Base: Coinbase's Layer 2 — Everything You Need to Know

Introduction

Base holds 38.1% of all value secured on Ethereum layer 2 (L2) chains, yet the chain Coinbase runs has no token, one sequencer and no exit window for upgrades (L2BEAT, 2026). L2BEAT, the research site that rates L2s and renamed itself ETHBEAT on 4 November 2026, measured $14.79B of value secured on Base at 09:00 UTC on 5 November 2026, with about 94 transactions per second. Older guides still call Base an OP Stack chain, and Base announced in February 2026 that it was moving to its own stack. This guide sets out who runs Base, what changed in the software, what the chain costs to use, how its size is counted, and which plans have shipped. Every figure names its source and date, because the measures differ.

What Is Base, Who Runs It, and How Secure Is It?

Base is an Ethereum layer 2 (L2) that Coinbase builds and runs (Base, 2023). On 5 November 2026 L2BEAT rated it Stage 1 while listing no exit window for upgrades, and marked its Base page as under review (L2BEAT, 2026). A large, well-rated chain operated by one company is the fact to hold through the rest of this guide.

Built by Coinbase, open to any developer

Coinbase incubated Base inside the company and opened its testnet in February 2023, with the aim of giving Coinbase's onchain products a home and letting anyone build there (Base, 2023). Mainnet opened to all users on 9 August 2023 (CoinMarketCap Academy, 2023), and Jesse Pollak, Base's creator, now leads the chain full time (The Block, 2026). Ethereum is the layer 1; Base is a layer 2 that runs transactions itself and posts their data to Ethereum. The split between layer 1 and layer 2 blockchains ↗ decides what Base inherits from Ethereum and what it does not. The Coinbase exchange ↗ is a separate product that connects to Base.

One sequencer, Stage 1 and instant upgrades

Base runs a single active sequencer, the operator that orders transactions, and publishes preliminary Flashblocks every 200 milliseconds until Denim, an upgrade set for 18:00 UTC on 5 November 2026, replaces them with five canonical blocks per second (Base documentation, 2026). L2BEAT rates Base Stage 1: only a 75% supermajority of its Security Council can override the proof system, and users can force a transaction through Ethereum with a delay of up to 12 hours if the sequencer stalls. The exit window is none, because the Base Coordinator Multisig and the Base Security Council can upgrade contracts instantly (L2BEAT, 2026). Stage 1 measures decentralization, not protection from bugs (L2BEAT, 2025).

Data current as of November 2026.

The software behind that profile changed in 2026, and 2023-era guides still describe the old one.

Did Base Leave the OP Stack, and Why Does L2BEAT Still Tag It That Way?

Base announced on 18 February 2026 that it was moving from the OP Stack to its own stack, and its first independent upgrade, Azul, went live on 28 May 2026 (Base Engineering Blog, 2026; Base documentation, 2026). L2BEAT still labels Base "Built on OP Stack" because Base stays compatible with the OP Stack specification.

Announced in February, completed with Azul in May

The announcement, "A new, unified stack for Base Chain", pulled the sequencer and other components, once spread across Optimism, Flashbots and Paradigm repositories, into one repository, base/base, built on open-source components such as Reth (Base Engineering Blog, 2026). Base gave three reasons: shipping six smaller hard forks a year instead of three, a codebase one developer can understand, and earlier delivery of Ethereum changes ↗. Base said it stays Stage 1 and adds an independent signer to its Security Council in place of Optimism. Azul reached the Base Sepolia testnet on 20 April and mainnet on 28 May 2026 at 18:00 UTC. It supports only Base's own execution and consensus clients, and it added a dual-proof path using trusted execution environments (TEE) and zero-knowledge (ZK) proofs, with one-day finalization (Base documentation, 2026). Beryl followed on 25 June and Cobalt on 30 September, both on the new stack, and Denim, live on Sepolia since 21 October, is scheduled for mainnet on 5 November 2026.

What the OP Stack tag still means after the split

The announcement says Base remains compatible with the OP Stack specification, including optimism-namespace RPCs, which is why L2BEAT's badge still reads "Built on OP Stack" on 5 November 2026 (Base Engineering Blog, 2026; L2BEAT, 2026). The business tie did end. Base had committed the greater of 2.5% of gross sequencing revenue or 15% of its L2 profit to the Optimism Collective, with a 9% cap on its voting power. Optimism's governance forum states that the prior Superchain revenue share "will not continue" and that Base is not entitled to the unvested part of its OP token grant. Base remains a customer of Optimism's OP Enterprise support service, and that revenue goes to the Optimism Foundation (Optimism governance forum, 2026). The 9% voting cap still applies to Base.

Data current as of November 2026.

