The Ethereum ecosystem
Everything on this page is built by third parties on top of the Ethereum protocol. Project names appear only as factual references to their official sites; sizes and rankings shift constantly, so treat the descriptors as approximate (October 2026) and check L2BEAT or DefiLlama for current standings.
Decentralized finance
DeFi protocols are open smart contracts that perform a financial function: anyone can use them, and any developer can build on them. Total value deposited peaked near $180 billion in late 2021 and has remained in the tens of billions since. The main categories:
Trading
Automated market makers such as Uniswap and Curve let assets trade against pooled liquidity instead of an order book; anyone can supply the liquidity and earn fees.
Lending
Markets such as Aave and Compound accept deposits and extend overcollateralized loans from them, with interest rates set by supply and demand.
Decentralized stablecoins
Maker (rebranded Sky in 2024) issues the long-running DAI stablecoin against collateral vaults; other designs replicate dollars natively or tokenize them.
Derivatives
Protocols including dYdX and GMX offer perpetual futures and synthetic exposure, either on fully on-chain engines or hybrid designs.
Staking liquidity
Liquid staking, with Lido the largest, wraps staked ETH into a tradable token, pairing staking rewards with liquidity; it is consistently among the protocol categories with the most value deposited.
Aggregation & routing
Meta-protocols compare prices across the above, split orders, and re-balance yield; they are the connective tissue that makes the composability real.
Layer-2 networks
Rollups execute transactions on their own chain and post data back to Ethereum. Optimistic rollups assume validity and rely on fraud proofs; validity (zero-knowledge) rollups prove correctness with every batch. Both inherit most of the base layer's security.
| Network | Type | Origin / ecosystem | Notes |
|---|---|---|---|
| Arbitrum One | Optimistic | Offchain Labs | Long-standing leader among rollups by activity and value |
| Base | Optimistic | Coinbase, OP Stack | Fast-growing consumer-oriented chain |
| OP Mainnet | Optimistic | Optimism, OP Stack | Template of the "Superchain" of OP Stack chains |
| zkSync Era | Validity | Matter Labs | Early zk-rollup with its own account-abstraction features |
| Starknet | Validity (STARKs) | StarkWare | Custom Cairo toolchain; strong validity-proof heritage |
| Scroll | Validity | Scroll | EVM-equivalent zk design |
| Linea | Validity | Consensys | Integrated with ConsenSys tooling |
| Polygon family | Sidechain and zk lines | Polygon Labs | Distinct security model from rollups; often listed separately |
Since Ethereum's 2024 blob upgrade moved rollup data into a cheaper lane, transaction costs on these networks typically run to cents or fractions of a cent, and a large share of all Ethereum-denominated activity now settles on them.
Token and account standards
Ethereum Improvement Proposals (EIPs) with an "ERC" number define the interfaces everything else agrees on.
| Standard | Defines | Why it matters |
|---|---|---|
| ERC-20 | Fungible tokens | Made every token interchangeable with every wallet and exchange |
| ERC-721 | Non-fungible tokens | The NFT standard behind collectibles, art and title-like assets |
| ERC-1155 | Multi-token contracts | One contract for many fungible and unique items, cheaper at scale |
| ERC-2981 | Royalty signaling | A standard way for NFTs to declare creator payouts |
| ERC-4626 | Vault accounting | Common share-price interface for yield vaults |
| ERC-4337 | Smart accounts | Account abstraction without protocol changes: batching, sponsorship, passkeys |
| ERC-6551 | Token-bound accounts | Gives an NFT its own wallet, and therefore its own history and belongings |
| EIP-7702 | Delegating EOAs | Regular accounts gain contract powers for a transaction (2025) |
Ways to stake
Solo staking
32 ETH, your own hardware or cloud, full rewards and no counterparty. The network's preferred mode; also the most demanding.
Pooled staking
Services such as Rocket Pool spread operation across many small deposits, with operator bonds aligning incentives.
Liquid staking
Lido and similar protocols issue a tradable token representing staked ETH; convenient, but the token carries its own smart-contract and liquidity risks.
Staking via exchanges
Centralized services offer one-click staking at the cost of custody. Simple, and the most trust-dependent of the options.
All non-solo forms trade some trust for convenience; the official staking pages compare the options and their risk profiles.
Identity and naming
The Ethereum Name Service (ENS) maps human-readable names such as example.eth to addresses and other records, and has become the ecosystem's de facto identity layer. Signature-based login (Sign-In with Ethereum) lets users authenticate to applications with a wallet instead of a password.
Developer tooling
Contract languages (Solidity, Vyper), frameworks (Foundry, Hardhat), TypeScript libraries (viem, ethers), testing and fuzzing integrated into the build chain, formal-verification tools, and a competitive market of node providers. Independent developer-count studies have repeatedly placed Ethereum's ecosystem first or near-first among open blockchain ecosystems, and the tooling reflects that maturity.