Fidelity vs Vanguard: Which Is Better in 2026?
Fidelity and Vanguard are the two firms most long-term investors compare when they care about low costs and index funds. Both are giants with rock-bottom fees, deep mutual-fund lineups, and strong retirement coverage. The differences come down to platform quality, fractional shares, and how much you value active-trading tools. Below is an honest, balanced look as of 2026, plus where Walnut fits as an AI investing layer on top of either.
At a glance
| Fidelity | Vanguard | Walnut (on top) | |
|---|---|---|---|
| Stock & ETF commissions | $0 | $0 | Same, Walnut routes orders to your broker |
| Fractional shares | Yes, any stock/ETF (down to $1) | Vanguard ETFs only (no individual stocks) | Yes, uses broker fractional support |
| Index fund expense ratios | Zero-fee ZERO funds (0.00%) | Famously low (VOO 0.03%, VTI 0.03%) | Walnut focuses on stocks + ETFs |
| Mutual funds | Thousands, many no-fee | Thousands, index-fund pioneer | Walnut focuses on stocks + ETFs |
| Platform & app quality | Modern, well-rated apps | Functional, historically dated | AI assistant reads your live positions |
| Research & screeners | Deep, multiple providers | Minimal (discourages active trading) | AI assistant + web search |
| Cash management | CMA with competitive sweep yield | Settlement fund (money market) sweep | Inherits broker |
| Built-in AI assistant | Insights, not conversational chat | No conversational AI | Full agentic AI with your live positions |
| Trade execution from Walnut | Read-only tracking via SnapTrade | Tracking via SnapTrade (where supported) | Connect for tracking, AI on top |
| SIPC insurance | Yes, up to $500K | Yes, up to $500K | Not applicable, Walnut doesn't custody assets |
Costs & index funds
This is the headline matchup, and it's closer than the reputations suggest. Vanguard invented the low-cost index fund and its ETFs (VOO, VTI) sit at famously low expense ratios. Fidelity answers with its ZERO funds (FZROX, FNILX, and others) that charge a literal 0.00% with no minimum. For a buy-and-hold portfolio, the cost difference between the two is negligible.
Both charge $0 on US stock and ETF trades. If absolute lowest cost on a core index holding is your single priority, Fidelity's zero-fee funds technically win; in practice either is excellent.
Fractional shares & flexibility
Fidelity is the clear winner on flexibility. Its Stocks by the Slice feature covers nearly any US stock or ETF down to $1. Vanguard offers fractional investing only on its own ETFs, not on individual stocks. If you want to assemble a diversified portfolio of individual companies with small dollar amounts, Fidelity is the only one of the two that makes that easy.
Platform, app & usability
Fidelity has invested heavily in its web and mobile experience, and it shows: the apps are modern, well-rated, and quick to navigate. Vanguard's interface has historically been the weak point, functional but dated, though it has been modernizing. For investors who log in often, Fidelity is simply more pleasant to use; for those who check in a couple of times a year, the gap matters less.
Research & active trading
Fidelity offers deep third-party research, strong screeners, real-time quotes, and Active Trader Pro for those who want them. Vanguard deliberately keeps research and trading tools minimal, its whole philosophy nudges investors toward low-cost, buy-and-hold index ownership rather than active trading. That's a feature if it matches your style and a limitation if it doesn't.
Account types & retirement
Both are about as complete as US brokers get for long-term investors: every flavor of IRA, 529 plans, and robust retirement tooling. Fidelity adds a widely praised HSA and a strong cash-management account; Vanguard is the go-to for the index-and-target-date-fund retirement crowd. Either can hold your full retirement picture for decades.
Where Walnut fits in
Walnut isn't a broker; it sits on top of one. You connect your existing account (via the regulated SnapTrade integration) and Walnut adds a layer neither Fidelity nor Vanguard has: an AI assistant that can see your full portfolio, build thematic stock baskets in conversation, run drift analysis, and answer questions like “which of my positions is dragging returns this month?” using your live holdings.
Fidelity connects to Walnut for read-only tracking, so you keep trading in Fidelity while Walnut adds the AI layer. Vanguard support via SnapTrade varies; where it's available, it works the same read-only way. Either way, your money stays exactly where it is.
Try Walnut on top of your broker
Connect any major US broker in a few clicks. Walnut adds AI research, basket-building, and live portfolio answers, without changing where your money lives.
FAQ
How does Fidelity work?
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Fidelity is a full-service broker where you can hold a brokerage account, IRAs, a 529, an HSA, mutual funds, and cash management in one place. You fund it from a bank and trade stocks and ETFs commission-free, plus thousands of mutual funds. It offers deep research, fractional shares of nearly any stock down to $1, and zero-expense index funds. Fidelity notably does not sell equity order flow.
How much does Fidelity charge?
