Relay is the cheapest bridge we checked for plain token transfers: its docs list a 0.00% platform fee on bridges, plus a $0.02 execution cost and gas, across 69+ networks. Across is the pick for moves between Ethereum and its layer 2s. Every bridge here names its auditors on its own pages. deBridge and Symbiosis are not on this list because their terms exclude US residents.
Quick answer
Use Relay for low-fee transfers across many networks, Across for Ethereum and L2 moves, and Allbridge Core for stablecoin transfers.
- 01Relay: best for low fees
- 02Across: best for Ethereum L2s
- 03Stargate: best for chain coverage
- 04Allbridge: best for stablecoins
- 05Portal Bridge (Wormhole): best for Wormhole tokens
The 6 best crypto bridges
Relay's docs list a 0.00% platform fee on token bridges and 0.01% to 0.15% on swaps, plus a $0.02 execution cost and gas. It covers 69+ networks and names Spearbit, Certora and Zellic as auditors.
- Chains
- EVM chains, Solana, Bitcoin and others
- Platforms
- Web, API, SDK
- Custody
- Non-custodial
- Fees
- 0.00% platform fee on token bridges; 0.01% to 0.15% on swaps; plus $0.02 flat execution cost and gas
- Chains
- 69+ networks
Pros
- 0.00% platform fee on plain token bridges
- Routes across 69+ networks per its docs
- Depository audited by Spearbit and Certora; settlement by Zellic
Cons
- Platform fee up to 0.15% on minor-asset swaps
- $0.02 flat execution cost plus destination gas on every transfer
- Depository withdrawals depend on the Allocator's MPC signing authority
Skip it if you want a governance token: Relay has none.
Across supports 22 chains and shows its cost as an LP fee plus a relayer fee, taken as the gap between what you send and what you receive. OpenZeppelin audited it.
- Chains
- Ethereum, Arbitrum, Base, BNB Chain and other EVM chains
- Platforms
- Web, API
- Custody
- Non-custodial
- Fees
- LP fee plus relayer fee, taken as the gap between input and output amount
- Chains
- 24 chains
Pros
- Supports 24 chains per its docs
- Contracts audited by OpenZeppelin
- Bug bounty pays up to $1,000,000 for critical issues
Cons
- LP fee rises steeply once pool utilization passes its kink
- Blast support scheduled for removal on July 20, 2026
- Mostly EVM chains
Skip it if you need Solana-only or non-EVM routes Across does not list.
Stargate V2 has mainnet contracts on 46 chains and has run since March 17, 2022. V2 uses a dynamic fee that can turn into a rebate; Zellic and OtterSec audited V2.
- Chains
- Ethereum, Arbitrum, Base, BNB Chain and other EVM chains
- Platforms
- Web, API
- Custody
- Non-custodial
- Fees
- Dynamic fee or rebate in V2 (V1 was a flat 6 bps); 5/6 to treasury, 1/6 to veSTG
- Chains
- 46 chains (V2 mainnet contracts)
Pros
- V2 contracts deployed on 46 chains
- V2 audited by Zellic and OtterSec; V1 by Zellic, Quantstamp and Zokyo
- Transfers on depleted routes can earn a rebate instead of paying a fee
Cons
- Dynamic V2 fee is not a fixed published rate
- User also pays LayerZero execution and DVN fees in native gas
- V2 bounty page in docs still says coming soon
Skip it if you want a fixed fee rate: V2 does not publish one.
Allbridge Core charges a 0.1% service fee plus a relayer fee and was audited by Kudelski Security, Quarkslab and Sherlock.
- Chains
- EVM chains and non-EVM chains such as Solana
- Platforms
- Web, SDK
- Custody
- Non-custodial
- Fees
- 0.1% service fee plus a relayer fee
- Security audits
- Kudelski Security, Quarkslab, Sherlock, Blaize Security (Sui bridge)
Pros
- Flat 0.1% service fee on Core transfers
- No liquidity pool price impact on Core transfers
- Relayer fee can be paid in ABR0 at a discount
Cons
- Relayer fee rises on destination chains with high gas
- Allbridge Classic shuts down in November 2026, so older routes go away
- Focus is stablecoins, not arbitrary tokens
Skip it if you bridge large amounts: a 0.1% fee is $100 on $100,000.
Portal Bridge runs on Wormhole, which has Core Contracts on 37 mainnet chains and lists 29 audits by firms including Trail of Bits and OtterSec.
- Chains
- Ethereum, Solana, Sui, Aptos, Base, Arbitrum and other chains
- Platforms
- Web, SDK
- Custody
- Non-custodial
- Chains
- 36 mainnet chains with Core Contracts
- Security audits
- 29 audits: Trail of Bits, Neodyme, Kudelski, OtterSec, Certik, Hacken, Zellic, Coinspect, Halborn, Cantina
Pros
- Core Contracts on 36 mainnet chains, including Solana, Sui and Aptos
- 29 third-party audits listed in Wormhole docs
- Bug bounty run through Immunefi
Cons
- Wormhole docs note a listed Core Contract does not guarantee the chain is currently connected
- HyperEVM integration flagged as experimental in Wormhole docs
- Message validity depends on the Guardian network rather than on-chain light clients
Skip it if you want a published fee: we found no protocol fee on Portal's FAQ or Wormhole's docs.
Synapse supports 20+ EVM and non-EVM chains with the SYN token. Its docs say its features will fold into a new product called Cortex.
