zkEVM Types Compared: Polygon vs zkSync vs Scroll 2026
— By Tony Rabbit in Tutorials
Polygon zkEVM, zkSync Era, and Scroll compared. Type 1 to Type 4 zkEVMs, equivalence, prover speeds, fees, and which to pick in 2026.
ZK Layer 2 deep dive
zkEVM Types Compared: Polygon vs zkSync vs Scroll 2026
From Type 1 perfect equivalence to Type 4 custom virtual machines, the zkEVM landscape splits along proving cost, compatibility, and ecosystem trade offs. Polygon zkEVM, zkSync Era, and Scroll sit at three distinct points on that spectrum, and the choice shapes everything from gas fees to which contracts deploy without changes.
Polygon zkEVM
Type 3
Near EVM equivalent
zkSync Era
Type 4
High level equivalent
Scroll
Type 2
Bytecode equivalent
Avg fee 2026
$0.02 to $0.18
Per swap, all three
When a developer chooses a zkEVM in 2026, they are not really picking a chain. They are picking a point on a curve that trades Ethereum equivalence against proving cost. Vitalik Buterin published the now standard typology in 2022, sorting ZK rollups by how faithfully they reproduce the Ethereum Virtual Machine, and the chains that have shipped real production traffic since then sit at very different points on that curve. Polygon zkEVM occupies the Type 3 middle, accepting small breaks in equivalence to keep proving fast. zkSync Era took the most radical position with a Type 4 custom VM that does not execute EVM bytecode at all. Scroll moved from Type 3 toward Type 2 over 2024 and 2025, and by 2026 markets itself as the closest production system to full bytecode equivalence.
Featured Snippet
Polygon zkEVM is a Type 3 zkEVM that prioritizes prover speed over perfect equivalence. zkSync Era is a Type 4 zkEVM with a custom VM and native account abstraction. Scroll is a Type 2 zkEVM aiming for bytecode level equivalence with Ethereum L1. The right choice depends on whether you value perfect compatibility, account abstraction features, or the lowest possible fees, and by 2026 all three have matured enough that the differences are practical rather than experimental.
The Vitalik Typology: Type 1 to Type 4 Explained
The five types come from a 2022 essay that became the canonical reference for ZK rollup classification. Each step down the list trades a bit of Ethereum equivalence for a meaningful gain in proving efficiency, and the trade is not linear. The cost of dropping from Type 4 to Type 1 is roughly two orders of magnitude in proving compute under current hardware, which is why no team in production has yet shipped a Type 1 with the throughput of a Type 4. The trade off is the entire reason the typology exists.
| Type | What it equals | Proving cost | Example 2026 |
|---|---|---|---|
| Type 1 | Full Ethereum equivalent | Highest | Taiko |
| Type 2 | Fully EVM equivalent | High | Scroll |
| Type 2.5 | EVM equivalent with gas tweaks | Medium high | Linea |
| Type 3 | Almost EVM equivalent | Medium | Polygon zkEVM |
| Type 4 | High level language equivalent | Lowest | zkSync Era |
Type 1 systems prove the EVM exactly as specified, including gas accounting quirks and storage layout decisions never designed with ZK proving in mind. Every opcode must be modeled in the proving circuit, including awkward ones like KECCAK256 and MODEXP. Type 2 allows small gas cost changes but keeps bytecode and the storage model identical, so any L1 contract runs without recompilation. Type 2.5 adjusts a few more gas costs to keep the prover from blowing up on outlier opcodes.
Type 3 systems make larger compromises by removing a few precompiles or changing how storage trees are committed. Type 4 systems abandon EVM execution entirely and compile Solidity to a custom intermediate representation that runs on a purpose built ZK friendly VM. The proving cost drops by an order of magnitude, but contracts have to be recompiled and some EVM specific behaviors do not translate.
