LI.FI vs. Relay
Rift Research
Last updated
TLDR: LI.FI is a cross-chain routing and aggregation layer. Relay is a cross-chain intents and payments protocol. Consider LI.FI when you need broad coverage with an SDK, widget and agent tools. Consider Relay when you need fast small-to-mid transfers and payments across many networks. Confirm the live winner on rates.gg.
What each protocol is
LI.FI. LI.FI is a routing and orchestration layer. One integration reaches bridges, DEXs, solvers and yield protocols for same-chain swaps, cross-chain swaps, and multi-step flows. Official docs: LI.FI Docs. App: li.fi.
Relay. Relay is a cross-chain intents protocol. Users deposit into a per-chain Depository; solvers fill on the destination; a dedicated settlement chain and oracle reimburse the solver. Official docs: Relay Docs. App: relay.link.
Short version
| Dimension | LI.FI | Relay |
|---|---|---|
| Role | Cross-chain routing and aggregation layer | Cross-chain intents and payments protocol |
| Fee | Integrator and service fees configured per integration; see LI.FI docs | Solver spread plus small protocol components, quoted per order |
| Coverage | Supported networks through bridges, DEXs and solvers; coverage varies by route | Networks and assets supported by the selected Relay route |
| Settlement | Depends on the winning underlying route (can be wrapped or native) | Solver fronts destination liquidity; protocol settles after proof |
| Trust model | LI.FI router plus each underlying bridge, DEX or solver | Non-upgradable Depository contracts; Allocator-authorised withdrawals; audited settlement stack |
| Good fit for | Broad coverage with an SDK, widget and agent tools | Fast small-to-mid transfers and payments across many networks |
| Docs | LI.FI Docs | Relay Docs |
Where each fits
LI.FI may fit when:
- You need one integration that covers the long tail of chains and tokens
- You want widgets, SDK, MCP and agent tooling in the same stack
- The product is a general-purpose cross-chain app, not a single corridor
Relay may fit when:
- Speed on a small or mid-size transfer matters most
- You need a long list of networks from one integration
- The job is a payment or simple transfer, not a multi-step DeFi action
Key differences
LI.FI and Relay 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 LI.FI when you need broad coverage with an SDK, widget and agent tools.
- Use Relay when you need fast small-to-mid transfers and payments across many networks.
- 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, LI.FI or Relay?
Neither has a universal price advantage. LI.FI: Integrator and service fees configured per integration; see LI.FI docs. Relay: Solver spread plus small protocol components, quoted per order. 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 LI.FI a substitute for Relay?
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 LI.FI and Relay docs?
LI.FI: LI.FI Docs. Relay: Relay Docs. Live rate comparison: rates.gg.
Official sources
- LI.FI docs: LI.FI Docs
- LI.FI app: li.fi
- LI.FI — What LI.FI provides: docs.li.fi/introduction/introduction
- LI.FI — Product stack: docs.li.fi/introduction/product-stack
- LI.FI — API overview: docs.li.fi/api-reference/introduction
- Relay docs: Relay Docs
- Relay app: relay.link
- Relay — How Relay works: docs.relay.link/how-relay-works
- Relay — Protocol design: docs.relay.link/references/protocol/how-it-works
- Relay — Security and audits: docs.relay.link/references/protocol/security
Get the Best of Both With Rift
Rift is a strong alternative to choosing between LI.FI and Relay. 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.