- Chains
- Ethereum, Arbitrum, Base, Optimism, Avalanche and other chains
- Platforms
- Web, API, SDK
- Custody
- Non-custodial
- Chains
- 20+ EVM and non-EVM chains
- Token
- SYN
Pros
- Bridges between 20+ EVM and non-EVM chains
- Native USDC route through Circle CCTP
- SDK, REST API and embeddable widget for integrators
Cons
- Pool routes convert through nUSD or nETH intermediate tokens
- Docs say all features will fold into Cortex, so the product is in transition
- No audit list in the current docs
Skip it if you want a published fee and audit list: current docs show neither.
Not on this list
hop-protocol: Not operating: its site no longer serves the bridge app when we checked on Sep 26, 2026.
deBridge: Terms exclude US residents: deBridge's terms exclude US persons.
Symbiosis: Terms exclude US residents: Symbiosis's terms exclude US residents, citizens and US-incorporated entities.
Crypto Bridges compared
Select a name to jump to its review.
| Name | Best for | US availability | Fees | Chains | Custody |
|---|
| Relay | Cheap transfers, many chains | Available: terms restrict only sanctioned jurisdictions | 0.00% platform fee on token bridges; 0.01% to 0.15% on swaps; plus $0.02 flat execution cost and gas | EVM chains, Solana, Bitcoin and others | Non-custodial |
|---|
| Across | Ethereum and L2 moves | Available: terms restrict only sanctioned jurisdictions | LP fee plus relayer fee, taken as the gap between input and output amount | Ethereum, Arbitrum, Base, BNB Chain and other EVM chains | Non-custodial |
|---|
| Stargate | Native assets, 46 chains | Available: terms restrict only sanctioned jurisdictions | Dynamic fee or rebate in V2 (V1 was a flat 6 bps); 5/6 to treasury, 1/6 to veSTG | Ethereum, Arbitrum, Base, BNB Chain and other EVM chains | Non-custodial |
|---|
| Allbridge | Stablecoin transfers | Available: terms name no country restrictions | 0.1% service fee plus a relayer fee | EVM chains and non-EVM chains such as Solana | Non-custodial |
|---|
| Portal Bridge (Wormhole) | Wormhole-native assets | Available: terms restrict only sanctioned jurisdictions | Manual route: gas on both chains; automatic route: one origin transaction plus a small relayer fee | Ethereum, Solana, Sui, Aptos, Base, Arbitrum and other chains | Non-custodial |
|---|
| Synapse | Existing Synapse users | Available: terms restrict only sanctioned jurisdictions | Not verified | Ethereum, Arbitrum, Base, Optimism, Avalanche and other chains | Non-custodial |
|---|
“Not verified” means we could not confirm the value on the project’s own pages.
How we rank crypto bridges
- 01Published fee: the protocol's own fee from its docs, excluding gas. A fee we could not find counts against the bridge.
- 02Chain coverage: how many networks the bridge's own docs list.
- 03Audits: named auditors on the bridge's own pages.
- 04Track record: launch date and published incidents, where the project states them.
No project paid to be listed or ranked. Full rules: methodology.
What we did not test
- We did not open accounts, deposit money or place trades with these services.
- We did not audit smart contracts, reserves or security claims ourselves; we report what the project and its auditors publish.
- Fees, limits and availability change; the list date shows when we last checked them.
Rubric last updated Oct 1, 2026. Crypto assets are not insured by the FDIC or SIPC, and you can lose all the money you put in. This page is educational content, not financial advice.
How to choose
01Check the received amount, not only the fee
Across and Relay show cost as the difference between input and output. Compare the final amount you receive across two bridges before you sign.
02Send a small test first
Bridges are a common exploit target. Move a small amount first and confirm it arrives on the right network.
03Prefer native assets over wrapped ones
A native token on the destination chain avoids depending on the bridge's wrapped version keeping its value.
04Use the bridge's own URL
Phishing copies of bridge sites are common. Open the official link from the project's docs or this directory.
Who should skip all of these
- Anyone moving funds between exchanges on the same network: a direct withdrawal is cheaper than a bridge.
- Users looking for historical bridges such as Hop Protocol: it is not operating.
Bottom line
Relay and Across cover most everyday moves at low cost; Allbridge Core suits stablecoin transfers.
Whatever you use, test with a small amount and check the received amount before signing.
Educational content, not financial advice. Crypto assets are volatile; do your own research.
FAQ
What is a crypto bridge?
±
A protocol that moves tokens or messages from one blockchain to another, for example USDC from Ethereum to Base.
Which crypto bridge has the lowest fees?
±
Of the fees we checked, Relay lists a 0.00% platform fee on token bridges plus a $0.02 execution cost and gas. Allbridge Core charges 0.1% plus a relayer fee.
Are crypto bridges safe?
±
They carry smart contract risk. Each bridge here names its auditors, but audits do not rule out exploits, so test with small amounts.
Is Hop Protocol still working?
±
We excluded it: when we checked on Sep 26, 2026, its site no longer served the bridge app.
Relay or Across: which is cheaper?
±
Relay publishes a rate: 0.00% platform fee on plain token bridges plus a $0.02 execution cost and destination gas. Across has no fixed rate: you pay an LP fee plus a relayer fee, taken as the gap between what you send and what arrives, and the LP fee is zero when the relayer is repaid on the origin chain. Compare the amount received on the same route.
What changed in this list
2026-09-26First version: eight crypto bridges ranked on published fees, chain coverage and audits.
2026-09-26Moved deBridge and Symbiosis to Not on this list: their terms exclude US residents. List now ranks 6 bridges.
2026-10-01Added a Relay vs Across fee FAQ.
Who made this page
✓
Fact check
Checked against 23 sourcesLast check: Oct 1, 2026
A value we could not confirm on the project’s own pages is marked “Not verified” instead of estimated.
How we review