How to Find Arbitrage Bets: Tools & Strategies

If you have ever tried to find arbitrage bets by manually comparing odds across bookmakers, you already know the problem: by the time you open the second tab, the line has moved. Arbitrage betting (locking in guaranteed profit by backing all outcomes at prices that sum to less than 100%) only works when you can detect and act on mispricings before the market corrects. That window is typically between 2 and 60 seconds. Humans are not fast enough. Software is.

This guide covers everything you need to know about how to find arbitrage bets in 2026: the types of tools available, what actually matters in arbitrage betting software, the latency problem most people ignore, and a concrete step-by-step approach to getting started. If you are new to the concept itself, start with our primer on what sports arbitrage betting is and how it works.

Why You Cannot Find Arbs Manually

The math behind arbitrage is simple. If Sportsbook A offers Team X at 2.10 and Sportsbook B offers Team Y at 2.10, the implied probabilities are 47.6% + 47.6% = 95.2%. You can bet both sides and guarantee a 4.8% return regardless of outcome. The hard part is not the math. It is finding these opportunities before they disappear.

A typical sharp sportsbook adjusts lines within 1-5 seconds of a major price move. Soft books follow within 10-30 seconds. That entire lifecycle (the arb appearing, being exploitable, and vanishing) often plays out in under a minute. Meanwhile, manually checking odds requires opening multiple sites, navigating to the same market, comparing numbers, and placing bets on two different platforms. That takes 2-3 minutes at minimum, assuming you do not make a mistake.

This is why every serious arbitrage bettor uses an arb finder, software that continuously monitors odds across multiple venues and alerts you (or acts automatically) when a sure bet appears.

Types of Arbitrage Betting Software

Not all arb finding tools work the same way. Understanding the categories helps you choose the right one for your situation.

Arb Scanners (Sure Bet Finders)

The most common type. An arb scanner polls odds from multiple bookmakers via APIs or web scraping, compares them in real time, and displays a list of current arbitrage opportunities. You still place the bets manually, but the detection is automated. Popular examples include OddsJam, BetBurger, and RebelBetting. You can see a working example on our free live prediction market scanner, which streams real cross-venue arbs as they appear.

The advantage is simplicity: you see a list of arbs, click through, place your bets. The disadvantage is speed. By the time you see the arb on screen, navigate to both sportsbooks, and place the bets, the opportunity may be gone. Scanner-based approaches work best for pre-match arbs where lines are more stable and windows last longer (minutes rather than seconds). For live in-play arbitrage, where windows close in seconds, scanners alone are not enough.

Arb Alert Systems

A step up from passive scanners. Alert-based tools push notifications (desktop, mobile, Telegram, Discord) the instant an arb is detected. Some include one-click links that take you directly to the bet slip on each sportsbook. This shaves seconds off your reaction time, but you are still limited by how fast you can manually execute two bets.

Automated Arb Bots

The highest tier of arbitrage betting software. Fully automated systems detect the arb and execute both legs programmatically, without human intervention. Detection-to-execution can happen in under 100 milliseconds. These tools require API access to the venues (or headless browser automation) and are significantly more complex to build and maintain. But they capture arbs that no manual bettor could.

What to Look for in Arb Software

Whether you are evaluating a sure bet finder or building your own system, three factors dominate everything else.

Speed and Latency

This is the single most important factor. An arb finder that detects opportunities 500ms faster than another will capture significantly more profitable trades. Latency breaks down into three stages:

Data ingestion latency: How fast the software receives price updates from each venue.
Computation latency: How fast it identifies an arb from the raw price data.
Execution latency: How fast it places orders (if automated) or alerts you (if manual).

Most commercial arb scanners have total pipeline latency of 1-5 seconds. That is fine for pre-match markets with stable lines. For live betting or fast-moving prediction markets, you need sub-second total latency.

Venue Coverage

More venues means more potential arb pairs. But coverage is not just about the number of sportsbooks. It is about the types of venues. The most profitable arbs tend to occur between venues that price differently by design: sharp sportsbooks vs. soft books, or traditional sportsbooks vs. prediction markets. A tool that covers Pinnacle + Kalshi + Polymarket opens up arb types that a tool covering only traditional sportsbooks cannot see. We explore this in depth in our comparison of Kalshi vs. Polymarket arbitrage.

Automation Depth

Some tools only detect. Some detect and alert. Some detect, calculate stake sizing, execute both legs, and manage risk automatically. The deeper the automation, the more arbs you can capture per day and the less time you spend manually clicking through bet slips. Consider whether the tool supports paper trading (simulated execution) so you can validate performance before risking real capital.

The Latency Problem: Odds APIs vs. Direct Monitoring

Here is where most arb finders fall short, and where understanding the technical plumbing makes a real difference.

