Base Chain: Coinbase's L2 and the Risks of Building on Someone Else's Infrastructure

Base launched on August 9, 2023, and grew faster than most L2s had grown before it.

By mid-2024, Base was regularly processing more daily transactions than Ethereum mainnet. That's not a small thing. The chain was built by Coinbase using the OP Stack — the same open-source infrastructure that powers Optimism — and it quickly attracted significant DeFi activity, native USDC issuance, and integration with Coinbase Wallet that gave it built-in user distribution most L2s have to earn.

The growth numbers look impressive. The underlying questions are worth unpacking.

**Why Base grew quickly**

Coinbase has roughly 100 million verified users. When you build a chain and integrate it as a first-class option in your existing exchange and wallet app, you solve the cold-start problem that kills most new networks. Base's early adoption was partly organic and partly the result of being placed in front of an existing user base.

The OP Stack integration meant Base launched with a working developer toolchain, existing bridge infrastructure, and a codebase that the broader Ethereum development community already understood. Aerodrome Finance, a fork of Velodrome (itself a fork of Solidly), became Base's dominant DEX and a significant source of on-chain activity. The ecosystem built out quickly because Coinbase made it easy to build there.

**What "Coinbase's L2" actually means**

Base is operated by Coinbase as a Stage 0 rollup — which means the chain has no permissionless withdrawal path. If Coinbase's sequencer (the single node that orders transactions) goes down, or if Coinbase decides to censor your transaction, your options are limited. The security council that could override this is controlled by Coinbase.

The Ethereum L2 community has a framework for this: Stage 0, Stage 1, and Stage 2 rollups, where Stage 2 represents full decentralization with no upgrade keys and no trusted parties. Base is Stage 0. It's run by a company with a $3+ billion annual revenue stream, a regulatory relationship with the SEC, and US government exposure.

This isn't necessarily a fatal objection. Using a centralized service is a trade-off most crypto users make every day. But "Coinbase's L2" means Coinbase's rules — including, in principle, transaction censorship if regulators ever required it.

**The sequencer revenue question**

Rollups capture sequencer revenue — the margin between the L1 data costs they pay to post transactions to Ethereum and the fees they charge users. In Base's case, this revenue accrues to Coinbase.

Coinbase disclosed that Base generated approximately $900 million in sequencer revenue for fiscal year 2024. That's significant revenue from infrastructure that is marketed as part of the "decentralized" Ethereum ecosystem.

This isn't inherently problematic — companies need revenue — but it does clarify what Base is: a product that generates margin for Coinbase, built on open-source infrastructure that the broader community maintains. Coinbase contributes to the OP Stack, which is part of the deal. Whether that contribution outweighs the centralization risk is a question each user answers for themselves.

For ordinary transaction throughput at low fees, Base works well. For use cases where censorship resistance or sovereignty over your assets actually matters, the architecture deserves scrutiny.

Base Chain: Coinbase's L2 and the Risks of Building on Someone Else's Infrastructure

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