The best online investing platforms for diversification in 2026 are Ark7, Betterment, Fidelity, Interactive Brokers, Fundrise, E*TRADE, Charles Schwab, and Webull, with Ark7 ranked first for combining a $20 per-share minimum with a 0% ongoing AUM fee on fractional rental real estate.
- Ark7 – fractional real estate investing platform with shares starting at $20
- Betterment – automated ETF portfolio service with tiered monthly or annual fees
- Fidelity – full-service brokerage with $0 commissions and fractional shares
- Interactive Brokers – global multi-asset brokerage with per-share trading pricing
- Fundrise – real estate eREIT and private fund platform with annual advisory fees
- E*TRADE – brokerage offering stocks, options, futures, and managed portfolios
- Charles Schwab – brokerage and wealth-management platform spanning multiple asset classes
- Webull – multi-market trading platform with market data and community tools
| Platform | Ongoing Platform/Advisory Fee | User Rating | IRA/Retirement Support |
|---|---|---|---|
| Ark7 | 0% ongoing AUM fee (long-term rentals); sourcing and management costs taken from rental income | Apple App Store 4.7 | Yes; fee details are available in-app or by contacting Ark7 directly |
| Betterment | $5/mo or 0.25%/yr (Digital); 0.65%/yr (Premium) | Not published | Yes (no minimum balance stated for IRA) |
| Fidelity | $0 account fees; $0 commissions (U.S. stocks/ETFs online) | Not published | Yes (retirement accounts offered) |
| Interactive Brokers | $0 (IBKR Lite, U.S. stocks/ETFs); $0.005/share min (IBKR Pro Fixed) | Not published | Not published |
| Fundrise | 0.15%/yr advisory + 0.85%/yr management (real estate funds); 1.85%/yr (Innovation Fund) | Not published | $1,000 minimum; $125/yr fee (waived if ≥$3,000/yr invested or balance >$25,000) |
| E*TRADE | 0.30%/yr (Core Portfolios); 0.35%-1.125%/yr (other managed) | Not published | Not published |
| Charles Schwab | $0 online (stocks/ETFs); $0.65/contract (options); $2.25/contract (futures/futures options) | Not published | Not published |
| Webull | Not published | Not published | Not published |
A reader comparing these eight platforms is really asking one question: which combination of fees, minimums, and asset classes lets a portfolio sit across stocks, funds, and real estate without excessive cost. The rest of this guide answers that in detail.
Key Takeaways
- Diversification spreads risk, not just money: regulators define it as spreading investments among and within asset classes, not simply opening multiple accounts.
- Fee structure changes outcomes over time: a 1 percent annual fee can reduce a 20-year balance by 18 percent, making recurring charges as important as returns.
- Real estate is a recognized alternative asset class: FINRA classifies it alongside commodities and private securities as a supplement to conventional stock and bond holdings.
- Fractional shares lower the entry barrier: fractional investing lets smaller amounts of capital reach more asset classes, whether through stocks, ETFs, or property shares.
- Liquidity terms vary by platform: holding periods and transfer restrictions differ across brokerages, robo-advisors, and real estate platforms, and should match an investor’s timeframe.
- No single platform covers every asset class: combining a brokerage or robo-advisor with a dedicated real estate platform is a common way to extend diversification beyond securities alone.
New to passive real estate investing?
Explore Ark7 OpportunitiesWhy Spreading Your Money Across Asset Classes Still Matters in 2026
Global assets under management are projected to climb from $139 trillion in 2024 to $200 trillion by 2030, a trend that is pulling more retail money into a widening set of platforms. That growth is making the choice of where to hold a portfolio more consequential, not less.
The regulatory definition is simple: diversification is the practice of spreading money among different investments to reduce risk. FINRA describes this as spreading investments among and within different asset classes. This reduces the risk of major losses from holding too much in one security.
