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Sei Bridge

Bridge any token to and from Sei v2 — the parallelized EVM L1 across 50+ networks — USDC and dozens more in one non-custodial transaction. Median delivery 46 seconds via Symbiosis routing layer.

Open Sei bridge

Proven at scale

Five years of secure cross-chain infrastructure

2021

Live Since

2021

50+

Chains

50+

58 sec

Avg bridge time

58 sec

$10B

Total volume

$10B

CROSS-CHAIN GUIDE

How to bridge to Sei

Example quote from 25 September 2026: sending 3,000 USDC (~$3,000) from Ethereum returns about 47,691 SEI on Sei v2 via Symbiosis, estimated ~28 sec — no wrapped tokens beyond the standard route, fully non-custodial. Symbiosis works as a liquidity meta-aggregator, comparing routes across multiple DEXes and bridge providers and picking the best one by price, fee, and speed automatically. This is one of the most popular flows on this corridor; the same widget supports any source chain and token combination. Here's how the flow works:

Pick the source. Set Ethereum as source and Sei v2 as destination — the USDC sits in an Ethereum wallet, and the goal is access to Sei DeFi (Astroport, DragonSwap).
Connect wallets. MetaMask on the Ethereum side, MetaMask on the Sei v2 side. Symbiosis reads the destination address automatically from the connected wallet — no manual paste required.
Enter the amount. 3,000 USDC (~$3,000) in this example. Keep enough ETH in the wallet to cover network gas.
Review the quote. Symbiosis displays the exact SEI amount on Sei v2 (about 47,691 SEI in this example), the flat Symbiosis fee in USD, and ETA (~28 sec). The quote is locked in before signing — 2% slippage tolerance protects against sudden price moves.
Sign and confirm. Sign the Ethereum transaction in MetaMask. SEI arrives in MetaMask once the route completes — track the transfer on Symbiosis Explorer.

Sei Bridge — live route in PRO mode: 3,000 USDC (Ethereum) to 36,268.87 SEI (Sei) · Symbiosis

About bridging to Sei

Why this route. Sei is a parallelized EVM layer 1 with about 400 ms finality, tuned for trading. People bridge in to lend on Yei Finance or Takara Lend, swap on Saphyre, or hold Ondo's tokenized-treasury token USDY.
What you receive. SEI, the native token that pays gas on Sei (chain ID 1329). One transaction from your Ethereum wallet covers the swap and the delivery.
Watch out for. Sei dropped its Cosmos side under SIP-3, so the receiving account is a 0x address in an EVM wallet, not a legacy sei1 address. The Symbiosis network list shows the chain as Sei v2.
Speed. Across all routes into Sei, median delivery 29 seconds; 90th percentile 51 seconds, over the 90 days to 25 September 2026.

ROUTE ESTIMATES

Estimated fees

Approximate fees and swap time based on historical averages, updated 3x/week. Actual values may vary.

Amount

Receive

Fee + Gas

Time

500 USDC

6,046 SEI

$7.10

~29s

1,000 USDC

12,097 SEI

$12.93

~29s

2,500 USDC

30,241 SEI

$31.19

~29s

5,000 USDC

60,430 SEI

$65.84

~29s

Ready to bridge? Live rates across
50+ networks. No signup, no KYC

Ready to bridge? Live rates across 50+ networks.
No signup, no KYC

Start a swap

Crypto coins background — Symbiosis blog

WHY SYMBIOSIS

Secure by design. Proven at scale

Audited in the open

No KYC, no custody, no intermediaries. Audited by Decurity, Zokyo, SlowMist, and Omniscia — 13 public audit reports across 11 protocol modules (Core, MetaRouter v3, Pool, TON Bridge v1+v2, Relayers Network, Staking, Frontend). All reports open-source on GitHub. 4+ years live on mainnet (since March 2022) with zero major security incidents. Active bug bounty program.

Two-layer staking security

Cross-chain transactions routed via Octopools AMM (scans liquidity across DEXs and chains for minimal slippage), then signed by an MPC group via Threshold Signature Scheme (TSS) — no single party can move user funds. Two security layers: Symbiosis PoS Staking (SIS-collateralised relayer nodes) + Symbiotic restaking (additional slash-able collateral). 2/3 stake quorum for epoch changes.

$8B+ across 54 chains

$8B+ total volume bridged across 5M+ transactions from 800K+ unique wallets. Supports 54 networks — more than any other cross-chain bridge (Across 35+, deBridge 30+, Allbridge 20). EVM + non-EVM in one route — Ethereum, Solana, BNB Chain, TON, Tron, Bitcoin, Arbitrum, Polygon, and 46 more. Per-transaction range: $10 to $140,000 — handles retail swaps and whale trades on the same route.

Still have questions?

How do I bridge to the Sei network?

Connect your wallet to the Symbiosis widget, pick your source chain such as Ethereum or Monad, and select the token you want to send. Choose Sei as the destination, enter an amount, and confirm the transaction. Most transfers settle fast, with a median delivery time of 29 seconds and 90% completing within 51 seconds as of September 2026.

What network does Sei run on?

Sei is a parallelized EVM Layer 1, meaning it runs as its own chain while staying compatible with Ethereum tooling and wallets. Because it's EVM-compatible, you can bridge in assets from chains like Ethereum, BNB Chain, Base, and Arbitrum One. Symbiosis routes inbound transfers to Sei, with Ethereum currently the largest source.

How do I bridge from Base to Sei?

Open the Symbiosis widget, connect your wallet, and set Base as the source chain. Pick your token, for example USDC, then select Sei as the destination and enter the amount. Confirm the transaction and your funds typically arrive in well under two minutes.

Does the bridge support stablecoins?

Yes, stablecoins such as USDC are supported on this route. You can request a live quote in the widget before confirming any transfer.

What is the safest crypto bridge?

Symbiosis is non-custodial, audited, and requires no KYC, so you keep control of your funds throughout the transfer. Transfers into Sei have a median delivery time of 29 seconds as of September 2026.

How much does it cost to bridge to Sei?

Fees grow with the amount on current quote tiers. On 28 September 2026, bridging 500 USDC from Ethereum carried a $7.10 fee and 5,000 USDC a $65.84 fee (full cost in the Symbiosis app plus gas), with a median delivery time of 29 seconds as of September 2026. For example, 500 USDC delivered 6,046 SEI and 5,000 USDC delivered 60,430 SEI, with the exchange rate already reflected in the amount received.

What is the Sei EVM contract address?

Contract addresses depend on the specific token you're bridging, since each asset like USDC or USDT has its own deployment on Sei. Always verify the address through the Symbiosis widget or an official Sei explorer before interacting. The widget handles routing automatically, so you don't need to enter contract addresses manually for a standard bridge transfer.

Popular bridges

A few popular bridge routes

Two chains. One click

Bridge tokens to and from Sei. Non-custodial, audited, no sign-up. Live quote above.

Open Sei bridge

Sei Bridge — Symbiosis banner background

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