Free Arbitrage Betting Software: 7 Free Arb Finders Compared (2026)

The best free arbitrage betting software in 2026 is a free plan on a paid scanner. Surebet shows arbs up to 1% for free, OddsShopper up to 2%, BetBurger runs a limited, delayed free version, Odds Assist and Oddspedia list arbs after a free sign-up, and OddsFantasy gives every free account a live preview of its arbitrage feed and a free arbitrage calculator.

Key numbers: what free arb finders leave out

• OddsFantasy's arbitrage feed listed 5,599 distinct pre-match arbs across 590 matches in the 24 hours to 21 October 2026, 12:00 UTC.
• The median arb returned 0.64% of total stake.
• 31.8% returned more than 1%, so a free plan capped at 1% hides almost a third of them. 11.2% returned more than 2%, and 2.1% more than 5%.
• 39% of arb listings were gone within 5 minutes, and the median listing lasted 9.4 minutes, so a free feed that runs on a delay misses many of them.

Free tools are a good way to learn arbing and to see whether it suits you. They are not built to catch the best arbs: the bigger and faster ones are exactly what caps, delays and locked bookmakers hold back for paying users.

Free arbitrage betting tools compared

1. OddsFantasy

Every OddsFantasy account starts free. The free plan includes a live preview of the pre-match arbitrage feed: the newest arbs are shown in full, and the pick is hidden on the best ones. The feed compares 50+ bookmakers across the US, Europe, Asia and Africa, including sharp books, betting exchanges and the Polymarket and Kalshi prediction markets, with fees and commissions taken off before two prices are compared. The free plan also includes the arbitrage calculator, every other betting calculator and the 28-lesson course. The full feed comes with Classic: $80 for 30 days, paid once with no subscription (pricing). Best for: arbs that include prediction markets and exchanges.

2. Surebet

Surebet's free plan costs €0 and shows surebets up to 1% profit, 10 similar bets a day and 2 filters, without auto-update. Basic costs €29.90 a month and Max €59.90 a month (Surebet plans). Best for: learning with real arbs at no cost.

3. OddsShopper

OddsShopper's free tier includes line shopping, its odds screen, no-vig pricing and a capped arbitrage finder that shows arbs up to 2% ROI (OddsShopper). Its finder scans 110+ sportsbooks across 40+ leagues; the full pre-game arb feed is on Core and live arbs are on Pro (OddsShopper arbitrage finder). Best for: US bettors who also want a free odds screen.

4. BetBurger

BetBurger offers a free version it calls "free forever", covering prematch and live surebets and value bets, with "some limits and delays" and no credit card required. Paid prematch access costs €79.99 for 30 days (BetBurger pricing). Best for: seeing what a large scanner finds before paying.

5. Odds Assist

Odds Assist runs a free arbitrage finder: some arbs are visible straight away and a free sign-up shows more. Its sportsbook filter lists 23 US books, including Pinnacle, Novig, ProphetX, Polymarket and Kalshi (Odds Assist). Best for: US sportsbooks and prediction markets.

6. Oddspedia

Oddspedia's sure bets page is free. You can filter by profit percentage, sport, market type and bookmaker, it covers two-way and three-way markets, and a built-in calculator splits your stake (Oddspedia). Best for: a quick check with bookmakers that accept players from your country.

7. SignalOdds

SignalOdds lists sure bets for free with the event, market and profit percentage, but the bookmakers and stake split are for Sure Bets subscribers, at a $24.99 a month welcome price. It flags ageing odds and shows profit before exchange fees (SignalOdds). Best for: seeing where arbs appear before you pay.

What free arb finders hold back

• Profit caps. A 1% cap hid 31.8% of the arbs in our feed and a 2% cap hid 11.2%.
• Delays. A delayed feed shows arbs after many have gone: 39% of our arb listings lasted under 5 minutes.
• Locked details. Some free lists show the profit but not the bookmakers or the stakes.
• Fewer filters and no auto-update, so you refresh by hand and sort through markets you can't bet.
• Fees. An arb with an exchange or prediction-market leg can disappear once commission or taker fees are paid. Check whether the tool counts them; OddsFantasy takes them off before comparing.

Free arbitrage calculators

A calculator doesn't find arbs; it splits your stake once you have one. Free options include the OddsFantasy arbitrage calculator, Pinnacle's arbitrage calculator and RotoWire's free arbitrage calculator. Odds of 2.10 and 2.05 imply 47.62% + 48.78% = 96.40%, so $49.40 and $50.60 return $103.73 either way, a 3.73% arb.

How OddsFantasy finds arbs

1. Collect live odds from 50+ bookmakers: sportsbooks, sharp books, betting exchanges and prediction markets.
2. Convert every price into what it actually pays: exchange odds lose their commission, and a Polymarket or Kalshi price becomes odds of 1 ÷ (price + taker fee).
3. Compare only identical markets: the same line, the same period and kickoff times that agree within two hours.
4. List an arb when the implied probabilities of every outcome add up to less than 100%, and time it from first seen to gone.

When to pay for an arb finder

Stay on free plans while you learn the method, open accounts and test how your bookmakers treat arb bets. Pay once you place arbs every day: that's when the arbs above the free caps, and the minutes a delay costs you, start to add up. OddsFantasy's plans are one-time 30-day payments, so you can try a month of the full feed without a subscription. For paid tools and prices, see best arbitrage betting software.

How we measured this

Every arb that enters the OddsFantasy feed is logged with when it was first seen and when it disappeared. This article covers pre-match arbs first seen between 20 October 2026 12:00 UTC and 21 October 2026 12:00 UTC. A distinct arb is one match, market, set of selections and pair of bookmakers, however often it was relisted; returns are on total stake after fees and commission. Competitors' free plans come from their own pages on 21 October 2026 and change often.

Arbitrage has practical risks no tool removes: bookmakers limit accounts that bet arbs, a price can move between your two bets, and books settle some markets under different rules. Read our arbitrage betting guide before you scale up, and trade responsibly: stake only what you can afford to lose.