What is ZKsync (ZK)?
Ethereum's most EVM-compatible ZK-rollup — you can use any Ethereum dApp on ZKsync Era without changing anything, while paying a fraction of Ethereum's gas fees. Zero-knowledge proofs ensure all transactions are verified without trusting anyone.
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ZKsync at a Glance
- ✅Built by Matter Labs — founded 2018, the most funded ZK-rollup developer with over $400M raised
- ✅Full EVM compatibility — any Ethereum smart contract deploys on ZKsync Era with zero changes
- ✅ZK token airdropped June 2024 — 3.68 billion tokens went to 695,000 wallets in one of that year's largest airdrops
- ✅21 billion total ZK supply — matches Bitcoin's mythology of a fixed, well-known supply number
- ✅Native account abstraction — smart contract wallets, gas abstraction, batch transactions built in
- ✅ZKsync Hyperchains — protocol to launch app-specific ZK-rollups connected to ZKsync's network
ZK Price Statistics
| All-Time High | ~$0.35 (June 2024) |
| All-Time Low | ~$0.05 (2024) |
| ZK Token Launch | June 17, 2024 |
| Era Mainnet Launch | March 2023 |
| Total Supply | 21,000,000,000 ZK |
| Built by | Matter Labs (Alex Gluchowski) |
What is ZKsync (ZK)?
ZKsync is an Ethereum Layer 2 scaling solution that uses zero-knowledge rollups to make Ethereum transactions faster and cheaper. The basic premise: instead of every transaction being processed and stored on Ethereum (which is expensive and slow), ZKsync processes thousands of transactions off-chain, generates a cryptographic proof that all those transactions were valid, and submits that single proof to Ethereum. The result — Ethereum-level security at a tiny fraction of the cost.
Matter Labs, the company behind ZKsync, was founded by Alex Gluchowski in 2018. They've raised over $400 million from investors including a16z and Dragonfly Capital — making it one of the most well-funded L2 teams. ZKsync's flagship achievement is being the first fully EVM-compatible ZK-rollup — meaning Solidity smart contracts and Ethereum dApps work on ZKsync Era with zero modifications from the developer.
The ZK token launched in June 2024 with a massive airdrop to ~695,000 wallets and 3.68 billion tokens distributed. The airdrop was controversial — many users felt excluded, and sybil-detection (identifying fake accounts) was criticized. Despite the drama, ZK remains one of the major L2 tokens in the Ethereum ecosystem alongside Arbitrum and Optimism.
ZKsync Key Facts
How Does ZKsync Work?
ZKsync Era uses a ZK-SNARK proof system called PLONK to verify transactions on Ethereum. Here's the flow from user transaction to final Ethereum settlement:
Transaction Submitted to Sequencer
You send a transaction to ZKsync Era via MetaMask, Rabby, or any EVM wallet. The sequencer receives it and orders it with other pending transactions. Unlike Ethereum, you pay gas in ETH but at 10-100x lower rates since costs are amortized across the batch.
Executed in EVM Environment
ZKsync Era processes smart contracts in an environment that's compatible with the Ethereum Virtual Machine. This is the technical breakthrough: previous ZK-rollups couldn't run arbitrary EVM smart contracts. ZKsync Era can run any Solidity contract that works on Ethereum.
ZK Proof Generated
A prover node takes the batch and generates a ZK-SNARK proof — a compact mathematical certificate proving all transactions were valid. This proof is orders of magnitude smaller than the raw transaction data. Generation takes minutes, but verification on Ethereum takes milliseconds.
Proof Verified on Ethereum
The proof is submitted to a verifier contract on Ethereum. Once accepted, the state update is final and backed by Ethereum's security. Withdrawing back to Ethereum mainnet is trustless — you don't need ZKsync's team to cooperate. The math guarantees your funds.
ZKsync vs Other Ethereum L2s
| L2 | Type | EVM? | Withdrawal time |
|---|---|---|---|
| ZKsync Era | ZK-Rollup | Yes (native) | ~24 hours (proof generation) |
| Arbitrum | Optimistic Rollup | Yes | 7-day challenge period |
| Optimism | Optimistic Rollup | Yes | 7-day challenge period |
| Starknet | ZK-Rollup | Not native (Cairo) | ~12 hours |
| Base | Optimistic Rollup | Yes | 7-day challenge period |
ZK vs Optimistic rollups: Optimistic rollups (Arbitrum, Optimism, Base) assume transactions are valid and only run fraud proofs if challenged — hence the 7-day withdrawal wait. ZK-rollups mathematically prove validity, so withdrawals are faster and finality is cryptographic rather than game-theoretic.
