Flashnet vs Relay for swaps
For swaps across chains. Checked October 27, 2026.
The short answer
Choose Flashnet if your wallet swaps into or out of Lightning or Zcash, wants a quoted price that holds for 2 minutes, or wants Bitcoin credited before confirmation.
Choose Relay if you want its published swap fees, exact-output quotes on more routes, its SDK and widget, or chains beyond Flashnet's.
How each works
Flashnet
Users send to the address on a quote, or to their own permanent address, and Flashnet settles on the destination network, filling from onchain liquidity and its own markets. It holds no user balances; its settlement workers run in AWS Nitro enclaves whose identity integrators can verify.
Relay
Users deposit into Relay's depository on the origin chain. A solver fills the order on the destination chain with its own capital and is repaid from the depository once Relay verifies the fill.
Side by side
Each fact links to the page it came from.
| Flashnet | Relay | |
|---|---|---|
| Orders | ||
| Swap with a plain transfer | YesEvery quote returns a deposit address; paying it creates the order. No wallet connection, approval or contract call.Source | YesA quote can return a deposit address instead of a transaction to sign.Source |
| Firm quotes | YesA quote's price holds for 2 minutes within your slippage. Fixed-output quotes commit to the amount out.Source | NoQuotes are re-priced when filled, with a minimum-output guard. No stated validity window.Source |
| Exact-output quotes | PartlyInto Lightning from most assets, and from Lightning into most. Fixed-output quotes, for approved partners, commit to the amount out.Source | YesEXACT_OUTPUT delivers exactly the amount asked, or fails and refunds on the origin chain.Source |
| Any token by address | YesAny SPL or ERC-20 token by address, in or out, on Solana and EVM chains, routed through a stablecoin on its own chain.Source | YesTokens with solver or DEX liquidity on most chains; Bitcoin, Tron, TON and XRP take listed tokens only.Source |
| Same-chain swaps | YesSuch as USDC into BONK on Solana, priced against Jupiter on Solana and DEX venues on EVM chains.Source | YesThrough the same quote API, by DEX meta-aggregation on the source chain.Source |
| Automatic refunds | YesOrders that can't fill within the quote's bounds go back to the refund address you set.Source | YesRefunds go to the refundTo address on the origin chain, less gas. Without one, there's no automatic refund.Source |
| Networks | ||
| Bitcoin | YesNative BTC on Bitcoin L1, in and out.Source | YesNative BTC, by wallet signature or deposit address.Source |
| Lightning | YesIn and out over Lightning, including BOLT11 invoices and Lightning addresses.Source | NoNot among the chains in Relay's API.Source |
| Bitcoin credited before confirmation | YesEligible deposits can be credited before the first confirmation, for a fee. Otherwise after 1 confirmation.Source | NoProcessed after 1 confirmation, or 2 for high-value deposits.Source |
| Hyperliquid (HyperCore) | YesUSDC and USDe delivered to HyperCore.Source | YesPerps and spot USDC, and other spot tokens.Source |
| Solana | YesSOL, USDC, USDT and other SPL tokens.Source | YesIncluding deposit addresses.Source |
| Tron | YesTRX and USDT.Source | YesListed in Relay's chains API.Source |
| XRP | YesXRP.Source | YesListed in Relay's chains API.Source |
| Zcash | YesZEC.Source | NoNot among the chains in Relay's API.Source |
| Operations | ||
| Your own fee on every order | YesSet a fee per order or per affiliate, from 1 to 9,999 bps, and claim it on the chain and asset you choose.Source | YesApp fees in bps, accrued in USDC and claimable to an EVM address.Source |
| Sanctions and AML screening | YesSource and destination addresses checked with Elliptic and other providers on every order.Source | YesWallets screened when an order fills; sanctioned addresses and currencies rejected.Source |
| Webhooks | YesWebhooks, plus a server-sent event stream of order status.Source | YesWebhooks and a websocket status stream.Source |
| Platform fee | Set per partner and route, and itemized on every quote.Source | 0% on same-token bridges; 0.01% on stablecoin, 0.06% on major-token and 0.15% on other swaps, plus gas.Source |
| Support | 24/7, with direct access to the engineers who run settlement. | Support center with live chat and email. No published SLA.Source |
Where Flashnet wins
What wallets running swaps run into with Relay:
- No Lightning or Zcash.
- Quotes are re-priced at fill, with no stated window in which the price holds.
- Bitcoin swaps wait for a confirmation, two for large amounts.
Where Relay is strong
- Published swap fees: 0.01% on stablecoins, 0.06% on major tokens and 0.15% on others.
- Exact-output swaps that deliver exactly the amount asked, or refund on the origin chain.
- A mature SDK, React hooks, a drop-in widget, webhooks and a websocket stream.
Weighing more than two? See Relay alternatives for swaps or every provider side by side. Comparing deposits? See Flashnet vs Relay for deposits.
Questions
What does Relay charge for swaps?
Relay publishes its fees: 0.01% on stablecoin swaps, 0.06% on major-token swaps and 0.15% on others, plus gas, and nothing on same-token bridges. Flashnet sets its platform fee per partner and route and itemizes it on every quote. Both let you add your own fee to every swap.
Can Relay swap into or out of Lightning?
No. Lightning isn't among the chains in Relay's API. Flashnet swaps into and out of Lightning, including paying BOLT11 invoices, as well as native Bitcoin L1.
Are Relay swap quotes firm?
Relay re-prices a quote when it fills and protects the user with a minimum output; its docs state no window in which the price holds. A Flashnet quote's price holds for 2 minutes within your slippage, and fixed-output quotes commit to the amount out.