Polygon zkEVM: The Type 3 Pragmatist
Polygon zkEVM launched mainnet in March 2023 as a Type 3 zkEVM optimized for production traffic on day one. The team made a series of pragmatic decisions that pushed equivalence below Type 2 in exchange for prover throughput that could actually keep up with mainnet level transaction volume. The chain uses a STARK based prover wrapped in a SNARK for L1 verification, with proof aggregation that batches multiple transaction proofs into a single succinct proof submitted to Ethereum. By 2026 the prover has been upgraded enough that Polygon zkEVM advertises itself as moving toward Type 2, though purists still classify the current production system as Type 3 because a handful of opcodes behave differently.
The differences are small but real. Polygon zkEVM does not support SELFDESTRUCT in the same way Ethereum L1 does, and the precompile set is slightly trimmed. Storage proofs use a different commitment scheme, which matters for cross chain protocols that rely on Merkle proofs of L1 state. For the vast majority of dapps these differences are invisible. Uniswap, Aave forks, and standard DeFi tooling deploy without modification. Fees sit at the lower end of zkEVM averages at $0.02 to $0.10 per swap, and full L1 finality lands in fifteen to thirty minutes.
Polygon zkEVM Snapshot 2026
Type: 3 trending toward 2. Prover: STARK with SNARK wrap. Native token: POL for gas after the MATIC migration. EVM compat: Roughly 95 percent of standard contracts deploy unchanged. Strength: Wide ecosystem inherited from Polygon PoS, deep tooling, low fees. Weakness: Not bytecode equivalent, edge case contracts require patches.
zkSync Era: The Type 4 Outlier
zkSync Era took the opposite philosophical position. Rather than try to prove the EVM directly, the team designed a custom virtual machine called the zkVM that is specifically built to be cheap to prove in zero knowledge. Solidity compiles to a special intermediate representation called LLVM IR, which is then lowered to zkVM bytecode. The result is a chain that costs roughly an order of magnitude less to prove per transaction than a Type 1 or Type 2 system, which translates directly into lower fees and higher throughput. By 2026 zkSync Era regularly handles transaction volumes that would be uneconomic on stricter zkEVM types.
The cost of that efficiency is that zkSync Era is not bytecode compatible with Ethereum. Contracts written in Solidity have to be compiled using a special compiler, and some assembly level patterns that work on Ethereum do not work on zkSync. Storage layouts are different, gas costs are different, and a few precompiles behave differently. The team has worked hard to keep the developer experience as close to Ethereum as possible at the Solidity level, and for greenfield projects the difference is mostly invisible. For protocols porting existing battle tested code from L1, the recompilation and testing burden is real.
The payoff is more than just fees. zkSync Era ships native account abstraction at the protocol level. Every account is effectively a smart contract account. Users pay gas in any ERC 20 token, sponsor transactions for other users, set custom signature schemes including passkeys, and batch multiple operations atomically. On Ethereum L1 these features need ERC 4337 with separate bundlers. On zkSync they are baked in. By 2026 this is the single biggest reason teams pick zkSync for consumer apps.
zkSync Era Snapshot 2026
Type: 4 custom VM. Prover: Boojum STARK plus SNARK wrap. Native token: ZK for governance, ETH for gas. EVM compat: Solidity source level, not bytecode. Strength: Native account abstraction, lowest fees among zkEVMs, deep wallet integrations. Weakness: Requires recompilation, some assembly patterns break, less direct L1 tooling reuse.
Scroll: The Type 2 Purist
Scroll launched mainnet in October 2023 with a clear identity: be the closest thing to a bytecode equivalent zkEVM that production traffic can run on. The team committed to Type 2 from the start, meaning the chain executes the same EVM bytecode that Ethereum L1 executes, with the same opcode set, the same precompiles, and the same storage model. The only differences are at the level of gas costs for a few opcodes that would otherwise blow up the prover, which is the line between strict Type 2 and Type 2.5. By 2026 Scroll has narrowed even those gas differences and positions itself as trending toward Type 1.
