Across vs. SwapKit
Rift Research
Last updated
TLDR: Across is an intent-based interoperability protocol. SwapKit is a native cross-chain aggregator. Consider Across when you are moving canonical USDC or ETH between major chains and care about speed. Consider SwapKit when you want one interface over several native cross-chain protocols. Confirm the live winner on rates.gg.
What each protocol is
Across. Across is an intents protocol for bridging and cross-chain swaps. Relayers front destination liquidity. Across advertises approximately two-second fills on supported mainnet routes; actual timing depends on the route. Its intent settlement and refund mechanisms are separate from that initial fill. Official docs: Across Docs. App: across.to.
SwapKit. SwapKit aggregates native cross-chain protocols (THORChain, Chainflip, Mayan, Garden, NEAR Intents and others) plus same-chain DEX routing, behind one API and SDK. Official docs: SwapKit Docs. App: swapkit.dev.
Short version
| Dimension | Across | SwapKit |
|---|---|---|
| Role | Intent-based interoperability protocol | Native cross-chain aggregator |
| Fee | Market-quoted relayer spread and LP fee; no separate flat protocol toll | SwapKit fee band of 0.15% / 0.12% / 0.10% by size, 0.01% stable-to-stable, plus the underlying venue fee |
| Coverage | Supported mainnet networks, with availability determined by the exact token pair and route | 20+ chains including Bitcoin, Ethereum, BNB Chain and Solana via connected providers |
| Settlement | Canonical assets delivered by bonded relayers | Native via the winning provider |
| Trust model | Relayer-funded fills and the settlement and dispute mechanisms of the deployed Across contracts | Inherits each connected protocol (THORChain, Chainflip, Mayan, Garden, NEAR Intents, and others) |
| Good fit for | Canonical USDC and ETH transfers between supported chains | One interface over several native cross-chain protocols |
| Docs | Across Docs | SwapKit Docs |
Where each fits
Across may fit when:
- You are moving USDC or ETH between major supported chains
- Fast destination fills matter; confirm the estimate for your route
- You want a dedicated intent rail rather than a meta-aggregator
SwapKit may fit when:
- You want THORChain, Chainflip, Garden, Mayan and NEAR Intents behind one quote
- Native settlement is a hard requirement
- You are integrating a widget or Partner API rather than a single venue
Key differences
Across and SwapKit should be compared on the job you need to complete: the input asset, destination asset and chain, trade size, execution method and custody assumptions. They may overlap on some routes and complement each other on others. A broader chain list or faster advertised fill does not establish a better net rate. Compare executable quotes in the same window, including gas and every underlying step.
When to use which
- Use Across when you are moving canonical USDC or ETH between major chains and care about speed.
- Use SwapKit when you want one interface over several native cross-chain protocols.
- If both can quote the same route, take the better net output after fees, time and settlement type. Check that print on rates.gg.
FAQ
Which is cheaper, Across or SwapKit?
Neither has a universal price advantage. Across: Market-quoted relayer spread and LP fee; no separate flat protocol toll. SwapKit: SwapKit fee band of 0.15% / 0.12% / 0.10% by size, 0.01% stable-to-stable, plus the underlying venue fee. Compare executable quotes for the same size, destination and time window, including gas, underlying venue costs and any extra transfer. Expected output and minimum received are different figures; compare like with like.
Is Across a substitute for SwapKit?
Only on overlapping pairs and chains. When both can quote the same route, take the better net output after fees and time. When only one supports the asset or chain, that one is the only option.
Where are the official Across and SwapKit docs?
Across: Across Docs. SwapKit: SwapKit Docs. Live rate comparison: rates.gg.
Official sources
- Across docs: Across Docs
- Across app: across.to
- Across — Introduction: docs.across.to/introduction
- Across — Features and fill times: docs.across.to/introduction/features
- Across — API reference: docs.across.to/api-reference
- SwapKit docs: SwapKit Docs
- SwapKit app: swapkit.dev
- SwapKit — API introduction and fees: docs.swapkit.dev/swapkit-api/introduction
- SwapKit — Swap types and providers: docs.swapkit.dev/swapkit-api/swap-types
Get the Best of Both With Rift
Rift is a strong alternative to choosing between Across and SwapKit. It brings routes from both together with additional venues on supported pairs, comparing available quotes to find the best net execution for your order. You get the strengths of both through one API.
Rift adds no router fee and uses secure hardware enclaves to enforce noncustodial execution. Underlying venue fees, spreads and network costs still apply, and availability depends on the asset, chain and order size. The live quote shows the route and expected output.