Ally Bank vs. Bmo Alto
High-Yield Savings Account Comparison
By Aviel Fahl|Last Updated: November 12, 2025
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Summary of Ally Bank vs. BMO Alto
Key Metrics at a Glance
| Feature | Ally Bank | BMO Alto |
|---|---|---|
| Top Savings APY | 3.30% Savings Account | 3.25% Savings Account |
| Minimum to Open | $0 | $0 |
| Minimum Balance for Top APY | $0 | $0 |
Ally Bank
Strengths
- Ally Bank offers a higher APY of 3.30% compared to BMO Alto's 3.25%.
- Ally Bank has a higher App Store rating of 4.7 versus BMO Alto's 4.3.
- Both banks have no maintenance fees or minimum balance requirements.
Potential Drawbacks
- Ally Bank's APY decreased from 3.40% over the last 30 days.
- Ally Bank has no branches, similar to BMO Alto.
BMO Alto
Strengths
- BMO Alto is BBB Accredited, indicating additional trustworthiness.
- BMO Alto's APY remained stable at 3.25% over the last 30 days.
Potential Drawbacks
- BMO Alto's APY of 3.25% is lower than Ally Bank's 3.30%.
- BMO Alto has a lower App Store rating of 4.3 compared to Ally Bank's 4.7.
→ 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 BMO Alto's 3.25% APY for its Savings Account, with a minimum balance of $0.
→ Ally Bank yields $5 more than BMO Alto on a $10,000 balance after one year. Ally Bank pays $330, while BMO Alto pays $325 - an APY advantage for Ally Bank.
Calculate Savings Growth for Ally Bank vs BMO Alto
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 OverviewBMO Alto - Savings Account
Total savings breakdown:
- Interest earned: $1,955.5 (9.80%)
- Total contributions: $13,000 (65.14%)
- Initial deposit: $5,000 (25.06%)
Your total balance
$19,955.50
Total balance: $19,955.5
Earnings: $1,955.5
Bank OverviewWith a $5,000 initial deposit and $13,000 in total contributions over 5 years, Ally Bank's total earnings would be $31.6 higher than BMO Alto's total earnings.
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
Compare Ally Bank's vs BMO Alto's Savings Accounts
| Ally Bank | BMO Alto | ||
|---|---|---|---|
| Product | Savings Account | vs | Savings Account |
| APY | 3.30% (as of 11/12/2025) | 3.25% (as of 11/12/2025) | |
| Bundled Account | No | No | |
| FDIC-insured | Yes | Yes | |
| Online Only | Yes | Yes | |
| Compound Frequency | Daily | Daily | |
| Minimum Deposit | $0 | $0 | |
| Minimum Balance for APY | $0 | $0 | |
| Maintenance Fee | $0 | $0 | |
| Direct Deposit Required | No | No | |
| App Store Rating | 4.7/5 | No | |
| Google Play Rating | 4.3/5 | No | |
| BBB Rating | A+ | A+ |
Comparative Historical APY Insights (Last 9 Months)
| Ally Bank | BMO Alto | ||
|---|---|---|---|
| Product | Savings Account | vs | Savings Account |
| Latest APY | 3.30 % | 3.25 % | |
| Trend | Sideways | Falling | |
| Slope (bps/mo) | -4.1 | -7.2 | |
| Rate Changes / Mo | 0.52 | 0.52 | |
| Days Since Last Change | 13 | 55 | |
| High (-9 m) | 3.80 % | 4.10 % | |
| Low (-9 m) | 3.30 % | 3.25 % | |
| Draw-down from High | -13.2 % | -20.7 % | |
| Volatility (CV) | 0.035 | 0.062 |
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 289 days.
- Low (-9 m)
- Lowest APY in the last 289 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.