The proving system is a custom SNARK construction built with the Privacy and Scaling Explorations group at the Ethereum Foundation. The circuit models the EVM directly rather than going through an intermediate representation. The trade off is what the typology predicts: higher proving costs translate into modestly higher fees, with Scroll sitting at roughly $0.05 to $0.18 per swap in 2026. The payoff is that contracts deployed on Ethereum L1 deploy on Scroll unchanged, storage proofs from L1 verify using the same Merkle Patricia trie format, and tools like Foundry and Hardhat work without modification. The ecosystem is smaller than Polygon zkEVM or zkSync Era, but the technical purity has attracted serious DeFi protocols that prioritize compatibility over fees.
Scroll Snapshot 2026
Type: 2 trending toward 1. Prover: Custom SNARK with EVM circuit. Native token: SCR for governance, ETH for gas. EVM compat: Full bytecode equivalence, identical storage model. Strength: No surprises, full L1 tooling reuse, audit friendly. Weakness: Higher fees than Type 3 and Type 4 peers, smaller ecosystem.
Side by Side Feature Comparison
The three chains differ on dimensions that compound. Lower fees on zkSync come from Type 4 design that also brings native account abstraction and the recompilation cost. Scroll's Type 2 purity costs more in fees but preserves perfect tool compatibility. Polygon zkEVM sits in the middle, the consistent pattern for Type 3.
Use Cases: When to Pick Which
The right zkEVM depends entirely on what you are building or trading. For a consumer wallet that needs gasless transactions, social recovery, and the cheapest possible fees, zkSync Era's native account abstraction is a meaningful advantage. For a DeFi protocol porting existing audited L1 code, Scroll's bytecode equivalence eliminates an entire class of porting bugs. For a team that wants the largest possible reach with minimum integration effort, Polygon zkEVM's ecosystem and tooling depth is hard to beat. The decision is not about which chain is best in absolute terms but which point on the typology curve matches your priorities.
Pick Polygon zkEVM if
You want the broadest ecosystem reach, you already have Polygon PoS integrations to extend, you need moderate fees with no recompilation, and you can accept the small set of opcode differences that come with Type 3.
Pick zkSync Era if
You are building consumer apps that need account abstraction, gas paid in ERC 20s, or the lowest possible fees, and you are willing to use the special Solidity compiler and accept that contracts will not be bytecode identical to L1.
Pick Scroll if
You are porting battle tested L1 contracts and cannot afford bytecode differences, you need L1 storage proofs to verify cross chain, or you value protocol level auditability over the absolute lowest fees.
The Proving Pipeline in Practice
All three chains follow a similar high level flow. Transactions hit a sequencer, get executed and batched, and the batch is sent to a prover that generates a ZK proof. The proof and new state root are posted to L1, where a verifier contract confirms the proof. The user sees confirmation in seconds, but full L1 finality takes longer because proving is computationally expensive.
The L2 to L1 settlement flow
STEP 1
Submit tx to sequencer
STEP 2
Sequencer batches and executes
STEP 3
Prover generates ZK proof
STEP 4
Proof posted to L1 verifier
STEP 5
State root finalized on L1
The practical consequence is withdrawal latency. Exiting assets back to L1 requires waiting for L1 finality, typically fifteen minutes to an hour. Fast bridges front the funds on L1 for a small fee, and by 2026 most users withdraw via these bridges rather than waiting natively. Still, the underlying constraint is set by the proving system, and the type number is a strong predictor of how fast finality lands.
Trader and Developer Takeaways
For traders moving capital across L2s in 2026, the practical differences have narrowed and the choice is mostly about ecosystem depth. zkSync Era has the deepest DeFi ecosystem among the three with the largest TVL and most active perpetuals and lending markets. Polygon zkEVM benefits from the broader Polygon ecosystem and is the most common destination for projects bridging from Polygon PoS. Scroll has a smaller TVL but a higher concentration of audit conscious protocols.
For developers, the call is more concrete. New consumer apps should default to zkSync Era for account abstraction and the lowest fees, accepting the special compiler workflow. Forks of existing L1 protocols should default to Scroll, where bytecode equivalence eliminates porting bugs and makes audits cheaper. Teams wanting the widest distribution and most existing integrations should consider Polygon zkEVM, especially with prior Polygon PoS presence. The Vitalik typology has proven a remarkably durable framework three years into production.