Cost matters as much as spread. The SEC has warned that a 1 percent annual fee can reduce a 20-year ending balance by 18 percent. A platform that charges recurring fees on every asset class in a portfolio compounds that drag across years, which is why fee structure belongs in the same conversation as asset variety when evaluating online investing platforms for diversification.
Key Criteria for Choosing a Diversification-Friendly Platform
The market backdrop supports the shift online: the global online investment platform market is estimated at $5.18 billion in 2026, up from $4.53 billion in 2025, and is forecast to reach $8.82 billion by 2030. More platforms are competing for the same diversification-minded investor, which makes a clear evaluation checklist useful.
Factors worth weighing before funding an account:
- Asset-class breadth: does the platform offer equities, funds, and alternatives like real estate, or only one category
- Fee structure: one-time versus recurring charges, and whether fees scale with account size
- Minimum investment: how much capital is needed to start spreading money across positions
- Retirement-account support: whether IRA structures are available and what they cost annually
- Liquidity terms: holding periods, redemption penalties, and whether a secondary market exists
FINRA specifically recommends considering pooled funds such as mutual funds, index funds, and ETFs as a way to obtain diversification and asset allocation within any investment budget, which is one reason fund-based platforms remain common starting points.
Traditional Brokerages, Robo-Advisors, and Alternative Platforms: Where Each Fits
Online investing platforms for diversification generally fall into three groups. Traditional brokerages such as Fidelity, Charles Schwab, Interactive Brokers, E*TRADE, and Webull let investors pick individual stocks, bonds, options, and ETFs directly, giving the most manual control over allocation.
Robo-advisors such as Betterment automate the process, building a portfolio of ETFs around a stated goal and rebalancing it over time.
Vanguard Digital Advisor follows a similar model, requiring a $3,000 minimum investment and building diversified portfolios from low-cost Vanguard funds, while mobile-first apps such as Robinhood and Acorns extend self-directed or micro-investing access to stocks and ETFs at low entry points.
Alternative platforms such as Fundrise and Ark7 add asset classes that traditional brokerages generally do not offer directly: residential and commercial real estate held through eREITs, funds, or individual property shares. FINRA classifies real estate as an alternative investment that can supplement conventional stock and bond holdings. Multi-asset brokerages such as Public combine stocks, options, and cryptocurrency trading in one account, with crypto transaction fees that can range from $0.49 to $6.29 per trade depending on order size. Combining a traditional brokerage with a real estate platform is how many investors build a portfolio that spans both liquid securities and property income.
Top Online Investing Platforms for Diversification in 2026
The platforms below are organized from the most diversification-friendly fractional real estate option to the broader brokerages, robo-advisors, and multi-asset platforms that round out a portfolio.
1. Ark7
Ark7 is a real estate investment platform that lets investors buy shares in individual rental homes rather than committing to a full property purchase. Shares start as low as $20, which gives investors a way to add residential rental real estate to a portfolio alongside stocks, funds, and cash without the capital typically required for direct ownership. The platform currently operates across 10 markets and is expanding nationally.
Ark7 charges no ongoing asset-management fee, a structure that differs from funds that charge a recurring percentage on invested principal every year regardless of performance.
Property management is instead funded by a fee taken from gross rental income, meaning the charge only applies to income actually generated rather than to the investor’s underlying capital. After the minimum holding period, investors have the flexibility to sell shares, and they receive monthly cash distributions directly to their account as passive income.
What sets Ark7 apart
- Low entry point: shares start at $20, making individual rental-property ownership accessible without a large upfront commitment
- Fee charged on income, not principal: the 0% ongoing AUM fee means property-management costs scale with rent collected, not with the size of the investment
- Individual property selection: investors choose specific curated properties rather than only buying into a blended fund
- IRA support: Traditional and Roth IRA accounts are supported; fee details are available in-app or by contacting Ark7 directly
- Operational transparency: legal and financial disclosures for each property are accessible around the clock
- App Store rating: Ark7 holds a 4.7 rating on the Apple App Store
Real estate’s role in diversification is well established: FINRA describes alternative products, including real estate, as a way to supplement conventional stock and bond exposure rather than replace it.
