RedotPay vs KAST
Two custodial Visa cards built for travel and broad merchant acceptance. RedotPay covers 100+ countries with no cashback; KAST has tiered cashback (1.5–6%) and 16-currency settlement with steep premium-tier fees.
Quick verdict
Different value propositions. RedotPay is the simpler payment utility — broad asset support, broad mobile-wallet coverage (Apple/Google/Samsung Pay), no cashback to optimise for. KAST is a tiered product — the no-annual-fee K Card gives you 1.5% cashback in SOL and 16-currency settlement; the premium tiers (Premium/Limited/Private at $1k–$10k/yr) only make sense for high spenders.
Side-by-side
| RedotPay | KAST | |
|---|---|---|
| FX Fees | ~1.2% FX + 1% crypto conversion at top-up | 0% USD · 2% other · +$0.10 low-value purchases |
| Payback | No standard ongoing cashback | 1.5% on K Card · 2%–3% on paid premium tiers |
| Annual Fee | $10 Virtual · $100 Physical | $2 Virtual · $1,000/yr Premium · $10,000/yr Private |
| Physical Card | Plastic Visa + virtual | Plastic + gold-metal Luxe at top tier |
| Custody | Custodial | Custodial |
| Supported Currencies | BTC, ETH, USDT, USDC, SOL + 20 more across many networks | Spends in 16 fiat (USD, EUR, GBP, SGD, JPY…) |
| Region | 100+ countries, 5M+ users | 170+ countries / 150M+ Visa merchants |
Verdict by dimension
Cashback
KAST wins — 1.5% on the base card, up to 6% on premium. RedotPay has no standard ongoing cashback.
FX Fees
KAST wins on US-base spending (0% USD). For other currencies, KAST's 2% is comparable to RedotPay's ~1.2% + 1% top-up.
Annual Fee
Tie at the base tier (RedotPay is no-annual-fee, KAST K Card is too). KAST premium tiers are very expensive.
Asset support
RedotPay wins — BTC, ETH, USDT, USDC, SOL + 20 more across many networks. KAST funds via stablecoins (USDT/USDC) only.
Mobile wallets
RedotPay supports Apple Pay, Google Pay, Samsung Pay. KAST's support is narrower.
Multi-currency settlement
KAST wins — 16 fiat. RedotPay settles in a narrower set.
Choose RedotPay if…
you want broad asset support (BTC + ETH + 20+ alts + multiple networks), don't care about cashback, and want Apple/Google/Samsung Pay support out of the box.
Choose KAST if…
you spend across multiple currencies (KAST settles in 16 fiat including USD, EUR, GBP, SGD, JPY), you want some cashback (1.5% on the free K Card; more on paid tiers), and you don't need the broad altcoin top-up support RedotPay offers.