The majority of arbitrage betting software tools get their odds data from third-party odds aggregation APIs. Services like The Odds API, OddsAPI, or proprietary scrapers poll sportsbook websites every few seconds and serve the data to subscribers. This introduces inherent latency:

Data Source Method	Typical Latency	Use Case
Third-party odds API	2,000 - 10,000ms	Casual arb scanning, pre-match
Direct REST API polling	200 - 2,000ms	Faster detection, some live arbs
WebSocket feeds	10 - 100ms	Real-time live arbs
DOM MutationObserver (headless browser)	15 - 30ms	Venues with no API, fastest possible

If you are using a tool that relies on a third-party odds API with 2-5 second refresh intervals, you are seeing odds that are already 2-5 seconds stale. In a market that corrects in 10 seconds, you have already lost half your window before detection even begins. This is why most users of basic arb scanners report that "the arbs are gone by the time I try to bet." They are not imagining it. Their data is simply too slow.

The solution is direct venue connections. WebSocket feeds from exchanges like Kalshi and Polymarket push price updates to your software the instant they happen, with latency measured in milliseconds, not seconds. For sportsbooks that do not offer WebSocket APIs (which is most of them), the next best approach is direct REST polling at high frequency (every 200ms) or, for browser-based platforms, running a headless browser with a MutationObserver that fires within 20ms of any DOM change on the page.

How Claw Arbs Finds Arbitrage Bets

Claw Arbs was built specifically to solve the latency problem. Instead of relying on third-party odds aggregators, it connects directly to each venue using the fastest available method:

Kalshi: Direct WebSocket connection to the exchange, receiving orderbook deltas and ticker updates in real time.
Polymarket: WebSocket connection to the CLOB (Central Limit Order Book) on Polygon L2, with live orderbook depth.
Pinnacle (PS3838): REST delta-polling every 200ms, capturing line movements within a fraction of a second.
BetInAsia: Headless Playwright browser with a MutationObserver that flushes odds changes every 20ms, plus a full DOM scrape every 30 seconds as a safety net.

All price data flows into a central in-memory price cache. When any venue updates, the system cascades notifications to three independent arb engines: a cross-venue engine for Kalshi-vs-Polymarket arbs, a cross-book engine for sharp-vs-soft arbs (Pinnacle/BIA against Kalshi/Poly), and a bracket arb engine for intra-market mispricings. Detection-to-signal latency is typically under 25ms.

The cross-book engine runs a 14-step pipeline on every price update, checking kill switches, edge thresholds, depth requirements, cooldowns, and risk limits before executing. When both engines agree on an opportunity, execution happens programmatically. Leg one fires, then leg two hedges immediately. If a hedge fails, the system marks the position as naked and halts further trading on that match until the exposure is resolved.

Step by Step: How to Start Finding Arbs

Whether you build your own system or use existing arbitrage betting software, here is the practical path to getting started.

Step 1: Open Accounts on the Right Venues

You need accounts on at least two venues with meaningfully different odds. More accounts means more opportunities. Prioritize a mix of sharp and soft books (explained below), and include at least one prediction market. Fund each account with enough to place meaningful bets. $500-$1,000 per venue is a reasonable starting point.

Step 2: Choose Your Arb Finder

If you are just getting started and want to learn the mechanics, a scanner like OddsJam or BetBurger is fine for pre-match arbs. If you want to capture more opportunities (including live markets), you need a tool with direct venue connections and sub-second latency. If you want full automation, you need a system like Claw Arbs that handles detection, sizing, and execution.

Step 3: Start with Paper Trading

Before risking real money, run your arb finder in paper trading mode. Track every opportunity it detects, simulate execution, and measure your theoretical P&L. This reveals whether the edges are real or phantom (caused by stale data), and helps you calibrate stake sizes and edge thresholds.

Step 4: Execute Small and Scale Up

Start with small stakes ($10-$50 per leg) to validate that real execution matches your paper results. Pay attention to fill rates. Not every bet will execute at the displayed price. Account for fees, slippage, and the occasional naked leg where one side fills and the other does not.

Step 5: Monitor, Adjust, Repeat

Track your results religiously. Measure hit rate, average edge, execution speed, and P&L per venue pair. Adjust your minimum edge threshold based on real data. Most arbers find that a minimum edge of 1.5-3% (after fees) is the sweet spot. Below that, slippage eats the profit; above that, opportunities are too rare.

Which Sportsbooks Are Best for Arbitrage?

Not all sportsbooks are created equal for arb betting. The key distinction is between sharp books and soft books.

Sharp Sportsbooks

Sharp books like Pinnacle (PS3838), CRIS, and Circa accept high limits, do not ban winning players, and offer the tightest lines in the market. Their odds reflect the true market consensus. You typically use sharp books as your reference price, the "true" probability of an outcome.

Soft Sportsbooks

Soft books like DraftKings, FanDuel, BetMGM, and most retail sportsbooks offer wider margins, slower line movements, and promotional odds (boosts). They are slower to adjust their lines when the market moves, creating windows where their odds are out of date relative to the sharp market. This is where arbs live. The tradeoff: soft books actively limit or ban accounts that win consistently. Account longevity is a real concern.

