Ally Bank vs. Openbank
High-Yield Savings Account Comparison
By Aviel Fahl|Last Updated: November 12, 2025
We earn a commission if you open an account through some links on this page.
Summary of Ally Bank vs. Openbank
Key Metrics at a Glance
| Feature | Ally Bank | Openbank |
|---|---|---|
| Top Savings APY | 3.30% Savings Account | 4.20% High-Yield Savings Account |
| Minimum to Open | $0 | $500 |
| Minimum Balance for Top APY | $0 | $0 |
Ally Bank
Strengths
- Ally Bank offers a competitive APY of 3.30%, though it decreased from 3.40% in the last 30 days.
- Ally Bank has a strong BBB rating of A+.
Potential Drawbacks
- Ally Bank has no physical branches.
Openbank
Strengths
- Openbank provides a higher APY of 4.20%, unchanged from 30 days ago.
- Openbank has no maintenance fees.
Potential Drawbacks
- Openbank is not BBB accredited and has no BBB rating.
- Openbank has a lower App Store and Google Play rating of 3.2.
→ As of November 12, 2025 Ally Bank offers an APY of 3.30% for its Savings Account, with a minimum balance of $0, compared to Openbank's 4.20% APY for its High-Yield Savings Account, with a minimum balance of $0.
→ Openbank yields $90 more than Ally Bank on a $10,000 balance after one year. Ally Bank pays $330, while Openbank pays $420 - an APY advantage for Openbank.
Calculate Savings Growth for Ally Bank vs Openbank
Ally Bank - Savings Account
Total savings breakdown:
- Interest earned: $1,987.1 (9.94%)
- Total contributions: $13,000 (65.04%)
- Initial deposit: $5,000 (25.02%)
Your total balance
$19,987.10
Total balance: $19,987.1
Earnings: $1,987.1
Bank OverviewOpenbank - High-Yield Savings Account
Total savings breakdown:
- Interest earned: $2,564.3 (12.47%)
- Total contributions: $13,000 (63.22%)
- Initial deposit: $5,000 (24.31%)
Your total balance
$20,564.30
Total balance: $20,564.3
Earnings: $2,564.3
Bank OverviewWith a $5,000 initial deposit and $13,000 in total contributions over 5 years, Ally Bank's total earnings would be $577.2 lower than Openbank's total earnings.
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
Compare Ally Bank's vs Openbank's Savings Accounts
| Ally Bank | Openbank | ||
|---|---|---|---|
| Product | Savings Account | vs | High-Yield Savings Account |
| APY | 3.30% (as of 11/12/2025) | 4.20% (as of 11/12/2025) | |
| Bundled Account | No | No | |
| FDIC-insured | Yes | Yes | |
| Online Only | Yes | Yes | |
| Compound Frequency | Daily | Monthly | |
| Minimum Deposit | $0 | $500 | |
| Minimum Balance for APY | $0 | $0 | |
| Maintenance Fee | $0 | $0 | |
| Direct Deposit Required | No | No | |
| App Store Rating | 4.7/5 | 3.2/5 | |
| Google Play Rating | 4.3/5 | 3.2/5 | |
| BBB Rating | A+ | Not Rated |
Comparative Historical APY Insights (Last 9 Months)
| Ally Bank | Openbank | ||
|---|---|---|---|
| Product | Savings Account | vs | High-Yield Savings Account |
| Latest APY | 3.30 % | 4.20 % | |
| Trend | Sideways | Sideways | |
| Slope (bps/mo) | -3.9 | -4.0 | |
| Rate Changes / Mo | 0.46 | 0.35 | |
| Days Since Last Change | 13 | 114 | |
| High (-9 m) | 3.70 % | 4.75 % | |
| Low (-9 m) | 3.30 % | 4.20 % | |
| Draw-down from High | -10.8 % | -11.6 % | |
| Volatility (CV) | 0.030 | 0.028 |
APY Insights Glossary
- Latest APY
- Most recent advertised annual-percentage yield.
- Trend
- Direction over the last 9 months (regression slope).
- Slope (bps/mo)
- Average monthly change; 10 bps = 0.10 pp.
- Rate Changes / Mo
- Typical number of APY moves per month.
- Days Since Last Change
- Recency of the latest APY adjustment.
- High (-9 m)
- Highest APY in the last 260 days.
- Low (-9 m)
- Lowest APY in the last 260 days.
- Draw-down from High
- How far today sits below the 9-month peak.
- Volatility (CV)
- Coefficient of variation = stdev ÷ mean.
Why Track Savings-Account APYs?
- See how quickly a bank reacts to Fed moves or competition.
- Gauge “twitchiness” - frequent moves can annoy savers.
- Spot if you're buying near a peak (draw-down) or riding a rise.
- Slope (bps/mo) shows speed of change.
- Volatility (CV) scales jumps by average level.