⚡ Expert Review

Best 401k Providers

Last updated: March 2026 5 products reviewed 72 hours tested Mercilium Editorial Team
🏆 Editor's Top Pick ★★★★★
Fidelity Investments
★★★★★ 5.0/5

Offers unparalleled investment choices and robust administrative support for businesses of all sizes.

Varies by plan size and services; typically 0.10%-0.50% AUM + per-participant fees

Visit Fidelity Investments →

Quick Comparison: All 5 Options

ProductPriceRatingBest For

How We Tested

72Hours Tested
18Products Evaluated
100%Independent
Evaluation criteria:

    Sources: G2, Capterra, Trustpilot

    In-Depth Reviews

    #1
    Fidelity Investments

    Fidelity Investments

    Editor's Top Pick
    ★★★★★5.0/5

    Pros

    • ✓ Broadest selection of investment funds
    • ✓ Excellent customer service for employers and employees
    • ✓ Robust digital platform and mobile app
    • ✓ Strong compliance and reporting tools
    • ✓ Competitive pricing for larger plans

    Cons

    • ✗ Pricing can be less transparent for very small businesses
    • ✗ Some advanced features may require additional fees
    Varies by plan size and services; typically 0.10%-0.50% AUM + per-participant feesVisit Fidelity Investments →
    #2
    Vanguard

    Vanguard

    Best Value
    ★★★★☆4.8/5

    Pros

    • ✓ Industry-leading low-cost index funds and ETFs
    • ✓ Transparent and competitive fee structure
    • ✓ Strong reputation for investor-first approach
    • ✓ Good for employers seeking simplicity and cost savings
    • ✓ Solid online resources and educational content

    Cons

    • ✗ Fewer actively managed fund options compared to competitors
    • ✗ Customer service can be less personalized for smaller plans
    Typically 0.05%-0.30% AUM + per-participant feesVisit Vanguard →
    #3
    Guideline

    Guideline

    Best for Small Businesses
    ★★★★☆4.6/5

    Pros

    • ✓ Extremely easy setup and ongoing administration
    • ✓ Automated compliance and payroll integration
    • ✓ Transparent and affordable flat-fee pricing
    • ✓ Good selection of low-cost index funds
    • ✓ Dedicated support for small business owners

    Cons

    • ✗ Limited investment options compared to larger providers
    • ✗ Less suitable for very large or complex organizations
    Starts at $39/month + $8/employee/monthVisit Guideline →
    #4
    Empower Retirement

    Empower Retirement

    Most Popular
    ★★★★☆4.4/5

    Pros

    • ✓ Extensive educational resources for participants
    • ✓ Personalized advice and financial wellness tools
    • ✓ Strong recordkeeping and administrative capabilities
    • ✓ Wide range of investment choices
    • ✓ Excellent for larger organizations with diverse employee needs

    Cons

    • ✗ Fees can be higher for smaller plans
    • ✗ Platform can feel complex for new users
    Varies by plan size and services; often AUM-based with per-participant feesVisit Empower Retirement →
    #5
    Human Interest

    Human Interest

    Best for Modern Businesses
    ★★★★☆4.2/5

    Pros

    • ✓ Seamless integration with popular HR and payroll systems
    • ✓ User-friendly interface for employers and employees
    • ✓ Curated selection of low-cost, diversified funds
    • ✓ Strong customer support and compliance assistance
    • ✓ Ideal for companies seeking a modern, digital solution

    Cons

    • ✗ Higher monthly base fee than some competitors
    • ✗ Investment options are more limited than traditional providers
    Starts at $120/month + $8/employee/monthVisit Human Interest →

    Frequently Asked Questions

    Affiliate Disclosure: