Products

Dev Portal

MCP Server

Swap & Bridge

Resources

Swap

Products

Dev Portal

MCP Server

Swap & Bridge

Resources

Swap

All bridge routes

Unichain Bridge

Bridge any token to and from Unichain — Uniswap's L2 across 50+ networks — WETH, ETH and dozens more in one non-custodial transaction. Median delivery 23 seconds via Symbiosis routing layer.

Open Unichain bridge

Numbers

Proven performance

+ chains

Supported Networks

+ chains

Supported Networks

years

On the Market

years

On the Market

sec

Average Bridge Time

sec

Average Bridge Time

incidents

Since Launch

incidents

Since Launch

How to bridge to Unichain

A real case from April 2026: a user bridged 0.1470 WETH (~$303) from Polygon zkEVM and received 0.1458 ETH on Unichain via Symbiosis — 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 the exact flow:

Picked the source. Polygon zkEVM as source, Unichain as destination — the WETH sat in a Polygon zkEVM wallet and the goal was access to Uniswap-native trading and DeFi.
Connected wallets. MetaMask on the Polygon zkEVM side, MetaMask on the Unichain side. Symbiosis resolved the destination address automatically from the connected wallet — no manual paste required.
Entered the amount. 0.1470 WETH (~$303). The Polygon zkEVM wallet had enough balance to cover network gas.
Reviewed the quote. Symbiosis displayed the exact ETH amount on Unichain, the flat Symbiosis fee in USD, and ETA. The quote was locked in before signing — 2% slippage tolerance protects against sudden price moves.
Signed and confirmed. Signed the Polygon zkEVM transaction in MetaMask. ETH arrived in MetaMask within ~681 sec. The transaction is fixed on-chain — verifiable on Symbiosis Explorer, Symbiosis Explorer, and Uniscan.

About the Polygon zkEVM to Unichain route

The Unichain corridor on Symbiosis routes WETH, ETH and 100+ other tokens through the optimal mix of DEXes and bridge providers, with destination tokens delivered natively on Unichain.

Hundreds of transactions have moved through this route in the last quarter, with top inbound sources from Polygon zkEVM, BNB Chain, Arbitrum One.

The corridor is non-custodial — funds remain in the user's wallet at every step, and the same widget supports the reverse direction (Unichain to 50+ destinations). No sign-up, no KYC.

Popular routes to Unichain: Arbitrum Bridge, Base Bridge, Mantle Bridge, ZkSync Era Bridge.

Real on-chain data from Symbiosis routing layer, period 2026-03-21 to 2026-06-19 (90 days). Aggregate stats refreshed quarterly. Transactions verified via source and destination chain explorers.

Fees

Sample bridge quotes

Live quotes from the Symbiosis routing engine for the Ethereum to Unichain corridor (WETH to WETH), across four amount tiers. Flat protocol fee — cost grows with route complexity, not amount.

Amount

Receive

Fee + Gas

Time

0.05 WETH

0.0495 WETH

0.0005 WETH

~39s

0.25 WETH

0.2493 WETH

0.0007 WETH

~45s

1 WETH

0.9982 WETH

0.0018 WETH

~52s

Bridge now

Check your own quote

Above are averages — enter your amount below for a live quote with exact fees, route preview, and one-click bridge.

Benefits

Why Symbiosis

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.

Audited in the open

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.

Two-layer staking security

$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.

$8B+ across 54 chains

FAQs

Got questions?

Still have questions? Contact us and we’ll help you out.

How do I bridge from Ethereum to Unichain?

Connect your wallet to the Symbiosis Unichain bridge widget, then select your source chain and token — for example WETH, which accounts for 77.5% of volume routed here. Choose Unichain as the destination, enter the amount, and confirm the quote. The route is fully non-custodial, and median delivery currently runs around 23 seconds.

Does Uniswap have a bridge?

Yes. Symbiosis provides a non-custodial routing layer into Unichain, Uniswap's L2, letting you move assets in from networks like Polygon zkEVM, BNB Chain, Arbitrum One, Katana, and Abstract. You bridge directly through the widget without handing custody of your funds to a third party.

What is the safest crypto bridge?

Safety comes down to custody, audits, and verifiable activity. Symbiosis is non-custodial and audited, requires no KYC, and its routing into Unichain shows real throughput — 29 transactions across 24 unique wallets in the last 90 days with a median delivery of 23 seconds. You stay in control of your assets the entire time.

What does it cost to bridge to Unichain?

The Symbiosis routing engine currently charges a flat 0.0003 WETH fee per route. For instance, bridging 1 WETH delivers 0.9982 WETH, 0.25 WETH delivers 0.2493 WETH, and 0.05 WETH delivers 0.0495 WETH. Each of these quotes processes at roughly zero seconds of estimated routing time.

What problem does Unichain solve?

Unichain is Uniswap's L2, built to make swaps and DeFi activity faster and cheaper than transacting on Ethereum mainnet. The Symbiosis bridge solves the on-ramp piece by routing assets in from chains like Polygon zkEVM (47.4% of inbound volume) and BNB Chain (20.8%) so you can get funds onto Unichain quickly.

How does Unichain work?

Unichain is an L2 from Uniswap that handles transactions off Ethereum mainnet for lower cost and faster settlement. To use it, you first need assets there, which is where the Symbiosis bridge comes in — it delivers tokens like WETH and ETH from multiple source chains, with 90% of transfers completing within 175 seconds.

What is the best crypto bridge for Unichain?

Judge bridges on custody, cost, and measurable performance rather than marketing claims. Symbiosis routes into Unichain non-custodially with a flat 0.0003 WETH fee, a 23-second median delivery, and audited, no-KYC infrastructure. Inbound volume has grown 1510% quarter over quarter, led by WETH at 77.5%.