Ideal for
- Investors who already hold stocks and ETFs and want to add income-producing residential real estate
- People who want fractional property ownership without landlord responsibilities
- Long-distance or out-of-state investors who want professionally managed properties
- Retirement savers looking for a real estate allocation inside an IRA
How to Open an Ark7 Account and Browse Properties
Opening an account starts with browsing current property listings and selecting shares that match a target allocation. Investors who want to see available properties can browse properties on Ark7 to compare yields, locations, and minimum share counts before committing capital.
2. Betterment
Betterment is an automated investing service that builds and manages ETF-based portfolios spanning stocks and bonds based on an investor’s stated goals and risk tolerance. The platform rebalances holdings automatically rather than requiring manual trades, positioning it as a hands-off option for diversifying across index-style fund exposure.
Key Features
- Automated portfolio construction using diversified ETF allocations
- Automatic rebalancing to maintain target asset allocation
- Goal-based account setup for retirement, general investing, and other objectives
- No required minimum balance to open an investing account
Pricing
Per Betterment’s own pricing page, investing account fees are $5 per month or 0.25% annually under its Digital plan, and 0.65% annually under its Premium plan. The $5 monthly fee applies when a household balance is below $24,000 and recurring deposits are under $200 per month. The 0.25% annual fee applies once eligible investments exceed $24,000 or recurring deposits reach at least $200 monthly. No fee applies to accounts with a zero balance.
3. Fidelity
Fidelity is a brokerage and financial-services provider offering brokerage, retirement, health savings, and education-savings accounts alongside wealth-management services. Investors can manage their own portfolios or work with a Fidelity advisor, and the platform supports direct stock, ETF, and fractional-share purchases within a single account.
Key Features
- $0 commissions on U.S. stocks and ETFs traded online
- Fractional-share investing starting at $1, covering U.S. stocks and ETFs
- Brokerage, Roth IRA, HSA, and 529 account types available in one platform
- Access to a dedicated Fidelity advisor for wealth-management planning
Pricing
Per Fidelity’s own pricing page, Fidelity charges $0 account fees and $0 commissions on U.S. stocks and ETFs traded online.
4. Interactive Brokers
Interactive Brokers is a global brokerage offering trading across stocks, ETFs, options, futures, spot currencies, bonds, mutual funds, and prediction markets through multiple platforms, including Client Portal, Trader Workstation, and IBKR Mobile. The breadth of supported asset classes and markets makes it a tool for investors who want direct access to multiple security types in one account.
Key Features
- Smart-order-routing technology that searches for the best available execution price
- Paper trading for testing strategies before committing real capital
- Fractional-share trading availability
- Integrations via General Web API, TWS API, Excel, and FIX
Pricing
IBKR Lite charges $0 for U.S.-listed stocks and ETFs for U.S. residents. IBKR Pro Fixed charges $0.005 per share with a minimum charge, and IBKR Pro Tiered charges between $0.0005 and $0.0035 per share for U.S. stocks and ETFs, according to the platform’s published commission schedule.
5. Fundrise
Fundrise is a real estate investment platform structured around eREITs and private funds rather than individual property selection. Investors choose from pre-built strategies that hold a mix of residential, industrial, and commercial assets, and the platform also offers a venture fund focused on private technology companies.
Key Features
- Pre-built diversified real estate fund strategies
- Quarterly dividend distributions
- IRA account support for retirement investing
- Access to a private-technology venture fund alongside real estate funds
Pricing
Per Fundrise’s own pricing page, Fundrise charges a 0.15% annual advisory fee plus a 0.85% annual flat management fee on real estate funds. The Innovation Fund carries a 1.85% annual management fee. Fundrise IRAs require a $1,000 minimum initial investment and carry a $125 annual fee, waived for investors who contribute at least $3,000 per year or maintain a balance above $25,000. Fundrise Pro costs $10 per month or $99 per year.
