Ether.fi
The DeFi neo-bank built on restaking.
What it is
Ether.fi began as a liquid-restaking protocol and is becoming a full DeFi neo-bank. Its three products map to a bank: Stake = savings, Liquid = investing, Cash = a crypto credit card that lets you spend against staked assets without selling them.
How it works
- Stake: deposit ETH for liquid (re)staking yield — the 'savings account'.
- Liquid: curated yield strategies — the 'investment account'.
- Cash: a card/smart wallet that borrows against staked assets to spend.
Differentiators
- Spend against staked ETH without unwinding the position.
- Three stacked products create stickiness + multiple revenue lines.
- Native, self-custodial DeFi origin vs. fiat-bank bolt-on.
Business model
Staking fees + card interchange + borrowing spread.
Depends on
- Ethereum staking/restaking (EigenLayer)
- Card issuer
- Stablecoin liquidity
Risks
- Smart-contract + restaking risk.
- Crypto-collateral volatility against card spend.
The product lines
Stake
Liquid restaking — the 'savings account'.Deposit ETH, BTC, or stablecoins and receive a value-accruing liquid restaking token (weETH, eBTC, eUSD). The underlying is restaked to help secure Ethereum infrastructure (via EigenLayer / Symbiotic), so you keep exposure to the asset while earning staking + restaking rewards — and the receipt token stays liquid and composable across 400+ DeFi protocols.
- Deposit ETH → mint weETH (value-accruing; rewards compound into the token's redemption value, not a rebasing balance).
- Deposit BTC → eBTC; deposit stablecoins → eUSD. All are redeemable for the underlying staked asset.
- Underlying is restaked on EigenLayer / Symbiotic to secure networks and capture restaking yield + points.
- Tokens plug into DeFi: trade (Bitget), collateral (Aave), fixed yield (Pendle), leverage (Gearbox).
Liquid
Automated strategy vaults — the 'investment account'.Deposit into a strategy vault and it auto-deploys across the best DeFi protocols, auto-balances, and auto-compounds. A 'set-and-forget' yield layer built on Veda's BoringVault architecture, with optional Nexus Mutual coverage.
- Pick a vault by asset/goal (Liquid ETH Yield, Liquid USD, Liquid BTC Yield, Liquid Reserve).
- Strategists rebalance across protocols but can ONLY move assets among positions pre-encoded in the vault smart contract — they cannot withdraw.
- Only the user can deposit or withdraw; earnings auto-compound inside the vault.
- Withdrawals queue (72h on most vaults; 7 days on weETHs Super Symbiotic) as a safety mechanism.
Cash
DeFi-native, non-custodial credit card — the 'spending account'.A non-custodial cashback card (launched Apr 2025) that lets you spend against your ether.fi portfolio without selling. Borrow against staked/value-accruing collateral, repay anytime with no monthly minimum. Up to 3% cashback, 0% FX on EUR/USD, Apple/Google Pay, 100M+ locations. Issued by a third-party Issuer — not affiliated with the ether.fi protocol.
- Fund from fiat (bank transfer / personal IBAN) or any non-custodial wallet; spend value-accruing stables.
- Borrow-to-spend against collateral instead of selling assets; cashback credits instantly to the account.
- Tiered membership ('The Club': Core → Luxe → Pinnacle → VIP) unlocked by Membership Points — higher tiers raise the cashback cap and add lounge/concierge/insurance perks.
- Corporate cards: issue to a team with treasury assets as collateral.
Architecture & mechanics
Vault architecture (Veda BoringVault)
Liquid and the Super Symbiotic LRT run on Veda's BoringVault pattern. The vault token itself is the share; a set of role-separated contracts surrounds it so no single actor can rug depositors.
- BoringVault — holds assets and is the share token users receive.
- Teller — the only entry/exit point; mints on deposit, burns on withdraw.
- Accountant — prices the share (exchange rate), driving value-accrual.
- Lens — read-only helper for quoting balances/rates.
- Strategists are constrained to a whitelist of positions encoded in the contract; only users move funds in/out.
Restaking & points stack
Deposits are restaked on EigenLayer / Symbiotic to secure networks. Symbiotic only accepts deposits up to a per-asset cap, and only capped deposits earn points until caps are raised — so routing through ether.fi's vault batches deposits and stacks multiple point programs at once.
- Direct Symbiotic deposit → Symbiotic points only.
- Via Super Symbiotic (weETHs) → Symbiotic points + ether.fi points + Veda points.
- Holder earns the composite staking rate of all yield-bearing assets in the vault (~ the eETH ~3% base, blended).
Delegation chain & added risk (weETHs example)
A portion of weETHs collateral is delegated beyond pure restaking to chase extra yield, which layers in counterparty risk. The Cap Protocol allocation routes funds through a real-world credit chain:
- Flow: Symbiotic → Cap Protocol → M11 Credit (borrower) → Pareto Vault → FalconX prime brokerage.
- Slashing risk: excessive loan LTV can partially/fully slash delegated funds (loss of principal).
- Counterparty risk: FalconX (end borrower) or M11 Credit failing to return capital.
- Protocol risk: bugs/exploits in Cap Protocol or the Pareto vault.
- Liquidity risk: redemption depends on underlying loan terms; weETHs has a 7-day withdrawal window.
Security posture
- Audited by Macro and Spearbit (boring-vault audit repo); active bug bounty.
- Chaos Labs risk monitoring; open-source on GitHub; decentralized operator set.
- Non-custodial throughout — users retain control of deposits and card collateral.