ZK Tokenomics
ZK launched with a 21 billion total supply. The airdrop included 17.5% going to the community — split between ZKsync users and Ethereum contributors. However, allocation rules excluded many eligible users, and Sybil detection removed wallets that were later shown to be legitimate.
| Allocation | % of Supply | Notes |
|---|---|---|
| Ecosystem | 49.1% | Foundation treasury, future grants, protocol incentives |
| Investors | 17.2% | a16z, Dragonfly and others — 1-year cliff, 3-year vest |
| Team | 16.1% | Matter Labs employees and early contributors |
| Community Airdrop | 11% | ZKsync users weighted by activity, ETH contributors |
| GitCoin / Open Source | 6.6% | Ethereum open-source contributors |
ZKsync History
Matter Labs founded, ZKsync Lite launches
Alex Gluchowski founded Matter Labs to build ZK-rollup infrastructure. ZKsync Lite (originally ZKsync 1.0) launched in 2020 — a payment-focused ZK-rollup that couldn't run arbitrary smart contracts but could process simple ETH/ERC20 transfers extremely cheaply. Argent wallet integrated it as cheap ETH payments for retail users.
Big raises and ZKsync Era development
Matter Labs raised $50M in 2021 and $200M in 2022, becoming one of the best-funded ZK teams in crypto. They worked on the technical breakthrough: EVM compatibility. Making a ZK-rollup that could run any Ethereum smart contract was considered extremely difficult — most thought it would take years longer than it did.
ZKsync Era mainnet — first EVM ZK-rollup
ZKsync Era went live on mainnet permissionlessly in March 2023 — the first fully EVM-compatible ZK-rollup. DeFi protocols from Ethereum depeted directly: Uniswap, SyncSwap, Mute, zkSync-native protocols. Within months, billions in TVL flowed in as the ecosystem matured and users anticipated a token airdrop.
ZK token drops — controversy and ATH $0.35
The ZK airdrop distributed 3.68 billion tokens to 695,000+ wallets on June 17, 2024. The token hit ~$0.35 at launch before rapidly declining. Controversy erupted over exclusions — many loyal users were disqualified by Sybil detection algorithms. Matter Labs acknowledged some legitimate users were incorrectly excluded but did not recompense them.
Hyperchains and Elastic Network
ZKsync launched its "Elastic Network" vision — a network of ZK-powered rollups (Hyperchains) that can settle to ZKsync Era or directly to Ethereum. Any application could launch its own sovereign ZK-rollup using ZKsync's tech stack, creating an ecosystem of connected app-specific chains. This mirrored Arbitrum Orbit and Optimism's Superchain strategy.
Risks and Considerations
Centralized sequencer
Like most L2s, ZKsync's sequencer is still operated by Matter Labs. In theory, Matter Labs could censor transactions (though proofs prevent fund theft). Decentralizing the sequencer is on the roadmap but not yet live.
Airdrop reputation damage
The June 2024 airdrop controversy damaged community trust. Many users who bridged to ZKsync expecting rewards received nothing, while the tokenomics gave 33% to investors and team. Community perception of Matter Labs has been mixed since the launch.
Strong L2 competition
Base (Coinbase's L2), Arbitrum, and Optimism all have larger ecosystems. ZKsync's technical advantages don't automatically translate into user or developer adoption against incumbents with established network effects and better-received token distributions.
Massive insider allocation
Investors (17.2%) and team (16.1%) together hold 33.3% of all ZK. With vesting schedules running 3-4 years, there will be sustained selling pressure from insiders as their tokens unlock — a structural headwind for ZK's price in the near to medium term.
Where to Buy ZK
ZK is available on all major exchanges since its June 2024 launch. See our how to buy crypto guide for help getting started.
Pros and Cons of ZKsync (ZK)
✅ Pros
- Full EVM compatibility — any Solidity app works without changes
- Cryptographic security — ZK proofs, not fraud proofs like Optimistic L2s
- Faster finality — ~24h vs 7-day Optimistic withdrawal period
- Native account abstraction — better wallet UX than Ethereum mainnet
- Well-funded team — $400M+ raised from top VCs
❌ Cons
- Airdrop controversy — damaged community trust at launch
- Heavy insider allocation — 33% to team and investors
- Smaller ecosystem — than Arbitrum, Base, Optimism
- Centralized sequencer — not yet decentralized
- Price far below ATH — $0.35 → significant decline
Frequently Asked Questions
What is ZKsync?
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What are ZKsync Hyperchains?
What happened with the ZK airdrop?
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