Across vs. Uniswap

TLDR: Across is an intent-based interoperability protocol. Uniswap is an on-chain AMM protocol. Consider Across when you are moving canonical USDC or ETH between major chains and care about speed. Consider Uniswap when you want on-chain swaps and liquidity on a single chain. 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.

Uniswap. Uniswap is a peer-to-peer AMM protocol on Ethereum and deployed L2s. Versions 2–4 are persistent smart contracts. Most volume is same-chain. The web interface is separate from the protocol and can add its own behaviour. Official docs: Uniswap Docs. App: app.uniswap.org.

Short version

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

Uniswap may fit when:

• The trade is same-chain against Uniswap pool liquidity
• You want to provide or take AMM liquidity directly

Key differences

Uniswap provides AMM liquidity on supported chains. Across may overlap with its swap use case, route through that liquidity, or handle another leg of a cross-chain order. The answer depends on the selected product and route. Compare the complete trade to the same destination, including any bridge and gas costs.

When to use which

• Use Across when you are moving canonical USDC or ETH between major chains and care about speed.
• Use Uniswap when you want on-chain swaps and liquidity on a single chain.
• 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 Uniswap?

Neither has a universal price advantage. Across: Market-quoted relayer spread and LP fee; no separate flat protocol toll. Uniswap: Pool fee tier (plus any interface fee if you use a web app). 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 Uniswap?

They can overlap on supported swap routes, and an aggregator or solver may use Uniswap liquidity. Compare the executable route, destination, gas and fees rather than assuming they can only be used in sequence.

Where are the official Across and Uniswap docs?

Across: Across Docs. Uniswap: Uniswap 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
• Uniswap docs: Uniswap Docs
• Uniswap app: app.uniswap.org
• Uniswap — Protocol concepts: docs.uniswap.org/concepts/uniswap-protocol
• Uniswap — How swaps work: docs.uniswap.org/concepts/protocol/swaps

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Get the Best of Both With Rift

Rift is a strong alternative to choosing between Across and Uniswap. 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.

Trade With Rift · Integrate the API