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Soneium Bridge

Bridge any token to and from Soneium — Sony's consumer L2 across 50+ networks — WETH and dozens more in one non-custodial transaction. Median delivery 24 seconds via Symbiosis routing layer.

Open Soneium 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 Soneium

A real case from June 2026: a user bridged 1.8434 WETH (~$3,000) from Polygon and received 1.8425 ETH on Soneium 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 as source, Soneium as destination — the WETH sat in a Polygon wallet and the goal was access to Soneium consumer apps and entertainment.
Connected wallets. MetaMask on the Polygon side, MetaMask on the Soneium side. Symbiosis resolved the destination address automatically from the connected wallet — no manual paste required.
Entered the amount. 1.8434 WETH (~$3,000). The Polygon wallet had enough balance to cover network gas.
Reviewed the quote. Symbiosis displayed the exact ETH amount on Soneium, 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 transaction in MetaMask. ETH arrived in MetaMask within ~40 sec. The transaction is fixed on-chain — verifiable on Symbiosis Explorer, PolygonScan, and Soneium explorer.

Bridge to Soneium — live route: 1.8434 WETH (Polygon) → ETH (Soneium) · Symbiosis

About the Polygon to Soneium route

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

Hundreds of transactions have moved through this route in the last quarter, with top inbound sources from Ethereum, Base, Polygon.

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

Popular routes to Soneium: Arbitrum Bridge, Base Bridge, Katana Bridge, Optimism Bridge.

Real on-chain data from Symbiosis routing layer, period 2026-03-20 to 2026-06-18 (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 Soneium 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

0.0494 WETH

0.0006 WETH

~26s

0.25 WETH

0.2492 WETH

0.0008 WETH

~30s

1 WETH

0.9978 WETH

0.0022 WETH

~35s

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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.

What is Soneium?

Soneium is Sony's consumer-focused Ethereum Layer 2 network, built to support mainstream applications, NFTs, and on-chain experiences. Users typically bridge assets in to swap, trade, and interact with the Soneium ecosystem. With Symbiosis you can move funds onto Soneium from chains like Ethereum, Base, and Polygon without leaving the bridge widget.

How do I bridge to Soneium?

Connect your wallet to the Symbiosis widget, choose your source chain (such as Ethereum, Base, or Polygon), and select WETH as the token to move to Soneium. Enter the amount, confirm the live quote, and approve the transaction. Most transfers settle fast — median delivery is 24 seconds, with 90% completing within 43 seconds.

Is Soneium safe to use with this bridge?

Symbiosis is a non-custodial, audited routing layer, so you keep control of your funds throughout the transfer and there is no KYC requirement. Over the last 90 days the route handled $17K in volume across 280 transactions from 238 unique wallets, growing 34% quarter over quarter. You always confirm the exact output amount before signing.

How much does it cost to bridge WETH to Soneium?

The Symbiosis routing engine charges a flat fee of 0.0003 WETH per transfer regardless of size. For example, sending 0.05 WETH delivers 0.0494 WETH, 0.25 WETH delivers 0.2492 WETH, and 1 WETH delivers 0.9978 WETH — each in roughly 14 seconds. The fee stays the same, so larger transfers are proportionally cheaper.

How do I swap to Soneium?

Pick your source chain and the asset you hold, then set Soneium as the destination in the Symbiosis widget. WETH is by far the most used token on this route, making up about 98.5% of bridged volume. Review the quoted output and fee, then approve — delivery typically takes around 14 seconds.

Which chains can I bridge from to reach Soneium?

Inbound transfers come mainly from Ethereum (39.4%), Base (18.1%), Polygon (17.4%), Mantle (11.5%), and Unichain (4.9%). Just connect your wallet on any of these networks and select Soneium as the destination. The routing engine handles the path automatically.

What is the Soneium token?

Soneium is a Sony-backed Layer 2 network, and assets on it are primarily bridged in rather than native — on this route WETH dominates with about 98.5% of volume, followed by ETH at 1.5%. To get assets onto Soneium for swapping or trading, you bridge them in through Symbiosis. The most common entry point is WETH from Ethereum or Base.