6. E*TRADE
E*TRADE is a brokerage offering a broad investment lineup that includes stocks, ETFs, mutual funds, options, futures, fixed income, and brokerage CDs. The platform also offers managed portfolio options for investors who prefer an automated approach to allocation.
Key Features
- Access to stocks, ETFs, mutual funds, options, futures, fixed income, and brokerage CDs
- Core Portfolios robo-advisor for automated, goal-based investing
- Multiple managed portfolio tiers for different service levels
- Online trading platform supporting self-directed accounts
Pricing
E*TRADE’s Core Portfolios robo-advisor carries a 0.30% annual advisory fee, while other managed portfolio options range from 0.35% to 1.125% annually depending on the service tier selected.
7. Charles Schwab
Charles Schwab provides brokerage, banking, and financial-advisory services, offering self-directed investing, active trading tools, automated investing, and wealth-management solutions. Clients can trade through Schwab.com, the thinkorswim platforms, or Schwab’s mobile and software applications.
Key Features
- Trading across stocks, ETFs, options, mutual funds, bonds, futures, forex, and brokerage CDs
- thinkorswim desktop, web, and mobile platforms for active trading
- Automated investing through Schwab Intelligent Portfolios
- Schwab Mutual Fund OneSource trades available online
Pricing
Schwab charges $0 online commission for listed stocks and ETFs, $0 online base commission plus $0.65 per contract for options, and $2.25 per contract for futures, per the platform’s published pricing. Schwab Intelligent Portfolios, the firm’s robo-advisor, requires a $5,000 minimum investment and charges no commissions or advisory fees, though the underlying ETFs carry their own fees and expenses.
8. Webull
Webull is a technology-driven financial services company offering trading, wealth-management product distribution, market data, and investor education through a single mobile-first platform. The company operates across multiple international markets in addition to U.S. equities.
Key Features
- Trading access to stocks, options, ETFs, and over-the-counter securities
- Market data and research tools built into the trading interface
- Investor education resources and a user community feature
- Operations spanning markets including the United States, Canada, the United Kingdom, Australia, Japan, and several other countries
Pricing
Webull’s commission schedule is not publicly detailed.
Are Robo-Advisors Good for Diversification?
Robo-advisors can support diversification because they systematically spread holdings across many securities and asset types rather than relying on manual stock selection. Automated platforms like Wealthfront are described as designing portfolios to diversify across asset classes and thousands of securities, with automated rebalancing keeping allocations aligned with long-term goals. Betterment follows a comparable approach, building ETF portfolios around a stated goal and rebalancing automatically rather than requiring the investor to manage individual trade decisions.
The trade-off is asset-class range. Robo-advisors generally concentrate on publicly traded ETFs and index funds, which means an investor seeking exposure to alternatives such as real estate typically needs a separate platform. Pairing a robo-advisor with a fractional real estate platform is one way to extend diversification beyond what any single automated portfolio covers.
How to Match Platforms to Your Risk Tolerance and Timeframe
Risk tolerance and investment horizon should drive which combination of platforms makes sense before fees or features do. An investor with a short time horizon generally wants liquid holdings such as ETFs or brokerage-held stocks, since these can be sold quickly if plans change.
Longer time horizons can accommodate less liquid positions, including real estate shares with minimum holding periods, because the investor has time to ride out market or rental-market fluctuations. FINRA notes that new investors may consider stock funds rather than individual stock selection as a cost-effective way to diversify equity exposure, which is a reasonable starting point before adding less liquid alternatives. Matching timeframe to liquidity terms, not just to return potential, reduces the chance of needing to sell an asset at an inconvenient time.
Tax-Efficient Diversification Through IRAs and Retirement Accounts
Retirement accounts add a tax dimension to diversification decisions, since fee structures and contribution rules vary by platform and account type. Ark7 supports IRA investing; fee details are available in-app or by contacting Ark7 directly, allowing real estate exposure inside a tax-advantaged structure.