Leaving Optimism's code did not give Base a network token.

Does Base Have a Token, and What Does a Transaction Cost?

Base has no network token as of 5 November 2026. It said on 15 September 2025 that it was "beginning to explore" one and has announced nothing since in the sources checked (Decrypt, 2025; Base, 2026). Gas is paid in ETH.

No network token, and what Base has said

Base's official account wrote on 15 September 2025 that it was "beginning to explore a network token", in "early phases" with no specifics on timing, design or governance, and Coinbase added that Base "has no definitive plans" (Decrypt, 2025). That reversed earlier statements that Coinbase did not plan to issue one. On 5 November 2026 Base's documentation lists ETH as its currency, and neither base.org nor Base's 2026 strategy post mentions a token (Base, 2026). Any later launch would change this, so every statement about it needs a date. Gas in ETH means no Base token is needed to use the chain. Coinbase warns that scammers offer fake Base tokens (Coinbase Help, 2026).

Fees are paid in ETH: what Base cost on 5 November 2026

Every Base transaction pays gas in ETH (Base documentation, 2026). At 09:00 UTC on 5 November 2026 growthepie's median fees on Base were $0.0003 for an ETH transfer and $0.0034 for a token swap, against $0.0067 and $0.0610 on Ethereum (growthepie, 2026). A direct quote at 10:53 UTC for a 21,000-gas transfer came to $0.00031, of which under 1% paid for posting data to Ethereum (public RPC endpoints, 2026). In the seven days to 4 November 2026 Base paid Ethereum $8.6K of the $625K its users paid in fees, or 1.4%, most of it on 29 October, when Ethereum's own fees spiked (growthepie, 2026). Why L2 fees are so low ↗ is a separate mechanism; how Ethereum gas fees are set ↗ explains the price Base is cheaper than.

L2BEAT and DeFiLlama measure the value behind those low fees in different ways.

How Big Is Base, and What Runs on It?

Base held $14.79B of value secured at 09:00 UTC on 5 November 2026, 38.1% of the $38.77B L2BEAT tracks across 83 layer 2 projects, a total that leaves out layer 3s such as Hyperliquid, and processed about 94 transactions per second over the week to 4 November. DeFiLlama counts $6.21B of TVL and $5.01B in stablecoins on Base, and each figure measures something different.

Value secured, activity and TVL count different things

Value secured is L2BEAT's count of assets bridged to, minted on or held natively on an L2; Base's $14.79B splits into $6.82B native, $2.88B canonically bridged and $5.09B externally bridged (L2BEAT, 2026). Activity averaged about 94 transactions per second over 29 October–4 November, against about 21 on Ethereum and 14 on Arbitrum One (L2BEAT, 2026). Value secured is not limited to assets deployed in DeFi. TVL is DeFiLlama's count of funds locked in DeFi contracts, and it stood at $6.21B on 5 November, against $45.82B on Ethereum (DeFiLlama, 2026); Pollak had cited an all-time high of $5.7B on 10 September (Jesse Pollak on X, 2026). Arbitrum One is second at $9.61B of value secured; a head-to-head of Arbitrum, Optimism and Base ↗ and a ranking of the largest layer 2s by value ↗ are covered in separate articles.

Stablecoins and lending carry Base DeFi

Dollar-pegged stablecoins on Base total $5.01B on DeFiLlama, against $3.34B on Arbitrum (DeFiLlama, 2026). L2BEAT's breakdown makes stablecoins the largest single category of Base's value secured at $4.90B, ahead of BTC-linked tokens at $4.13B, other tokens at $3.24B and ether at $2.38B. Morpho Blue, a lending protocol, lists $4.58B on Base, the largest single protocol there, and Aave V3 lists $0.55B. Pollak said on 7 October 2026 that Base offers 32 stablecoins across 21 currencies (The Block, 2026), and Base reports $17T of stablecoin volume in 2025 (Base, 2026).

Aerodrome leads exchange volume

Aerodrome is a decentralized exchange (DEX) native to Base, and its developer, Dromos Labs, set 21 October 2026 to fold it and Velodrome into one exchange named Aero (Crypto Briefing, 2026). DeFiLlama lists the new Aero pools beside the original Aerodrome ones, and their Slipstream pools together processed $690M of the $1.40B traded on Base DEXs in the 24 hours to 5 November 2026, or 49%. Curve followed at $513M, after about $0.5M the day before, and Uniswap V3 at $239M (DeFiLlama, 2026). Aero Slipstream and Aerodrome Slipstream list $0.11B and $0.08B of TVL on Base. Base DEXs traded $7.75B over seven days. One day of volume moves with the market, so the ranking is a snapshot.

Data current as of November 2026.

