⚖️ Comparison Tool: Free & Instant

Compare Any Two ETFs Side by Side.

Plain-English BFF Takes, overlap scores, and real dollar cost breakdowns, so you can see what actually matters and decide for yourself.

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💡 BFF Take included
🔢 Overlap Score
💵 Dollar cost impact
No signup required Plain-English explanations Updated data 130+ ready-made comparisons

Two ETFs can look identical and still cost you thousands of dollars apart over time. Pick any two funds above for an instant breakdown, or jump to one of our 133 ready-made comparisons below. Every one shows the expense ratio gap, how much the funds actually overlap, and the real dollar cost over 30 years, in plain English.

How to Compare Two ETFs

  1. Start with the expense ratio. It is the annual fee baked into the fund. The cheapest broad-market ETFs charge 0.03%; a 0.75% fund costs 25 times more every year you hold it. See how expense ratios compound.
  2. Check how much they overlap. Two funds can hold 90%+ of the same stocks. Owning both then adds cost and complexity, not diversification.
  3. Look past one-year returns. Judge funds across a full market cycle, not a hot streak. Past performance does not guarantee future results.
  4. Run the 30-year cost. A fee gap that looks tiny today compounds into thousands of dollars on a real balance. Every comparison below shows it in real dollars, or run the fee calculator for your numbers.

📂 Browse All ETF Comparisons

🏛️ S&P 500 & Large Cap 9
🌐 Total Market 6
🚀 Growth 6
💵 Dividend & Income 14
📦 Small Cap & Factor 10
💻 Tech & Growth 13
📊 Sector & Thematic 24
🌍 International 8
📈 Bonds 10
🏦 Cash & T-Bills 3
⚡ Alternatives & Leveraged 15
🔱 Three-Way Comparisons 15

Deciding between three similar funds? See all three side by side.

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BFF Take
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How to read results: Better / Lower cost Equal or N/A Higher cost / lower return Green cells = winner for that metric
🔄 Overlap Score
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💰 Cost Difference
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🎯 Who Should Choose Which?
💡 Real Dollar Impact: What Does the Cost Difference Actually Cost You?
* Assumes fees compound annually on growing balance. This is illustrative, not financial advice.
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Want to see how both ETFs fit inside your full portfolio? Run a free Portfolio Analysis →

Frequently Asked Questions

What is the difference between SPY and VOO?

SPY and VOO both track the S&P 500 index, but VOO has a lower expense ratio (0.03% vs SPY's 0.0945%) and a smaller bid-ask spread, making it cheaper for long-term buy-and-hold investors. SPY has higher trading volume and liquidity, which can make it preferable for active traders. Compare SPY vs VOO in full →

What is an ETF overlap score?

An overlap score measures how many holdings two ETFs share. A high overlap score (90%+) means the ETFs hold mostly the same stocks, so owning both provides little additional diversification. Our comparison tool calculates this score to help you avoid redundant positions.

Is VTI better than VOO?

VTI tracks the entire US stock market (including small and mid-cap stocks), while VOO tracks only the S&P 500 (large-cap). VTI offers broader diversification across roughly 3,500 stocks. Both have the same 0.03% expense ratio. VTI is generally preferred by investors who want full US market exposure. Compare VTI vs VOO in full →

How do I compare two ETFs side by side?

Use the comparison tool at the top of this page: type two tickers, then click Compare. You will see a side-by-side breakdown of expense ratios, performance, holdings overlap, 30-year cost impact in real dollars, and a plain-English BFF Take on the key differences.

What does a 30-year fee cost comparison mean?

The 30-year fee cost shows the total fees you would pay, including compounding opportunity cost, over 30 years based on your investment amount. For example, investing $10,000 in a 0.03% ETF versus a 0.75% fund could cost you thousands of dollars more over three decades. Run your numbers in the fee calculator →