The Best Setup

The most effective arb configuration uses sharp books as your price signal and soft books (or prediction markets) as your execution venue. When Pinnacle moves a line and DraftKings has not caught up yet, that is your window. When sharp sportsbook odds diverge from Kalshi or Polymarket prices, that is another window entirely, and often a wider one.

Prediction Markets as Arb Venues

This is where the biggest untapped edge in 2026 arb betting lives. Prediction markets like Kalshi and Polymarket regularly misprice events relative to traditional sportsbooks, for several reasons:

Different participant pools. Prediction markets attract retail traders and political bettors, not sharp sports bettors. This creates structural inefficiencies.
Different market structures. Kalshi uses binary contracts priced in cents (0-99). Polymarket uses an on-chain CLOB with USDC. Neither naturally aligns with decimal sportsbook odds, making cross-venue price comparison non-obvious to casual participants. Use an odds converter to translate between formats.
Thinner liquidity. Many prediction market events have less orderbook depth than sportsbooks, so prices can deviate further from "true" value before being corrected.
Cross-venue latency. Most arbers do not even look at prediction markets. The tools they use do not cover them. This means mispricings persist longer.

For a deeper comparison of the two approaches, see our guide on value betting vs. arbitrage betting. Arbing across prediction markets and sportsbooks is a distinct strategy that combines the mathematical certainty of arbitrage with the structural inefficiency of fragmented markets.

Managing Multiple Accounts

Arb betting requires balances spread across multiple venues. This introduces operational complexity that most beginners underestimate.

Fund distribution: Keep enough balance on each venue to execute both legs of an arb without delay. If you see an arb but need to deposit funds first, it will be gone. Aim for roughly equal balances across your primary venues.
Rebalancing: Over time, your winning venue will accumulate balance while your losing venue will deplete. Regularly withdraw from the winning side and deposit to the losing side. With sportsbooks this can take days; with prediction markets on crypto rails, it can happen in minutes.
Account health: Soft sportsbooks will limit your account if you consistently beat the closing line. Strategies to extend account life include: rounding stakes to natural-looking amounts, mixing arb bets with recreational bets, avoiding minimum-edge arbs that scream "bot," and using multiple accounts where legally permitted.
Record keeping: Track every bet, every deposit, every withdrawal. You need to know your true P&L across all venues at any given moment. Without it, you cannot tell if you are actually profitable after accounting for funds locked in transit, pending settlements, and fees.

Common Pitfalls and How to Avoid Them

Stale Odds / Phantom Arbs

The number one trap. Your arb scanner shows a 3% edge, but by the time you click, the odds have changed. This happens when your data source is too slow. Solution: use tools with direct venue connections and build in a staleness check. Reject any opportunity where the price data is more than 2 seconds old.

Naked Legs

You place leg one and it fills, but leg two gets rejected or the odds have moved. Now you have an unhedged position. This is the primary risk in arb betting. Solution: always execute the less liquid side first (the side more likely to reject), keep stakes small enough that a naked leg does not blow up your bankroll, and use software that automatically tracks and manages naked exposure.

Ignoring Fees and Slippage

A 2% arb looks profitable until you account for the 7% Kalshi fee tier, Polymarket gas costs, and 0.5% slippage on each side. Always calculate your edge net of all costs. Most beginners use gross edge and wonder why they are losing money. Your arbitrage betting software should account for venue-specific fee structures in its edge calculation. Use our arbitrage betting calculator to verify whether an opportunity is truly profitable after fees.

Over-Concentration on One Venue Pair

If you only arb between two venues, your sample size is small and you are exposed to correlated risk (both venues change their policies, one goes down, etc.). Diversify across multiple venue pairs. The best arbers monitor 4-6 venues simultaneously.

Neglecting Bankroll Management

Even with guaranteed profit on each individual arb, poor bankroll management can sink you. Do not stake more than 5% of your total bankroll on a single arb. Account for the possibility of naked legs and settlement delays. Keep a reserve for rebalancing.

The Bottom Line

Finding arbitrage bets in 2026 is a technology problem. The mathematical concept is simple: bet all sides at prices that guarantee profit. The execution requires fast data, smart software, and disciplined operations. Manual arb finding is effectively dead for anything other than pre-match markets with stable lines. If you are serious about arb betting, you need an automated sure bet finder with direct venue connections, sub-second latency, and real-time risk management.

The venues that offer the most untapped edge right now are prediction markets, Kalshi and Polymarket, crossed against sharp sportsbooks like Pinnacle. Most arbers are not looking there yet, which means the opportunities are larger and last longer. That window will not stay open forever. For a detailed comparison of arb detection and execution platforms, see our guide to the best arbitrage betting software in 2026.

How to Find Arbitrage Bets: Tools, Software & Strategies