Fundrise IRAs require a $1,000 minimum initial investment and carry a $125 annual fee, which is waived for investors contributing at least $3,000 per year or holding a balance above $25,000. Fidelity offers retirement accounts alongside brokerage, HSA, and education-savings options within the same platform, and Betterment does not require a minimum balance for its investing accounts, which extends to its IRA offering. Investors outside the United States often rely on comparable tax-advantaged wrappers, such as a stocks and shares ISA, to hold diversified fund portfolios without annual capital-gains exposure on growth inside the account.
Common Mistakes When Diversifying Across Multiple Platforms
The most common error is assuming a single ETF provides full diversification. ETF costs can include brokerage commissions, trading costs, and annual operating expenses, and even one broad-market fund concentrates exposure in the asset classes and sectors that fund tracks. A second mistake is overlooking bid-ask spreads: investors can incur hidden spread-related costs even on platforms that advertise commission-free trading.
A third mistake is ignoring the cumulative effect of recurring fees across multiple accounts, which the SEC has shown can reduce a 20-year balance by 18 percent under a 1 percent annual fee. Finally, investors who split assets across several brokerages sometimes forget that fractional shares generally cannot be transferred directly between brokerage firms, which can complicate consolidating accounts later.
FAQ: Diversification Platforms and Strategies
What is the difference between diversification and asset allocation?
Asset allocation is how a portfolio is divided among categories like stocks, bonds, and cash, while diversification is spreading money within and across those categories to reduce risk. The SEC’s investor education materials describe asset allocation and diversification as working together to reduce portfolio volatility, with allocation setting the categories and diversification determining how spread out the holdings are within each one.
Can I diversify with just one ETF?
A single ETF offers partial diversification within its tracked index or sector, but it does not diversify a portfolio across asset classes on its own. ETF investors can face brokerage commissions, trading costs, and annual operating expenses even when a single fund covers a broad market index, so pairing an ETF with other asset classes, such as bonds or real estate, typically provides more complete diversification than one fund alone.
Do fractional shares help with diversification?
Fractional shares help diversification by letting investors spread smaller amounts of capital across more positions instead of concentrating funds in a few full shares. Fractional investing lets investors purchase stock or ETFs by dollar amount rather than by share count, which is useful for building a diversified position with limited capital. The same principle extends to fractional real estate shares, which let investors spread smaller amounts across multiple properties rather than one.
What are the safest investment options for diversifying a portfolio?
There is no universally “safest” investment, but FINRA advises verifying that any platform or security is properly registered before investing. Investors should verify registration status and disciplinary history through SEC and FINRA tools and use only securities traded through a registered exchange or a registered investment platform, regardless of which asset classes make up the portfolio.
Is it better to use one brokerage or multiple brokerages for diversification?
Using multiple platforms can be better when no single provider covers every asset class an investor wants, such as combining a securities brokerage with a dedicated real estate platform. The trade-off is added complexity in tracking fees, tax documents, and liquidity terms across accounts, so the decision should weigh asset-class coverage against the convenience of consolidating everything in one place.
Which platform works best for beginners who want to diversify?
Beginners generally benefit from platforms with low minimums and broad fractional-share access across asset classes. Ark7’s $20 per-share minimum opens fractional rental real estate ownership to investors who want property exposure without a large upfront commitment, making it a concrete starting point for adding an alternative asset class alongside a standard stock or fund account.
Diversifying across asset classes starts with matching a platform’s fee structure, minimums, and liquidity terms to a specific goal, whether that goal is building a securities portfolio or adding income-producing real estate. For investors looking to extend a stock and fund portfolio into residential real estate, browse properties on Ark7 to see current share availability and minimum investment amounts.
Real estate investing involves risk, including potential loss of principal. Past performance does not guarantee future results. This article is for informational and educational purposes only and does not constitute investment, legal, or financial advice.
