Mantle is a modular Layer 2 network that settles to Ethereum, uses EigenDA for data availability, and runs a custom optimistic rollup execution layer. It launched mainnet in July 2023 after the BitDAO community (treasury seeded by Bybit) voted to merge BIT into a new token, MNT. The same treasury later launched mETH, a liquid staking token that has become one of the largest ETH LSTs by total value locked.
If you have heard of Mantle in the context of cheap ETH transactions, mETH yield, or the giant Bybit-aligned treasury, this guide explains how the pieces fit. It covers the modular architecture, MNT and mETH, the live ecosystem (Init Capital, Pendle, Lendle, Agni), how Mantle compares to Arbitrum, Optimism, Base, and Linea, and the centralization and EigenDA-dependency risks you should weigh before bridging funds.
What is Mantle in one sentence?
Mantle is a modular optimistic rollup secured by Ethereum, with data availability outsourced to EigenDA, governance and gas paid in MNT, and a treasury-operated liquid staking token called mETH. It is one of the few L2s where the chain operator also runs a major DeFi product on top of the chain.
How does Mantle's modular architecture work?
Most L2s are "monolithic" rollups: execution, settlement, and data availability all happen inside the same stack. Mantle splits these jobs across separate systems, which is what "modular" means here.
Execution: Mantle runs an EVM-compatible optimistic rollup. Transactions execute on Mantle's sequencer, and fraud proofs anchor to Ethereum.
Settlement: Final state commitments post to Ethereum L1, so withdrawals inherit Ethereum security after the challenge window.
Data availability: Instead of posting full transaction data to Ethereum (the expensive part), Mantle posts data to EigenDA, an EigenLayer-secured DA layer. This is the single biggest reason Mantle fees are lower than Arbitrum or Optimism on equivalent transactions.
The tradeoff is straightforward. Posting calldata or blobs to Ethereum gives you Ethereum-grade data availability guarantees. Posting to EigenDA gives you cheaper fees, but the safety of withdrawals partly depends on EigenDA operators continuing to serve the data honestly. Mantle's docs at docs.mantle.xyz describe this as a deliberate cost/security tradeoff.
Where did Mantle come from? BitDAO, Bybit, and the BIT to MNT migration
Mantle's origin is unusual for an L2. The treasury behind it started life as BitDAO, a DAO seeded in 2021 with a large contribution from the Bybit exchange. In 2023 the community passed BIP-21, merging BitDAO into Mantle and converting BIT tokens to MNT at 1:1. The result is an L2 where the underlying treasury holds billions of dollars in assets, much of it stablecoins, MNT, and ETH.
That treasury is what makes Mantle different from other "VC-launched" L2s. It funds ecosystem grants, market making, mETH operations, and protocol-owned liquidity. Bybit's announcements at the time of the migration framed Mantle as the on-chain home for that treasury.
What is MNT and what does it do?
MNT is the native token of Mantle. It plays two roles:
Gas: Transactions on Mantle pay fees in MNT, not ETH. This is one of the few L2s that uses its own token for gas rather than bridged ETH.
Governance: MNT holders vote on Mantle Improvement Proposals (MIPs), including treasury deployment, parameter changes, and ecosystem grants.
MNT supply was set by the BIT to MNT conversion plus an additional issuance authorized in BIP-21. Current circulating and total supply are tracked on the Mantle docs and on major data feeds. Because gas is paid in MNT, every transaction on the chain creates a small amount of structural MNT demand, similar to how BNB works on BNB Chain.
What is mETH, and why is it different from Lido stETH?
mETH is Mantle's liquid staking token for ETH. You deposit ETH, you receive mETH, and mETH accrues staking rewards. Under the hood, the Mantle treasury runs the validators and the staking infrastructure. This is the part that makes mETH structurally different from Lido's stETH or Rocket Pool's rETH.
Lido stETH: A permissionless set of node operators, governed by LDO holders.
Rocket Pool rETH: A permissionless network of individual node operators with bonded RPL.
Mantle mETH: Operated by the Mantle treasury and its chosen operators, with the L2 itself integrating mETH as a primary DeFi asset.
The pitch is that the L2 and the LST are aligned. The risk is that mETH inherits the centralization properties of the Mantle Foundation rather than the wider Ethereum staking set. EigenLayer integrations have made mETH a popular restaking primitive as well, which is part of why its TVL grew quickly. Check current mETH TVL on DeFiLlama's Mantle and liquid-staking pages.
How big is the Mantle ecosystem?
Mantle's DeFi ecosystem is concentrated around money markets, perps, and yield products that route through mETH or treasury-backed stablecoin liquidity.
