American Express vs. Climate First Bank
American Express's High Yield Savings Account pays 3.00% APY while Climate First Bank's Super Duper Savings Account pays 4.01% APY.
See how they compare on rate stability, mobile app ratings, and more below.
The Bottom Line
Who pays more interest on $10,000? Climate First Bank pays $101 more than American Express annually ($401 vs $300).
Choose American Express if you're an iPhone user (no iOS app for Climate First Bank), or you're an Android user (no Android app for Climate First Bank). Choose Climate First Bank if getting the best rate matters most, BBB rating matters to you, or you value in-person banking.
| Metric | American ExpressHigh Yield Savings Account Sep 5, 2026 | Climate First BankSuper Duper Savings Account Sep 5, 2026 |
|---|---|---|
| APY | 3.00% | 4.01% |
Earns in a year | $5,000+$150 $10,000+$300 $25,000+$750 | $5,000+$200 $10,000+$401 $25,000+$1,002 |
Min. Deposit | $0 | $50 |
Snapshot view. Rates subject to change. | ||
| Features | FDIC InsuredNo MinimumsGreat iOS AppGreat Android AppZelle® SupportedDaily CompoundingRate Changes Often | FDIC InsuredLow MinimumsIn-Person AccessZelle® SupportedDaily CompoundingStable Rate |
Comparison Analysis
Comparing American Express vs. Climate First Bank
Executive Summary
Climate First Bank offers the Super Duper Savings Account with a competitive APY of 4.01%, making it the highest-yielding option compared to American Express's High Yield Savings Account, which has a lower APY of 3.00%. Climate First Bank's account requires a minimum deposit of $5,000 but has no direct deposit requirement, while American Express's account is online-only with no minimum deposit or maintenance fees. Additionally, Climate First Bank provides a Business Money Market account with an even higher APY of 4.26%, but it requires a primary business checking relationship. Overall, Climate First Bank presents better rates for savers.
The analysis is based on current Banksparency database records
* This content is provided for informational purposes only; always verify details with the provider.
Why American Express?
- Higher rated iOS app (4.9 vs 0.0)
- Higher rated Android app (4.8 vs 0.0)
Why Climate First Bank?
- Higher potential APY (3.56%-4.01% vs 3.00%) on all balances
- Physical branch access (3 locations in Florida (St. Petersburg, Mount Dora, Winter Park), and one coming soon in Orlando, FL)
- Offers 3 different high-yield savings options
Key Feature Differences
Better Returns at $10,000
Climate First BankClimate First Bank's Super Duper Savings Account earns more on smaller deposits (approx. $401 vs $300/yr).
Better Returns at $25,000
Climate First BankClimate First Bank's Super Duper Savings Account pulls ahead with larger amounts (approx. $1002 vs $750/yr).
Better for Simplicity
Climate First BankClimate First Bank's Super Duper Savings Account offers 4.01% APY with no bundling, direct deposit requirement or caps.
Better Mobile App Experience
American ExpressAmerican Express offers an iOS app rated 4.9 (vs. 0.0) and Android app rated 4.8 (vs. 0.0)
Shared Benefits
Over a 1-year period, Climate First Bank's Super Duper Savings Account pays $101 more interest on a $10,000 balance than American Express's High Yield Savings Account.
*This calculation assumes current rates remain consistent for 1 year and does not include temporary bonuses.
Non-sponsored link to official site
Non-sponsored link to official site
Top Market Contenders
American Express vs. Climate First Bank Savings Calculator
You earn $101 more with Climate First Bank than American Express on a $10,000 initial deposit for 1 year*.
*This calculation assumes that APYs remain unchanged for 1 year, and takes into account known promo rate periods, but does not factor in bonuses. You can see how often these banks have changed their rates in the Compare Savings Rates Over Time section below.
American Express
High Yield Savings Account
Savings Breakdown
- Interest Earned+$300.00(2.9%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,300.00
Climate First Bank
Super Duper Savings Account
Savings Breakdown
- Interest Earned+$401.00(3.9%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,401.00
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
Still at a large branch bank?
