Base is an Ethereum Layer 2 network built by Coinbase, the US-listed crypto exchange. It processes transactions on its own chain and publishes the data to Ethereum, which keeps fees low while relying on Ethereum for security. Coinbase announced Base in February 2023 and opened the mainnet to the public on August 9, 2023. The Base website is the official starting point for users and developers.
How Base Works
Base launched as an optimistic rollup. The idea works like this.
- Users send transactions to a sequencer, a server that orders them and produces blocks roughly every two seconds.
- The sequencer batches the transactions and posts the compressed data to Ethereum.
- The network treats the batches as valid by default. If someone believes a posted result is wrong, they can challenge it during a dispute window.
- Because the data is on Ethereum, anyone can rebuild the state of Base and check it.
The ethereum.org documentation on optimistic rollups explains the model in detail. The term "optimistic" refers to the assumption that batches are honest unless proven otherwise.
Base is compatible with the Ethereum Virtual Machine. Contracts written for Ethereum can be deployed on Base with little or no change, and the same wallets work on both.
The OP Stack and Optimism
Base was built with the OP Stack, the open-source rollup software developed for Optimism. At launch, Coinbase joined Optimism's Superchain plan, a group of chains sharing the same code and standards, and agreed to contribute a share of Base's sequencer revenue to the Optimism Collective.
Rollup software changes quickly, and the Base team now does much of its own engineering. For the current technical design, check the Base documentation instead of relying on older descriptions.
Who Controls Base
Coinbase operates the sequencer. That gives it control over transaction ordering and the ability, in principle, to delay or censor transactions. Users keep a safeguard: they can submit transactions through Ethereum directly if the sequencer refuses to include them, though that route is slower and more expensive.
Upgrades to the network's contracts are controlled by a security council and multi-signature arrangements, not by an open vote. Base has added permissionless fault proofs, which let anyone challenge an invalid state claim, but it is still more centralized than Ethereum itself. Coinbase has said it intends to decentralize the network further over time.
Does Base Have a Token?
Base launched without a native token, and gas fees are paid in ETH. For its first two years, Coinbase said it had no plans to issue one. In September 2025, the Base team said it had begun exploring a network token, without committing to a design or a date.
Scammers regularly promote fake "Base tokens" and fake airdrops. Treat any token claiming to be the official Base token as suspect unless it is announced through Base's or Coinbase's official channels.
Fees and Performance
Fees on Base are far lower than on Ethereum mainnet. A swap or transfer usually costs a few cents or less, though fees rise when the network is congested.
Costs dropped sharply after Ethereum's Dencun upgrade in March 2024. That upgrade introduced blobs, a cheaper way for rollups to publish data on Ethereum. Blob data is stored by Ethereum nodes for a limited time instead of forever, which is why it costs less.
Transactions on Base confirm within seconds. Full settlement on Ethereum takes longer.
Moving Funds In and Out
- Coinbase: customers can send ETH, USDC and other supported assets directly to Base from their exchange account.
- Official bridge: deposits from Ethereum arrive within minutes. Withdrawals back to Ethereum through the standard bridge take about seven days because of the dispute window.
- Third-party bridges: faster, but they add their own smart contract and liquidity risk.
Sending funds to Base from an exchange that does not support the Base network is a common way to lose them. Confirm the network on both sides before any transfer.
What People Use Base For
- Decentralized exchanges: Aerodrome is the largest DEX built for Base, and Uniswap is also deployed there.
- Stablecoin payments: Circle issues USDC natively on Base.
- Lending: protocols such as Aave and Morpho operate on the network.
- Consumer and social apps: Base has pushed on-chain social and creator applications.
- Meme coins and new tokens: low fees make Base a busy venue for speculative tokens, most of which lose their value.
Friend.tech, a social app that drove a burst of activity on Base in 2023, later wound down.
How Base Compares
Base competes with Arbitrum, OP Mainnet, zkSync and other Layer 2 networks. Its main advantage is distribution. Coinbase can send its own customers to Base from the exchange and from its wallet app. The trade-off is reliance on a single company, which is subject to US regulation and makes the key operating decisions.
Risks to Understand
- Centralized sequencer: an outage at the sequencer stops normal activity. Base has had short outages.
- Upgrade risk: the parties that control upgrades could introduce a bug or be compromised.
- Smart contract risk: applications on Base can be hacked like those on any chain.
- Bridge risk: bridged assets depend on the bridge contracts.
- Token scams: anyone can launch a token on Base, and many new tokens are created to defraud buyers.
- Withdrawal delay: the standard exit to Ethereum takes about a week.
Nothing in this article is financial advice.
Key Base Facts
- Developer: Coinbase
- Announced: February 2023
- Public mainnet: August 9, 2023
- Type: Ethereum Layer 2 rollup, launched on the OP Stack
- Gas token: ETH
- Standard withdrawal time to Ethereum: about seven days
Track on CoinMarketGuy
Gas on Base is paid in ETH, and the Ethereum price page shows the live price, market cap and chart. The DEX page lists active liquidity pools with volume and liquidity, including pools on Base.