KAST vs Nexo
Two custodial cards. KAST settles in 16 fiat with tiered cashback; Nexo is free with Credit/Debit modes, 40+ collateral assets and loyalty-tier rewards.
Quick verdict
Both are custodial. KAST is the multi-currency spender's card — 16-fiat settlement, 1.5% free / up to 6% paid — but premium tiers are expensive. Nexo is free with more financial flexibility: Credit Mode borrows against 40+ collateral types, Apple and Google Pay, cashback up to 2% in NEXO or 0.5% in BTC, strongest in Europe.
Side-by-side
| KAST | Nexo | |
|---|---|---|
| FX Fees | 0% USD · 2% other · +$0.10 low-value purchases | EEA/UK 0.2%–0.7% · RoW 2%–2.5% (≈0% at Gold+) |
| Payback | 1.5% on K Card · 2%–3% on paid premium tiers | Up to 2% NEXO or 0.5% BTC (Credit mode) |
| Annual Fee | $2 Virtual · $1,000/yr Premium · $10,000/yr Private | Free — no monthly/annual/inactivity fees |
| Physical Card | Plastic + gold-metal Luxe at top tier | Virtual + physical (physical needs ≥$5k & Gold tier) |
| Custody | Custodial | Custodial |
| Supported Currencies | Spends in 16 fiat (USD, EUR, GBP, SGD, JPY…) | 40+ cryptos accepted as collateral |
| Region | 170+ countries / 150M+ Visa merchants | EEA, UK + select European countries |
Verdict by dimension
Annual Fee
Nexo wins — free. KAST's rewarding tiers cost $1,000–$10,000/yr.
Cashback
Close at the base (KAST 1.5%, Nexo up to 2%); KAST's 6% needs costly tiers, Nexo's 2% needs NEXO holdings.
FX Fees
Region-dependent — KAST 0% USD / 2% other; Nexo tiered, ≈0% at Gold+ in Europe.
Flexibility
Nexo wins — Credit/Debit and 40+ collateral vs KAST's stablecoin funding.
Settlement
KAST wins — 16 fiat currencies.
Choose KAST if…
you spend across many fiat currencies and want native settlement.
Choose Nexo if…
you want a free card with Credit/Debit modes and broad collateral, and you're in Europe.