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Fidelity charges $0 commission on US stocks and ETFs and $0.65 per options contract. Many index funds carry very low expense ratios, and its ZERO funds charge 0.00%. There is no minimum for a standard brokerage account, and small regulatory fees apply to sells.
How does Vanguard work?
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Vanguard is the firm that pioneered low-cost index investing, and it's structured to be client-owned, which keeps fund costs at-cost. You fund a brokerage or retirement account from a bank and invest in its famously cheap index funds and ETFs (VOO, VTI), plus stocks and ETFs commission-free. Its tools are intentionally minimal because its philosophy favors long-term, buy-and-hold ownership.
How much does Vanguard charge?
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Vanguard charges $0 commission on US stocks and ETFs. Its index funds and ETFs carry some of the lowest expense ratios anywhere (VOO and VTI are around 0.03%). Account service fees are generally waived with electronic delivery of documents. As always, small regulatory fees apply to sells.
How do Fidelity and Vanguard make money?
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Both earn mainly from fund expense ratios, net interest on cash, advisory and managed-account services, and securities lending. Vanguard's client-owned structure means it runs funds close to at-cost. Neither relies on trading commissions, which is why both offer $0 stock and ETF trades.
Is Fidelity or Vanguard better?
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Both are excellent low-cost giants, and for buy-and-hold index investing the costs are nearly identical. Fidelity is the better all-rounder thanks to a modern platform, any-stock fractional shares, and zero-fee funds. Vanguard is the purest index shop with rock-bottom fund fees. For most people Fidelity wins on usability; for die-hard index investors Vanguard is a classic choice.
Should I use Fidelity or Vanguard?
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Use Fidelity if you want a modern app, fractional shares of any stock, zero-fee index funds, and strong research. Use Vanguard if you mainly want the cheapest index funds for long-term, set-and-forget investing and don't care about a polished interface. Whichever you choose, you can add Walnut's AI layer on top via SnapTrade (where supported) for portfolio analysis and basket-building.
Is Fidelity or Vanguard better for index investing?
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Both are excellent and the costs are nearly identical. Vanguard pioneered low-cost index funds and its ETFs (VOO, VTI) are famously cheap, but Fidelity counters with ZERO funds (FZROX, FNILX) that charge a literal 0.00% expense ratio. For a buy-and-hold index portfolio you cannot go wrong with either; the usual tiebreaker is platform quality, where Fidelity is ahead.
Which has better fractional shares?
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Fidelity, clearly. Fidelity's Stocks by the Slice lets you buy fractional shares of essentially any US stock or ETF down to $1. Vanguard offers fractional investing only for its own ETFs, not for individual stocks. If you want to build small-dollar positions across many individual companies, Fidelity is far more flexible.
Does Fidelity or Vanguard have lower fees?
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It's effectively a tie for most investors, with a slight edge to Fidelity at the very low end thanks to its 0.00% ZERO funds. Vanguard's expense ratios are a few basis points higher on comparable index funds but still among the lowest anywhere. Both charge $0 stock and ETF commissions, so the real-world cost difference for a typical portfolio is tiny.
Which has a better app and platform?
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Fidelity. Its web platform and mobile apps are modern, well-rated, and faster to navigate. Vanguard's interface has historically felt dated and clunky, though it has been improving. If day-to-day usability matters, Fidelity is the more pleasant experience; if you log in twice a year to add to index funds, it matters less.
Which is better for active or frequent trading?
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Fidelity. It offers Active Trader Pro, deeper research, real-time data, and flexible fractional shares. Vanguard is built around buy-and-hold index investing and intentionally does not cater to active traders, its tools are minimal by design. If you trade with any frequency, Fidelity is the better home; for set-and-forget index investing, either works.
Can I transfer between Fidelity and Vanguard?
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Yes. Both support ACATS transfers, so your positions and cost basis carry over and you usually don't have to sell. Transfers typically take 5-7 business days. One caveat: proprietary Vanguard mutual funds may need to be converted or sold when moving to Fidelity (and vice versa for some funds), so check fund compatibility before transferring.
Which is safer, Fidelity or Vanguard?
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Equivalent. Both are SIPC-insured up to $500K (with a $250K cash sub-limit) and both carry additional supplemental insurance. Both are long-established firms managing trillions in assets. Vanguard is famously client-owned, which aligns its incentives, but from an asset-protection standpoint the two are on equal footing.
Can I use Walnut with Fidelity or Vanguard?
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Walnut connects through the regulated SnapTrade integration and adds an AI assistant on top of your existing broker, basket-building, drift analysis, and answers about your live holdings. Fidelity is supported for read-only tracking, so Walnut sees your positions while you trade in Fidelity's apps. Vanguard support via SnapTrade varies; where it's available, Walnut works the same read-only way.