Skip to main content
High-Yield Savings Account Comparison

Ally Bank vs. Betterment

Ally Bank's Savings Account pays 3.00% APY while Betterment's Cash Reserve pays 4.00% APY.

See how they compare on rate stability, mobile app ratings, and more below.

Analysis by Aviel Fahl
Updated August 21, 2026

The Bottom Line

Who pays more interest on $10,000? Betterment pays $44 more than Ally Bank annually ($344 vs $300).

Choose Ally Bank if you want Zelle for quick transfers. Choose Betterment if getting the best rate matters most.

Comparison of Ally Bank vs Betterment savings accounts
Metric

Ally Bank

Savings Account

Aug 21, 2026

Betterment

Cash Reserve

Aug 21, 2026
APY3.00%3.25% - 4.00%
Est. Earnings
$5,000+$150
$10,000+$300
$25,000+$750
$5,000+$172
$10,000+$344
$25,000+$859
Min Deposit
$0$0

Snapshot view. Rates subject to change.

Features
FDIC InsuredNo MinimumsGreat iOS AppGreat Android AppZelle® SupportedDaily CompoundingRate Changes Often
FDIC InsuredNo MinimumsGreat iOS AppGreat Android App

Prefer In-Person Banking?

Both of these institutions are online-only. If you need in-branch access, check out our list of savings accounts with brick-and-mortar locations.

Find In-Branch Access

Comparison Analysis

Comparing Ally Bank vs. Betterment

Updated: Invalid Date

Executive Summary

A detailed summary for this comparison is being prepared. Check back soon.

The analysis is based on current Banksparency database records

* This content is provided for informational purposes only; always verify details with the provider.

Why Ally Bank?

  • Fast transfers via Zelle® (up to $5,000 a day)

Why Betterment?

  • Higher potential APY (4.00% vs 3.00%) on all balances
  • Higher rated Android app (4.7 vs 4.4)

Key Feature Differences

Better Returns at $10,000
Betterment

Betterment's Cash Reserve earns more on smaller deposits (approx. $344 vs $300/yr).

Better Returns at $25,000
Betterment

Betterment's Cash Reserve pulls ahead with larger amounts (approx. $859 vs $750/yr).

Best for Simplicity
Betterment

Betterment's Cash Reserve offers 4.00% APY with no bundling, direct deposit requirement or caps.

Best Mobile App Experience
Betterment

Betterment offers an iOS app rated 4.8 (vs. 4.7) and Android app rated 4.7 (vs. 4.4)

Shared Benefits

Both offer monthly maintenance-free account options Both banks have options with $0 opening deposit Available Nationwide Available to New & Existing Customers
The Bottom Line on APY (Interest Only)PROMO DETECTED

Over a 1-year period (factoring in a 3-month promo), Betterment's Cash Reserve pays $44 more interest on a $10,000 balance than Ally Bank's Savings Account.

*Betterment's calculation includes their 3-month introductory promotional rate and subsequent standard rate.

Ally BankBetterment
Verify At
Ally Bank

Non-sponsored link to official site

Verify At
Betterment

Non-sponsored link to official site

Top Market Contenders

Marcus by Goldman Sachs
3.40% APY
Capital One
3.50% APY

Ally Bank vs. Betterment Savings Calculator

Calculations based on current APY for Savings Account and Cash Reserve
$
$

You earn $45.1 more with Betterment than Ally Bank 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.

Ally Bank

Savings Account

3.00% APY

Savings Breakdown

  • Interest Earned
    +$300.00(2.9%)
  • Total Contributions
    $0
  • Initial Deposit
    $10,000

Projected Balance

$10,300.00

Effective APY
3.00%

Betterment

Cash Reserve

4.00% APY
Promo Rate: 4.00% for 3 months, then 3.25%.

Savings Breakdown

  • Interest Earned
    +$345.10(3.3%)
  • Total Contributions
    $0
  • Initial Deposit
    $10,000

Projected Balance

$10,345.10

Effective APY
3.45%

The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.

Still banking with Chase, Bank of America, or Wells Fargo?

On a $10,000 balance, you're missing out on at least $299 per year in interest.

Both Ally Bank and Betterment dramatically outperform the typical 0.01% APY at traditional big banks.

Big banks currently pay 0.01% APY on savings vs 3.00%+ here
See Top Rates
FeatureAlly BankBetterment
APY
3.00%
Verified: 8/21/2026
-
4.00%
Range: 3.25% - 4.00%
Verified: 8/21/2026
-
Product NameSavings AccountCash Reserve
Minimum Deposit$0$0
Min. Balance for APY$0$0
Monthly Fee$0$0
Compound FrequencyDailyN/A
In-Branch AccessNoNo
Account Type
Online Only
Online Only
Physical BranchesN/ANone
Direct Deposit Req.NoneNone
Checking BundleNoNo
Mobile Apps
iOS4.7
Android4.4
iOS4.8
Android4.7
FDIC or NCUA Insured
Yes
Zelle® Support
Available
Limit: $5,000/dayBenchmark for online Zelle; high limits.
Not Supported
BBB RatingA+A-
Next Steps
Visit Site

Non-sponsored link to official site

Visit Site

Non-sponsored link to official site

📈 Compare Savings Rates Over Time

Historical Performance

Last 7 Months Analysis
MetricAlly BankBetterment
Savings AccountCash Reserve
Current APY
3.00%4.00%
Trend
Stable Stable
Velocity (bps/mo)
-3.41.8
Days Since Change
79115
7-Month High
3.20%4.00%
7-Month Low
3.00%3.90%
Adjustments / Mo
0.290.14
Volatility Score
0.0270.013
How to read these metrics(Click to expand)

Trends & Velocity

  • Trend: The general direction of the rate over the analyzed period. Useful for spotting if a bank is currently aggressive or pulling back.
  • Velocity (bps/mo): Speed of change. A high positive number means they raise rates quickly. 10 bps = 0.10%.
  • Adjustments/Mo: "Twitchiness." High frequency means the rate changes constantly; low frequency means it's stable.

Risk & Range

  • High/Low: The absolute ceiling and floor of the rate during the 209-day window.
  • Volatility Score: Lower is better for predictability. It indicates how wildly the rate swings relative to its average.
  • Days Since Change: If this number is high (e.g., >90), the rate is very sticky. If low, it changed recently.

More Comparisons

Compare Ally Bank's APY of 3.00% with other banks
Compare Betterment's APY of 4.00% with other banks