A head-to-head comparison of Across Protocol and Synapse Protocol — pricing, the features that actually differ, and which one fits which use case.
Intent-based cross-chain bridge with the fastest settlement and lowest fees on EVM routes
Widely-used cross-chain bridge and AMM with near-zero-fee stablecoin routes
These are the 5 capabilities where the two tools genuinely diverge — the rest of their feature sets overlap.
| Capability | Across Protocol | Synapse Protocol |
|---|---|---|
| Settlement Time | ~2 minutes | ~1-10 min |
| Bridge Model | Intent-based (relayer network) | Liquidity network + AMM |
| Fee Model | Dynamic LP fee only | Low bridge + swap fee |
| Canonical Security | Yes | No |
| Arbitrary Messaging | No | Yes |
| Feature | Across Protocol | Synapse Protocol |
|---|---|---|
| Settlement Time | ~2 minutes | ~1-10 min |
| Bridge Model | Intent-based (relayer network) | Liquidity network + AMM |
| Fee Model | Dynamic LP fee only | Low bridge + swap fee |
| Canonical Security | ✓ | ✗ |
| Cross Chain Messages | ✓ | ✓ |
| Governance Token | ✓ | ✓ |
| Multi Chain | ✓ | ✓ |
| Self Custody | ✓ | ✓ |
| Arbitrary Messaging | ✗ | ✓ |
| Non Evm Support | ✗ | ✗ |
Both tools are free to use — costs come from network or usage fees.
Across Protocol
Free
Synapse Protocol
Free
Watch out: EVM-only — no Solana, Bitcoin, or non-EVM chain support.
Watch out: AMM bridging incurs slippage on large/illiquid routes.
Across Protocol edges ahead on our editorial score (4.6/5), but these tools aren’t straight substitutes. Pick Across Protocol when fastest evm bridge — ~2 minutes vs hours for canonical bridges matters most to your workflow; pick Synapse Protocol when battle-tested with enormous cumulative volume is the priority. The deciding factor is usually the trade-off you can least afford — Across Protocol means accepting that evm-only — no solana, bitcoin, or non-evm chain support, while Synapse Protocol means amm bridging incurs slippage on large/illiquid routes.
Across Protocol carries the higher editorial rating (4.6/5 vs 4.2/5), but they solve different problems. Across Protocol is the stronger pick when you need fastest evm bridge — ~2 minutes vs hours for canonical bridges. Synapse Protocol wins when battle-tested with enormous cumulative volume.
Both tools are free to use, with costs coming from network or usage fees rather than subscriptions.
Across Protocol's main limitation is that evm-only — no solana, bitcoin, or non-evm chain support. For Synapse Protocol, amm bridging incurs slippage on large/illiquid routes. Weigh these against how you actually plan to use the tool.
In most cases yes — many teams run both, using each where it's strongest. Since Across Protocol leads on fastest evm bridge — ~2 minutes vs hours for canonical bridges and Synapse Protocol on battle-tested with enormous cumulative volume, the two are often complementary rather than mutually exclusive.