Acorns vs Stash vs Betterment (2026)

Acorns pioneered the round-up micro-investing concept. Link your debit or credit card, and Acorns automatically rounds up every purchase to the nearest dollar and invests the difference. Spend $3.75 on coffee — Acorns invests $0.25. You can also set recurring daily, weekly, or monthly deposits. Portfolios range from conservative (mostly bonds) to aggressive (mostly stocks) based on a short questionnaire. No individual stock picking — Acorns invests in a handful of diversified ETFs.

Why we picked it for beginners:

The round-up mechanism removes the biggest barrier to investing: starting. You never have to decide to invest — it happens automatically every time you spend. "Found Money" partner rewards add another layer by crediting cash back into your Acorns account when you shop at participating brands.

• Round-up investing requires zero active decisions — spending = saving
• "Found Money" partner rewards: cash back invested automatically
• IRA included with Personal ($3/mo) plan
• SIPC insured — securities protected up to $500K
• Family plan ($5/mo) includes custodial accounts for kids (Acorns Early)
• No individual stock or ETF picking — automated portfolios only
• $3/month flat fee is expensive at very small balances (36% annually on $100)
• No tax-loss harvesting

Stash blends investing with financial education. Unlike Acorns, Stash lets you browse and buy fractional shares of individual stocks and ETFs — you can invest as little as $0.01 in companies you recognize. The Stash debit card earns "Stock-Back" rewards: use it at Amazon and earn fractional Amazon shares, use it at Walmart and earn Walmart shares. Stash Growth ($3/month) covers most investors; Stash+ ($9/month) adds 2x Stock-Back rewards and market insights.

Why we picked it for learners:

Stash is the only one of the three that teaches you investing through doing. Guided suggestions help you understand risk without overwhelming you, and the Stock-Back rewards make your spending feel like an investing lesson rather than a fee.

• Fractional shares — buy any stock starting at $0.01
• Stock-Back debit card: earn fractional shares when you spend
• Educational content built into the app — teaches investing as you go
• IRA available on all plans
• SIPC insured
• No automatic round-ups — you must actively invest (unlike Acorns)
• No tax-loss harvesting
• Stash+ at $9/month is expensive relative to what it adds

Betterment is a robo-advisor, not a micro-investing app — but it competes directly with Acorns and Stash for beginner investors who want automation. There is no monthly fee, just 0.25% annually on your balance (or 0.40% for Premium at $100K+ with human advisor access). Betterment builds and rebalances ETF-based portfolios automatically and is the only one of the three to offer tax-loss harvesting on taxable accounts. No individual stock picking — you choose a goal and Betterment handles the rest.

Why we picked it for fee efficiency:

Betterment is almost always cheaper than Acorns or Stash on a pure fee basis. At $5,000, you pay $12.50/yr vs $36/yr. Tax-loss harvesting adds further value in taxable accounts — a feature neither Acorns nor Stash offers.

• 0.25%/yr fee — no flat monthly charge, cheapest at most balance levels
• Automatic tax-loss harvesting on taxable accounts
• Goal-based investing: retirement, safety net, general wealth building
• IRA + Roth IRA + joint accounts available
• SIPC insured
• Premium tier ($100K+): adds human advisor access at 0.40%/yr
• No round-ups or spare-change investing
• No individual stock or ETF picking — ETF portfolios only
• No debit card or spending-based rewards