EdgeSheet
A daily, plain-English briefing on prediction markets across Polymarket and Kalshi that flags mispriced contracts with the data behind every pick.
Retail prediction-market traders and crypto-curious investors who want an edge without running a bot themselves
- Morning 'edge list' of 5-10 markets whose implied odds look skewed vs. recent prices, volume, and external signals
- Each pick has a one-paragraph 'why,' historical chart, and source links traders can verify
- Watchlist with price alerts and a Friday recap of which edges closed in the money
- Optional read-only API hook so users running their own wallet can act without trusting the app with keys
Polymarket arbitrage bots are exploding on GitHub (195 stars, 2k forks), yet the build-it-yourself barrier keeps most retail punters out — they want a one-screen intelligence layer.
Strong retail interest in prediction markets — Polymarket just landed a $2B ICE investment and Kalshi is surging; multiple dedicated newsletters (The Prob, PredictionDesk) and analytics tools already have audiences, confirming active demand.Kalshi and Polymarket Prediction Markets Turn Truth Into Bets ↗The Prob — Prediction Markets Newsletter | Kalshi & Polymarket News Daily ↗
Market is saturated with near-identical offerings: The Prob, PredictionDesk, Misprice, OutcomeEdge, MeanEdge, TradeAlgo, and iPredicta all already deliver daily briefings, mispricing scanners, and cross-platform analytics for Polymarket + Kalshi.MISPRICE — TradingView for Prediction Markets ↗PredictionDesk ↗OutcomeEdge — Prediction Market Analytics Platform for Kalshi & Polymarket ↗
Existing competitors (Misprice, OutcomeEdge, newsletters) are free or freemium; no clear pricing evidence surfaced for paid-only tiers in this niche, and the retail punters targeted are notoriously price-sensitive, making willingness-to-pay unproven.MISPRICE — TradingView for Prediction Markets ↗The Prob — Prediction Markets Newsletter | Kalshi & Polymarket News Daily ↗
Prediction markets have strong secular tailwinds — institutional backing (ICE/NYSE deal), CFTC-regulated Kalshi expansion, and growing mainstream coverage — but the space is evolving fast and edge may compress as more traders pile in.Kalshi and Polymarket Prediction Markets Turn Truth Into Bets ↗
Straightforward to build — public Polymarket/Kalshi APIs, Python tooling, and several open-source arbitrage bot repos provide ready-made data pipelines and patterns; main work is curation and UI, not novel ML.P-x-J/polymarket-arbitrage-bot - GitHub ↗polymarket-arbitrage-bot · PyPI ↗