
KASTKAST
84
Side-by-side card comparison
ether.fi Cash Card has the higher Overall Score by 3 points (87 vs 84). KAST Card looks stronger for Travel, Lowest fees, and Transfers, while ether.fi Cash Card comes out ahead for Cashback and Funds control.
01 · Overall score versus use-case fit
ether.fi Cash Card has the higher Overall Score in this comparison. KAST Card may be the better fit for Travel, Lowest fees, and Transfers. A score cannot tell you whether a provider will accept your application or whether every feature will be available where you live, so check the latest provider terms before signing up.

KAST Card comes out ahead for Travel, Lowest fees, and Transfers in this comparison. It is worth a closer look if those are the parts of a card you expect to use most.

ether.fi Cash Card comes out ahead for Cashback and Funds control in this comparison. It is worth a closer look if those are the parts of a card you expect to use most.
The overall leader does not win every use case, so the reason you want the card matters here.
ether.fi Cash Card has the higher Overall Score by 3 points.
ether.fi Cash Card has the lower published FX fee (0–0.2% vs 0.5–1.75%).
ether.fi Cash Card has the higher published base cashback rate (3% vs 1.5%).
KAST Card uses a custodial balance setup, while ether.fi Cash Card uses a non-custodial account setup. Neither approach is always better, so choose the level of control you are comfortable with.
Both cards list the same number of card formats and phone-wallet options.
KAST Card lists more stablecoins and ways to send money out (12 vs 9).
02 · Read the shortlist
Start with the strengths that drive each use-case result, then test them against costs and access.
Current signup offers
A welcome offer can improve the value of your first months with a card. Check the eligibility rules, qualifying actions and deadline first. Signup offers are excluded from card scores.
20% off your first subscription
Offer terms can change. Check the current KAST referral programme before signing up.
We do not currently list an active signup offer for this card.
Partner links may earn us a commission. Read our affiliate disclosure for how these links work.
03 · Compare the details
Comparable figures receive a marker; missing or unverified details stay visible instead of becoming an assumed advantage.
KAST CardOverall84
ether.fi Cash CardOverall8704 · The trade-off
ether.fi Cash Card finishes ahead with an Overall Score of 87 versus 84 for KAST Card. ether.fi Cash Card has the lower published FX fee (0–0.2% vs 0.5–1.75%). ether.fi Cash Card has the higher published base cashback rate (3% vs 1.5%).
KAST Card still comes out ahead for Travel, Lowest fees, and Transfers, which may matter more than the overall result if that is how you plan to use the card. KAST Card uses a custodial balance setup, while ether.fi Cash Card uses a non-custodial account setup. Neither approach is always better, so choose the level of control you are comfortable with.
KAST Card lists more stablecoins and ways to send money out (12 vs 9). Before applying, confirm availability in your country and recheck the provider's current fees and reward conditions.
If one card now looks like the better fit, you can check the latest application terms on the provider site or read our full KAST Card and ether.fi Cash Card reviews first.


05 · Common questions
ether.fi Cash Card has the higher Overall Score (87 vs 84). That does not make it better for everyone: your preferred fees, rewards, way of holding funds and country availability can change the practical choice.
ether.fi Cash Card has the lower published FX fee (0–0.2% vs 0.5–1.75%). Compare plan, FX, card-spend, top-up and ATM charges separately because one fee does not represent the full cost.
ether.fi Cash Card has the higher published base cashback rate (3% vs 1.5%). Maximum rates may depend on tiers, caps, categories or other conditions, so the entry rate and reward asset matter too.
KAST Card uses a custodial balance setup, while ether.fi Cash Card uses a non-custodial account setup. Neither approach is always better, so choose the level of control you are comfortable with.
The latest information check for these two cards was August 28, 2026, using 39 official sources in total. Each full card review lists its own check date, sources and anything the provider has not clearly disclosed.