Which of Base's plans have shipped is a separate question from what it holds.

Where Is Base Heading, and How Are Funds Moved onto It Safely?

Base's 2026 strategy sets three focuses: global markets, payments and stablecoins, and builders. Those are plans. Azul, Beryl and Cobalt, tokenized stocks and the wallet rename have shipped. Funds reach Base by one of four routes, and leaving takes one to five days.

Plans, the Coinbase Wallet rename and what is unconfirmed

Base's 31 March 2026 strategy lists privacy primitives, native account abstraction and agent-native smart accounts as work still to come (Base, 2026). Coinbase launched tokenized stocks on Base in August 2026 (The Block, 2026). On 10 September 2026 Coinbase renamed the Base App back to Coinbase Wallet, which now supports more than 10 networks, and Pollak said "Base" will name the chain and its ecosystem (The Block, 2026). Pollak puts Base's 2027 focus on trading, payments and financing, and reported about $70M to $100M of daily trading in Coinbase's 50 listed tokenized stocks on 7 October 2026 (The Block, 2026).

Routes onto Base and the exit window

Base's documentation lists four routes: withdraw ETH or USDC from a Coinbase account and select Base as the network, bridge from Ethereum with Superbridge or Brid.gg, use the Base–Solana bridge, or send Bitcoin through Garden to receive cbBTC (Base documentation, 2026). A deposit from Ethereum is an ordinary Ethereum transaction and pays Ethereum's gas price. The old bridge.base.org is deprecated, and the documentation advises checking each ERC-20 token address and testing with a small amount first. Leaving takes longer than arriving: the dispute-game window is five days on the single-proof path and one day on the dual-proof path (Base documentation, 2026).

FAQ

?What happens to funds on Base if its sequencer goes offline?

Base runs a single active sequencer (Base documentation, 2026). L2BEAT lists the sequencer-failure response as self-sequencing: a user can send a transaction through Ethereum and force its inclusion, with a delay of up to 12 hours (L2BEAT, 2026). Funds stay on the chain during an outage, and the force-inclusion path is the exit route if ordinary transactions stall.

?Can a wallet that works on Ethereum be used on Base without a new address?

Base is a standard Ethereum Virtual Machine (EVM) chain, so any Ethereum wallet, tool or library works unchanged. The network details are chain ID 8453, remote procedure call (RPC) endpoint mainnet.base.org, ETH as the currency and basescan.org as the explorer (Base documentation, 2026). An Ethereum address is valid on Base, and the balance on each chain is separate.

?Is Base a sidechain?

No. L2BEAT classifies Base as an optimistic rollup, with state validation through fraud proofs ↗ and data posted onchain to Ethereum as blobs (L2BEAT, 2026). A sidechain runs its own validators and posts no data to Ethereum. L2BEAT lists Polygon PoS, for contrast, with no state validation and its own proof-of-stake network for data.

?How long does a withdrawal from Base to Ethereum take?

Base's documentation sets the dispute-game window at five days on the single-proof path and one day on the dual-proof path, which combines a trusted execution environment and a zero-knowledge proof. Beryl cut the single-proof window from seven days to five on 25 June 2026 (Base documentation, 2026). Third-party fast bridges can shorten the wait at a fee.

?Can people in the United States trade Coinbase's tokenized stocks on Base?

Base's own page describes the stocks as issued by Coinbase and available to eligible non-US users (Base, 2026). Coinbase launched them in August 2026 on the B20 standard. Availability depends on the user's country and eligibility, so the Coinbase product page is the place to check before trading.

?Where can a reader check Base's current security status and upgrade dates?

L2BEAT's Base page shows the stage, proof system, exit window and who can upgrade contracts. Base's documentation keeps an upgrades page with Sepolia and mainnet activation dates for Azul, Beryl, Cobalt and Denim, and marks any month without a confirmed timestamp as a planning target (L2BEAT, 2026; Base documentation, 2026).

?Does having no token make Base less decentralized than L2s that have one?

L2BEAT's stages measure proof systems, Security Council powers and exit windows, not tokens (L2BEAT, 2025). On 5 November 2026 Base, Arbitrum One and OP Mainnet were all Stage 1, and the other two have tokens (L2BEAT, 2026). A token gives holders governance rights where a protocol offers them, but it adds no stage by itself.

?What is B20, and why does Base use it for stablecoins and stocks?

B20 is Base's native token standard, introduced with the Beryl upgrade on 25 June 2026. It builds issuer controls into the chain: allowlists, memos, pausing, and multipliers that adjust displayed balances for events such as stock splits. Cobalt added composite policies that combine allowlists and blocklists (Base documentation, 2026). Coinbase's tokenized stocks use B20 (Base, 2026).

References / Sources