ZKsync Bridge: Guide to Fast, Cheap, & Secure Bridging in 2025

ZKsync has emerged as a leading Ethereum Layer 2 (L2) solution, leveraging zero-knowledge-proof technology to deliver faster transactions and lower fees while maintaining full Ethereum compatibility. 

With nearly 10 million unique addresses and over $7.3 billion in bridging volume, ZKsync's growing ecosystem offers exciting opportunities in DeFi, NFTs, and other web3 applications.

Looking for the fastest, most cost-effective way to bridge assets to and from ZKsync in 2025? 

This guide explores ZKsync bridge options and shows why Across offers superior bridging solutions with near-instant transfers and minimal fees.

ZKsync is an Ethereum L2 scaling solution that uses zero-knowledge proofs (ZKPs) to speed up transactions and lower gas fees. ZKPs are cryptographic solutions that allow one party to prove to another that a statement is true without revealing details about the statement.

In ZKsync, these ZKPs underpin zk-rollups, a technology that batches (or "rolls up") numerous transactions into a single proof. This proof is then submitted to the Ethereum mainnet, allowing for efficient processing of large transaction volumes while maintaining security and decentralization.

Demand for bridging to ZKsync has grown steadily as users discover the unique opportunities this L2 ecosystem offers. Since its inception, ZKsync has consistently prioritized scalability improvements and ecosystem development, attracting users seeking better DeFi returns, NFT opportunities, and lower transaction costs.

The ecosystem's growth accelerated significantly after the ZK token airdrop concluded in January 2025, distributing 17.5% of the total supply to early adopters and contributors. With this milestone behind them, ZKsync's team has shifted focus toward sustainable long-term growth. Their $200 million ecosystem fund, deployed through the Ignite program, strategically supports developer grants, protocol incentives, and tooling improvements—all of which have successfully drawn new builders and fresh liquidity to the network.

What makes ZKsync particularly compelling in 2025 is the emergence of innovative platforms that expand what's possible within its ecosystem:

Unlike other L2  networks that rely heavily on liquidity mining incentives to drive adoption, ZKsync has built sustainable growth through practical, real-world applications and its modular ZK technology. For users looking to engage with innovative projects at the cutting edge of web3, ZKsync provides a uniquely compelling environment with lower costs and faster transactions than Ethereum mainnet.

The official ZKsync bridge is the default way to move assets between Ethereum and ZKsync. Secured by a validity-proof mechanism powered by ZKPs, this network-native bridge verifies that transactions are correct before being finalized on Ethereum—ensuring that tokens remain accounted for on both origin and destination networks.

Unlike competitors that use optimistic rollups, ZKsync’s  ZK-rollups are not limited by an eight-day challenge period. Instead, transactions are finalized on Ethereum once the ZK proof is verified, allowing for efficient withdrawals (within hours) without long delays.

Here’s an example of the fees and bridging times you can expect from the ZKsync native bridge:

When to Use the Native ZKsync Bridge

Across Protocol: The Most Efficient ZKsync Bridge

If you need faster transactions, lower costs, and seamless crosschain interoperability from Zksync to other L2s, Across is the best ZKsync bridge. 

Across uses an Intents-based bridging design secured by an Optimistic Oracle (OO). This architecture allows liquidity providers to front the transfer so that you can get your funds on the destination chain at near-instant speed while the transaction is finally settled on Ethereum. 

If you are interested in what goes on under the hood at Across Protocol, we’ve written extensively about crosschain interoperability. The long and short is that thanks to Intents,  Across delivers secure and cost-efficient finalization. 

Bridging to and from ZKsync with Across is the more efficient move because:

Across is the most efficient bridge to ZKsync, and the best part is that using Across is incredibly intuitive and user-friendly.

Step 1: Visit app.across.to

To bridge to ZKsync, visit the Across bridging app and connect your wallet.

Step 2: Select Your Chains

Next, specify your origin (from) chain and destination (to) chain for bridging. For this example, we’ll bridge from Arbitrum to ZKsync. At this time, you’ll also want to specify how much ETH you'd like to bridge, which will prompt the protocol to estimate how long your transaction might take and how much it will cost.

Note: this process is the same if you’re bridging from ZKsync back to your original chain. Just reverse the origin and destination chains.

Step 3: Confirm and Send

Once you’ve specified the amount of ETH you'd like to bridge and looked over the fee details, click on “confirm transaction” (or “switch network, and confirm,” in this case), and your coins will be on their way. Transactions are completed in seconds, so you’ll receive your assets on ZKsync almost instantly.

With that, your bridging is complete!

Superfast bridging to ZKsync!

Supercheap bridging to ZKsycn!

Bridging to ZKsync unlocks faster transactions, lower fees, and access to a growing multi-use case ecosystem—but choosing the right bridge matters.

If speed isn’t a priority, the official ZKsync bridge offers a trust-minimized way to transfer assets between Ethereum and ZKsync. Transfers to ZKsync take around 15 minutes, but withdrawals typically take three to five hours, as transactions must wait for batch processing and security verification before finalizing on Ethereum.

Additionally, the native bridge only supports direct transfers between Ethereum and ZKsync, limiting options for users looking to bridge assets from other networks.

Across offers quick transfers and lower costs across a variety of networks, making it a superior choice for moving assets to and from ZKsync—not only from Ethereum L1 but also from other prominent L2s. 

Bridge to ZKsync efficiently with Across. 

Try Across today and experience the best ZKsync bridging solution firsthand.

ZKsync has positioned itself as a leading force in the Ethereum L2 ecosystem. While still growing in popularity, ZKsync already offers a balance of scalability, security, and cost-efficiency. However, unlike other L2 contenders, ZKsync uses ZKPs to settle transactions on Ethereum, mixing near-instant finality with reduced costs.

ZKsync isn’t a single chain; rather, it is an entire ecosystem that includes the following:

Beyond ZKsync’s core platform exists a growing, developer-centric community that spans throughout web3. With an increasing number of builders joining the ZKsync ecosystem, users gain access to nearly 200 projects and dApps (and counting) to swap tokens, mint NFTs, or explore DeFi. With ZKsync’s low fees and fast finality, developers and their applications can offer users a smoother, more cost-effective experience.

Notably, with the ZKsync ecosystem continuing to expand thanks to its growing community and technical innovations, adoption of the L2 has been accelerating in multiple areas:

For more information on ZKsync, check out these resources:

If you're new to bridging, check out these guides: