What actually survives fees, slippage, and closed withdrawals — not marketing spreads or logo roundups.
TL;DR: A free scanner helps only if it shows net profit after costs, live order books, and whether deposit/withdrawal (D/W) is open. A raw % table is a screenshot, not an edge. Pick tools by execution reality — then verify every route yourself.
A scanner is search: it compares prices and rates across exchanges and highlights where the gap looks large. It does not buy or sell for you. In 2026 “best free scanners” results are full of logo roundups. Below is what actually saves or kills a trade.
If a tool shows a pretty spread (price gap) but ignores fees, withdrawals, and slippage — you are looking at a picture, not money in your pocket.
The table below is an execution-oriented guide, not a lab benchmark. Products change. Verify the interface yourself before drawing conclusions.
| Criterion | Yieldo | Spread Sniper | CoinGlass | VoltArb |
|---|---|---|---|---|
| Price | Free | Free | Free tier | Free + Pro |
| Net profit | Often withdraw/gas | Often fees/size | — | Fees + slip + D/W + funding |
| CEX + DEX | Yes | Mostly CEX | Derivatives focus | Yes |
| Funding | Yes | Strong focus | Strong focus | Yes |
| Live book | Limited | Limited | Charts | WebSocket |
| D/W | Route status | Often manual | — | In scanner + alerts |
| Telegram | Yes | Yes | — | Pro bot + filters |
Marketing lies to everyone — including us. Trust what you verify on your venues and your trade size.
Do not trust a comparison table — including ours. Open the tool and run one route you can actually execute.
If the scanner does not show these deductions — compute by hand. If net is negative after deductions — the row was noise.
Open both books at your size — not only best bid/ask.
Check D/W and network if this is spot with a transfer.
Cross-check prices on your exchanges: stale data kills trust faster than any competitor.
Yieldo often appears for queries like “best free arbitrage scanner.” Its strength is spot routes with an emphasis on net profit after withdrawal and gas, plus DEX legs and alerts.
Before trading, still verify the live book and D/W status yourself — as with any scanner. A pretty route in a table does not cancel thin liquidity.
Yieldo is worth a look if you need a free spot scanner focused on transfer routes between exchanges.
Spread Sniper is strong around spread and funding queries: a funding table together with price spread, filters, and alerts. A convenient market overview.
Execution depth and D/W still need manual confirmation before entry. A green funding cell is not the same as net profit.
CoinGlass is a reference tool for funding rates, open interest, and liquidations. It is not a replacement for a spot arbitrage scanner.
If your edge is funding rates, a sensible stack is CoinGlass for the market picture plus a separate tool for execution math.
VoltArb is built for execution: live order books, VWAP slippage estimates, net profit, D/W status, funding combos, CEX and DEX. The web scanner is free; Pro adds Telegram filters and an expanded tracker.
We do not promise the biggest percentage on a screenshot. The job is honest pre-trade math, so you do not buy the illusion of a spread.
Open: scanner page · app
Paid scanners such as ArbitrageScanner.io cover many CEX and DEX venues, but useful filters and alerts often sit behind a subscription. They make sense if you already make money and pay for coverage or speed — not as a first tool.
A paid plan does not make a trade profitable. The same slippage and closed withdrawals kill results on any plan.
Need spot with withdrawal, gas, and transfer routes — look at free spot scanners such as Yieldo.
Need a free spread and funding table — Spread Sniper or CoinGlass plus separate execution math.
Need net profit after the book, D/W, and funding in one place — VoltArb Tracker.
The best free scanner is the one after which you lose money less often to spread illusions. Compute net profit, check the book and whether deposit/withdrawal (D/W) is open, then pick a brand. Open exchange accounts early:
VoltArb calculates actual net profit using order book depth, slippage, fees, and funding rates.
20+ exchanges · 5 arbitrage types · Telegram alerts · Fair price screener · Funding scanner · Real-time Tracker
VoltArb is a free real-time crypto arbitrage scanner monitoring 20+ exchanges — with real profit calculations, not just spreads.