Arbitrage bots
Bots that exploit price differences between correlated or mispriced markets, closing the spread for low-risk profit.
PillarLab
Platforms & ToolsAI market analyzer for Kalshi and Polymarket. Paste a market URL and it pulls live market data plus four or five parallel intelligence sources, then returns a nine-pillar breakdown and a Best Trade call with an edge estimate in about 30 seconds. The nine pillars are tailored per category: Vegas lines, line movement and injury reports for sports; GFS/ECMWF/NWS forecast consensus and ensemble spread for weather; polls-versus-odds divergence for politics; technicals, institutional flows and macro for finance. Every category ends on a contrarian check.
Predikt
Platforms & ToolsDeFi infrastructure protocol that unifies prediction markets into one layer. Aggregates 500k+ markets across venues, tokenizes idle positions into composable DeFi assets, and routes execution through a solver-based, intent-driven engine — all behind a single API and SDK. Cross-chain (Solana & Sui); largely in beta.
Predictefy
ArbitrageInstitutional-grade infrastructure across every prediction market venue. Matches identical markets on Polymarket, Kalshi, Hyperliquid, Limitless and more, then streams cross-venue arbitrage — spread, size, liquidity and route — in real time. Ships a market-data API, SDK, smart order router, MCP server and agent CLI, plus historical data back to 2020.
Polymarket Bot Skill
ArbitrageClaude Code skill that turns an AI coding agent into a Polymarket bot builder. Ships modular Python scripts for the Gamma and CLOB APIs — market research, price monitoring, arbitrage detection and trade execution — with built-in auth, key derivation and rate-limit handling. Installs into Claude Code, Cowork, Codex and other agents.
PolymarketAlpha
Crypto MarketsAutonomous AI agents that scan, analyze and execute on Polymarket across sports, crypto (5m, 15m, 1h) and weather markets — no manual intervention. Backed by a custom-built desk that also ships professional on-chain Solana bots (MEV, arbitrage, sniping and market making).
PolymTradeBot
Editor's ChoiceCrypto MarketsAutomated Python bot for Polymarket's 5- and 15-minute Bitcoin & Ethereum up/down markets. Trades live or in paper mode with configurable risk controls, self-hosted from full source.
Prediction Hunt
Platforms & ToolsOdds aggregator and tools directory for prediction markets. Compares side-by-side pricing for the same market across Polymarket, Kalshi and PredictIt to surface arbitrage, and hosts a community-curated directory of prediction-market tools.
ArbiTrade Pro
ArbitrageWeb-based automated arbitrage platform for prediction markets. Scans for price inefficiencies across correlated and cross-platform markets and manages the trades to capture the spread.
Precedence
Platforms & ToolsAI trading terminal for Polymarket. Estimates true probabilities, detects mispricing and shows where the edge is across thousands of markets — with gasless Smart Wallet execution on Polymarket's order book and UMA-verified settlement.
Probsee
Platforms & ToolsProbability and odds analytics for prediction markets. Probsee surfaces implied probabilities and market data to help Polymarket traders read the odds and spot mispriced markets.
Markium Pro
Platforms & ToolsData analytics and trading platform for prediction markets. Aggregates markets across Polymarket and beyond, then layers on wallet analytics, trader leaderboards and watchlist alerts so you can track the smart money and spot mispriced markets in one place.
Alphascope
Platforms & ToolsAI research workspace for prediction markets across Polymarket, Kalshi, Manifold and Opinion. Generates AI probability forecasts, ranks breaking news by market impact, charts real-time probabilities with news markers and flags cross-platform arbitrage — all from one dashboard.
Rainmaker
ArbitrageAI-agent terminal that unifies arbitrage, copy-trading and analytics across Polymarket, Kalshi and Novig. Its Cloud9 agents snipe arbitrage between venues, score and replicate winning traders, and mine analytics — with a focus on sports markets (NFL, NBA, NCAA).
PolyEdge
Platforms & ToolsScanner that finds mispriced Polymarket markets by comparing live order-book prices against objective data. Weather Edge pits meteorological forecasts against prices, Sports contrasts bookmaker odds, and you can upload your own probabilities for quarter-Kelly bet sizing with a 5% portfolio cap.
Prediction Pilot
Platforms & ToolsAI assistant for prediction-market research and monitoring. Ask questions in plain English, scan Kalshi's order books live, backtest ideas on 90 days of settled data, monitor open positions with real-time P&L, and get scheduled alerts — plus cross-platform arbitrage detection between Kalshi and Polymarket.
PredictPM
Sentiment / NewsReal-time social and market monitoring for prediction markets. Tracks tweets with ~2-second alert latency, monitors equivalent markets across Polymarket and Kalshi at once, and runs AI signal intelligence over tweet and market data to surface structured, strategic insights.
Line Check
ArbitrageOdds-comparison tool that pits Polymarket against SX Bet side by side. Shows American, decimal and implied-probability formats, highlights the best-edge opportunity and optimal payout, and lets you size a custom bet across NBA, MLB, NHL, UFC and major soccer leagues.
Poly Helper
Platforms & ToolsBrowser extension that upgrades Polymarket without leaving its interface — 25+ context panels: live crypto and stock stats, sports intel with live scores, bookmaker odds comparison across 19 sportsbooks with automatic edge detection, polls vs market price on election events, top-holders PnL, a tracker to follow top traders, breaking-news X feed, LP-rewards calculator and TradingView-style charts. Polymarket Builders Badge — supported and approved by Polymarket.
Predict & Profit
Weather MarketsAutomated Python trading system for Kalshi weather and inflation markets that hunts mispriced binary contracts. The weather bot polls a 164-member forecast ensemble (GFS, AIGEFS, ECMWF IFS, AIFS-ENS) across 15 US cities and only trades when 3 of 4 model families agree; the included inflation bot trades CPI/PCE contracts when its 5-source nowcast stack diverges from the Cleveland Fed by 0.15pp+. Kelly sizing, daily loss limits, public track record — full source code, no subscriptions.
How arbitrage bots work on Polymarket
An arbitrage bot hunts for prices that disagree: YES and NO shares on the same market summing to less than $1, the same event listed on two venues at different odds, or a multi-outcome market whose probabilities add up past 100%. When it finds one, it buys both sides and locks in the difference regardless of how the event resolves.
On Polymarket that means watching the order book over WebSockets and racing to capture gaps before other bots close them. Individual edges are usually a few cents per share, so returns come from volume and speed rather than any single big win — which is why arbitrage bots run around the clock.
What to look for in an arbitrage bot
Speed and fee math decide everything: a 2-cent edge disappears into slippage if the bot executes slowly, and into fees if the pricing model ignores them. Favor bots with direct CLOB integration, explicit partial-fill handling and published reaction times. Cross-venue arbitrage additionally requires capital parked on both venues and rules for what happens when one venue resolves a market differently — read that part of the strategy before funding it.
Frequently asked questions
- Is arbitrage on Polymarket really risk-free?
- Nearly, but not quite. Legs can fill partially, the price can move between your two fills, and a cross-venue pair can be stuck if the venues resolve differently or at different times. Good bots manage these execution risks; nothing eliminates them entirely.
- How much does a single arbitrage trade make?
- Typically a few cents per share after fees. The strategy compounds through frequency — hundreds of small, near-riskless captures — which is why speed and uptime matter more than any one opportunity.
- Do arbitrage opportunities still exist on Polymarket?
- Yes. New markets, breaking news and thin order books create mispricings every day. But competition is real: the fastest, lowest-fee bots capture most of them, so an arbitrage bot's edge is engineering, not the idea itself.