A typical branch-bank savings rate is 0.05% APY. On a $10,000 balance, the gap to these two banks is at least $295 a year in interest.
Both American Express and Climate First Bank advertise far more than that typical branch-bank rate.
| Feature | American Express | Climate First Bank |
|---|---|---|
| APY | 3.00% Observed: 9/5/2026 0.10%90-day change | 4.01% Observed: 9/5/2026 Stable over 90 days |
| Product Name | High Yield Savings Account | Super Duper Savings Account |
| Minimum Deposit | $0 | $50 |
| Min. Balance for APY | $0 | $0 |
| Monthly Fee | $0 | $0, if electronic statements selected, otherwise $5 |
| Compound Frequency | Daily | daily |
| In-Branch Access | No | Yes |
| Account Type | Online Only | Online & Branches |
| Physical Branches | 1 (UT) | 4 (FL) |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | ||
| FDIC or NCUA Insured | YesVerify FDIC | YesVerify FDIC |
| Zelle® Support | Available Requires Amex Rewards Checking; not available for standalone HYSA. | Available Verified in Climate First Bank Personal app. |
| BBB Rating | F | A+ |
| Next Steps | Visit SiteVerify at American Express Non-sponsored link to official site | Visit SiteVerify at Climate First Bank Non-sponsored link to official site |
Compare Savings Rates Over Time
Historical Performance
| Metric | American Express | Climate First Bank | |
|---|---|---|---|
| High Yield Savings Account | Business Money Market | Super Duper Savings Account | |
Current APY | 3.00% | 4.26% | 4.01% |
Trend | Stable | Stable | Stable |
Speed of change | -0.05 | -0.03 | -0.02 |
Days Since Change | 57 | 149 | 190 |
9-Month High | 3.40% | 4.51% | 4.21% |
9-Month Low | 3.00% | 4.26% | 4.01% |
Changes per month | 0.42 | 0.11 | 0.11 |
Steadiness | 0.026 | 0.023 | 0.009 |
How to read these metrics(Click to expand)
Trends and speed
- Trend: The general direction of the rate over the analyzed period. Useful for seeing whether a bank is raising its rate or letting it slip.
- Speed of change: How fast the rate moves. A high positive number means they raise rates quickly. A reading of 0.10 is a tenth of a percentage point each month.
- Changes per month: How often the rate moves. A high number means it changes constantly; a low number means it holds.
Risk & Range
- High/Low: The absolute ceiling and floor of the rate during the 284-day window.
- Steadiness: How far the rate swings around its average. A lower score means a steadier, more predictable rate.
- Days Since Change: A high number, for example above 90, means the rate rarely moves. A low number means it changed recently.
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High Rates (With Checking Bundle)
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More Comparisons
Compare American Express' APY of 3.00% with other banks
Compare Climate First Bank's APY of 4.01% with other banks
| Bank Pair | Competitor APY | Min Deposit |
|---|---|---|
| Climate First Bank vs Ally Bank | 3.00% | $0 |
| Climate First Bank vs Axos Bank | 4.21% | $0 |
| Climate First Bank vs Barclays | 3.65% | $0 |
| Climate First Bank vs Capital One | 3.50% | $0 |
| Climate First Bank vs Chime | 3.75% | $0 |
| Climate First Bank vs CIT Bank | 3.75% | $100 |
| Climate First Bank vs EverBank | 3.90% | $0 |
| Climate First Bank vs Marcus by Goldman Sachs | 3.40% | $0 |
| Climate First Bank vs Newtek Bank | 4.20% | $100 |
| Climate First Bank vs Openbank | 3.80% | $500 |
| Climate First Bank vs Pibank | 4.10% | $0 |
| Climate First Bank vs SoFi Bank | 4.00% | $0 |
| Climate First Bank vs Synchrony Bank | 3.30% | $0 |
| Climate First Bank vs Varo Bank | 3.75% | $0 |
| Climate First Bank vs Wealthfront | 3.95% | $0 |