"The right zkEVM is the one whose trade off matches yours. Type 1 maximizes equivalence and pays in proving cost. Type 4 maximizes prover throughput and pays in compatibility. Everything else is a point on that line."
ZK rollup design principle, 2026
Frequently Asked Questions
What is a zkEVM?
A zkEVM is a zero knowledge rollup that executes Ethereum compatible smart contracts and generates cryptographic proofs of correct execution. The proofs are verified on Ethereum L1, giving the rollup the security of L1 with much lower fees and higher throughput.
What are the four zkEVM types?
Type 1 is fully Ethereum equivalent, Type 2 is fully EVM equivalent with bytecode compatibility, Type 3 is almost EVM equivalent with small differences, and Type 4 uses a custom virtual machine with high level language compatibility only.
Is Polygon zkEVM Type 2 or Type 3?
Polygon zkEVM is classified as Type 3 in production as of 2026, though the team has narrowed the differences from Ethereum L1 enough that it is sometimes described as Type 2.5. A handful of opcodes and the storage commitment scheme still differ from L1.
Why is zkSync Era Type 4 not Type 1?
zkSync Era uses a custom virtual machine called the zkVM that is designed to be cheap to prove rather than EVM compatible. Solidity is compiled to a custom intermediate representation, which gives zkSync the lowest proving costs but breaks bytecode level compatibility with Ethereum L1.
Which zkEVM has the lowest fees?
zkSync Era has the lowest fees among the three in 2026, with a typical swap costing $0.01 to $0.06. This is a direct consequence of the Type 4 design that lowers proving costs by an order of magnitude compared to Type 1 or Type 2 systems.
Which zkEVM is closest to Ethereum L1?
Among Polygon zkEVM, zkSync Era, and Scroll, the closest to Ethereum L1 is Scroll with its Type 2 bytecode equivalence. Outside this trio, Taiko aims for full Type 1 equivalence but with smaller production traffic.
Does zkSync support account abstraction?
Yes, zkSync Era supports account abstraction natively at the protocol level. Every account on the chain is effectively a smart contract account, which allows for gas in ERC 20s, sponsored transactions, custom signature schemes including passkeys, and atomic transaction batching.
Can I deploy an L1 contract to Scroll without changes?
In most cases yes. Scroll is bytecode equivalent with Ethereum L1, which means the same compiled contract that runs on L1 will run on Scroll. A handful of gas cost differences may affect contracts that hardcode gas amounts but the bytecode itself does not need recompilation.
What is the difference between zkEVM and optimistic rollup?
A zkEVM uses zero knowledge proofs to prove execution is correct, allowing fast L1 finality once the proof is verified. An optimistic rollup assumes execution is correct and only checks if challenged, which results in a seven day challenge period before withdrawals finalize.
How long do zkEVM withdrawals take?
Native zkEVM withdrawals to L1 take from fifteen minutes to about an hour depending on the chain and the current proving load. Third party fast bridges can complete withdrawals in seconds for a small fee by fronting the funds on L1.
Which zkEVM has the most TVL in 2026?
Among the three, zkSync Era leads on TVL in 2026, followed by Polygon zkEVM and then Scroll. Total value locked shifts often as protocols redeploy, so checking a live aggregator like DefiLlama gives the current ranking.
Are zkEVM tokens worth tracking?
POL, ZK, and SCR are the governance tokens for Polygon, zkSync, and Scroll respectively. Their prices tend to correlate with chain usage and L2 narrative cycles, and tracking them alongside chain TVL and daily transaction counts gives a useful read on which ecosystem is growing.
Track L2 tokens on DEXTools
Watch POL, ZK, and SCR price action in real time
L2 token flows are the cleanest signal for which zkEVM is gaining traction. Set alerts on the three governance tokens and watch TVL and DEX volume on each chain.
Open DEXTools L2 trackersRelated reading on DexTools News: Polygon zkEVM architecture deep dive, Scroll bytecode equivalent zkEVM explained, zkSync Era account abstraction guide, Taiko Type 1 zkEVM guide, and Linea ConsenSys zkEVM guide.