.