Init Capital: A money market with hooked liquidity and isolated pools.
Pendle: Yield tokenization, with mETH and other Mantle assets as core markets.
Lendle: Aave-style lending market, one of the earliest Mantle deployments.
Agni: Concentrated-liquidity DEX, the main spot venue on Mantle.
Mantle Network products: mETH, plus newer treasury initiatives like Mantle's stablecoin and index products.
For live TVL by protocol, DeFiLlama's Mantle dashboard is the canonical source. Treat the rankings as a snapshot, not a fixed list. New protocols deploy regularly and incentives shift the leaderboard.
How does Mantle compare to Arbitrum, Optimism, Base, and Linea?
The short version: Mantle is the cheapest of the EVM L2s in this group on a per-transaction basis, because of EigenDA. It is also the most concentrated in terms of operator and treasury control.
L2 | Type | DA layer | Gas token | Native LST | Notable risk |
Mantle | Optimistic rollup | EigenDA | MNT | mETH (treasury-run) | Sequencer + EigenDA dependency |
Arbitrum | Optimistic rollup | Ethereum (blobs) | ETH | None native | Sequencer centralization |
Optimism | Optimistic rollup | Ethereum (blobs) | ETH | None native | Fault proofs still maturing |
Base | Optimistic rollup (OP Stack) | Ethereum (blobs) | ETH | None native | Coinbase-operated sequencer |
Linea | zkEVM rollup | Ethereum | ETH | None native | ConsenSys-operated prover/sequencer |
If you care most about cost, Mantle wins on like-for-like swaps. If you care most about inherited Ethereum data-availability guarantees, the Ethereum-DA rollups (Arbitrum, Optimism, Base, Linea) are stricter. For a deeper head-to-head on the two largest of those, see support/en/articles/15183711. For other modular and zk options, see support/en/articles/15183705 and support/en/articles/15183713.
What are the main Mantle use cases?
Two stand out today. First, cheap EVM transactions: swaps, perps, and routine DeFi positions cost a fraction of what they cost on Ethereum mainnet, and meaningfully less than on Arbitrum or Optimism when the network is congested. Second, ETH yield through mETH: holding mETH on Mantle, looping it in Init Capital or Lendle, or tokenizing the yield on Pendle is the dominant on-chain trade.
Other use cases include treasury-aligned stablecoin liquidity, EigenLayer restaking points strategies, and NFT and gaming experiments funded by Mantle grants. For users coming from a yield-only L2 thesis, the closest peer is Blast. See support/en/articles/15183702 for that comparison.
What are the risks of using Mantle?
There are three risk buckets worth naming explicitly.
Sequencer centralization: The Mantle Foundation operates the sequencer. Like every major L2 today, this means a single party can in principle censor or reorder transactions in the short term. Withdrawals via the L1 escape hatch remain available, but they are slow.
EigenDA dependency: Data availability lives on EigenLayer-secured operators, not Ethereum directly. EigenDA has worked well in practice, but it is younger than Ethereum DA and adds an operator set that has to behave honestly.
mETH and treasury concentration: The same entity runs the chain and one of its largest DeFi products. That alignment cuts both ways. It funds growth and it concentrates the failure modes.
None of these are unique to Mantle. Base has Coinbase-operated infrastructure. Linea has ConsenSys. The honest framing is that Mantle trades a small amount of DA decentralization (EigenDA vs Ethereum) for materially lower fees, and you should bridge accordingly.
How do you get started on Mantle?
Add the Mantle network to your wallet (RPC details are at docs.mantle.xyz), bridge ETH or USDC via the canonical Mantle bridge or a third-party route, and acquire MNT on the destination for gas. From there, mETH is mintable directly through Mantle's staking interface, and most major DeFi venues (Agni, Lendle, Init, Pendle) are one click from a wallet that holds mETH or USDC. For cross-chain USDC specifically, CCTP is the cleanest path; see our guide at /support/en/articles/14998923.
Methodology and sources
This article draws on Mantle's official documentation (docs.mantle.xyz) for architecture, MNT mechanics, and mETH design. TVL and ecosystem rankings reference DeFiLlama's Mantle dashboard. EigenDA architecture references EigenLayer documentation. BitDAO history, the BIP-21 BIT to MNT migration, and treasury structure reference Bybit's 2023 announcements and the Mantle governance forum. Comparison points for Arbitrum, Optimism, Base, and Linea reference each project's docs and L2BEAT risk profiles. All figures should be treated as point-in-time; check DeFiLlama for current numbers.