#arbitrum Tools

Rainbow is a self-custody Ethereum / EVM wallet built for people who want crypto to feel less like spreadsheet software. Mobile-first (iOS/Android), browser extension later. Strong NFT gallery, L2s out of the box (Base, Arbitrum, Optimism, Polygon, Zora, and more), swaps, bridges, ENS. Open source. ~0.85% fee on in-app swaps. No Bitcoin, no Solana. Best “pretty and usable” EVM wallet, not the deepest DeFi power tool or the widest multichain kitchen sink.

Safe{Wallet} (formerly Gnosis Safe) is the standard smart-contract multisig for Ethereum and EVM chains. Not a MetaMask clone. Your Safe is an onchain account controlled by M-of-N owners (e.g. 2-of-3, 3-of-5). Used for DAO treasuries, protocol ops, and high-value self-custody. Modules, spending limits, batching, Safe Apps. Open source. No product license fee. You pay gas. Secures on the order of $100B+ AUM in ecosystem claims. EVM-only. Misconfigured signers or shady modules can still wreck you.

Coinbase Wallet is Coinbase’s self-custody product, not the Coinbase exchange. You hold the keys. Mobile + browser extension for the classic seed-phrase wallet; newer Smart Wallet / Base Account uses passkeys and ERC-4337 instead of 12 words. Strong Base / Ethereum / L2 path, plus Solana and Bitcoin on the classic app. Easy hop from a Coinbase exchange balance into onchain dApps. Hot wallet. In-app swaps often ~1%. Coinbase cannot reset a lost seed or passkey backup.

Rabby is a DeBank-built, open-source self-custody wallet for Ethereum and 100+ EVM chains. Browser extension first, plus desktop and mobile. The killer feature is pre-sign transaction simulation: you see balance changes, approvals, and risk flags before Confirm. Auto network switching, approval revoke tools, scam-site warnings, Ledger/Trezor pairing. Built-in swap fee about 0.25% (cheaper than MetaMask’s ~0.875%). EVM-only. No Solana, no Bitcoin. Hot wallet made for people who actually sign DeFi txs every week.

Trust Wallet is a Binance-owned, mobile-first self-custody wallet built for breadth. One app for 100+ chains (BTC, ETH, BNB Chain, Solana, TRON, and a long tail), swaps, staking, NFTs, dApps, and fiat ramps. Extension exists for desktop. You hold the seed. Free to install. Costs show up as gas, swap spreads (~0.5–1% / often cited ~0.7%), and partner buy fees. Huge download base. Hot wallet. Fake apps and phishing are the daily danger. Best as a multichain Swiss Army knife, not the sharpest single-chain specialist.

MetaMask is the default self-custody wallet for Ethereum and most EVM dApps. Browser extension plus mobile, built by Consensys. You hold the keys (or a seedless / smart-account path). Connect to DeFi, NFTs, L2s. Built-in swaps, bridges, staking shortcuts, Portfolio dashboard, and Snaps for extra networks and tools. Unmatched “Connect Wallet” compatibility. Hot wallet risks and a 0.875% swap/bridge service fee are the usual tradeoffs.

Pendle is a DeFi yield marketplace. It takes a yield-bearing asset (stETH, sUSDe, aUSDC, and similar), wraps it, and splits it into PT (principal) and YT (future yield). Buy PT at a discount and hold to maturity for a fixed APY in the underlying. Buy YT if you want leveraged bets on that yield (and points/airdrops). Custom AMM prices the rates. Powerful interest-rate tooling. Easy to misuse. Not a simple “deposit and chill” farm.

Aave is the main DeFi money market. You supply crypto to earn interest or borrow against collateral you already deposited. No bank account. Wallet connects, smart contracts hold the pools. V3 runs on Ethereum plus many L2s (Arbitrum, Base, Optimism, and more). Rates move with utilization. Borrowers live or die by a Health Factor. Biggest lending protocol by TVL for years. Powerful, liquid, and unforgiving if you ignore liquidations.

Lido is Ethereum’s biggest liquid staking protocol. You deposit ETH, get stETH (or wrap to wstETH), and keep earning staking rewards without running a 32 ETH validator. stETH stays usable in DeFi: lend it, LP it, restake elsewhere. Fee is about 10% of rewards, not of your principal. Net APR floats with network conditions (often roughly low-to-mid 2% range in quieter 2026 stretches). Convenience king. Decentralization critics hate how large its share of staked ETH got.