Coinbase Card vs KAST
Head-to-head on the facts that decide your money - fee stacks, KYC, the bitcoin flow and limits.
Short answer: KAST wins overall (7.2/10 vs 6.7/10). The right pick still depends on your priority - see the flow comparison below.
 Coinbase Card |  KAST | |
|---|---|---|
| Overall score | 6.7 | 7.2 |
| BTC load | BTC via in-app conversion | BTC via in-app conversion |
| BTC sale timing | BTC sold per transaction | Not documented |
| KYC | Full KYC | Full KYC |
| Custody | Custodial | Custodial |
| Top-up fee | 0% | 0% |
| FX fee | not documented | 2% |
| Monthly fee | none | none |
| Cashback | none | 1.5% in USD |
| Regions | US | GLOBAL, US, EEA |
Pick Coinbase Card if
- Known fee stack (0.0 vs 2.0 % equivalents on a $500/mo profile)
Pick KAST if
- Higher documented cashback (1.5% vs none)
- Wider documented availability
Coinbase Card
The safest pair of hands in the comparison: NASDAQ-listed issuer context, FDIC-member bank card, zero fees on USD/USDC spending and no staking requirement. The trade-offs: US-only (no Hawaii), rewards rates are variable in-app only, and non-USDC crypto spends trigger auto-sell with spread and taxes.
KAST
The most complete stablecoin-spending account on the market: US/EU virtual bank accounts from anywhere, Visa Platinum cards with real 1.5% USD cashback on the free tier, instant cashback and no spending caps. Full KYC and a young operator are the trade-offs; the paid tiers only make sense for heavy spenders.