10 Best Guideline 401(k) Alternatives & Competitors (2026)

ADP is a full-service payroll and HR provider serving businesses of all sizes with robust compliance tools and global capabilities. It offers deeper enterprise features than Gusto but can feel more complex and expensive for small teams. Many users switch to Gusto for simpler pricing and faster setup while ADP remains stronger for large organizations needing advanced workforce management and dedicated account management.

Human Interest delivers a flat-fee 401(k) platform aimed at startups and SMBs with automated administration, 3(16) and 3(38) fiduciary services, and payroll integrations. Its pricing is transparent and competitive with OctaveWealth, though some plans carry slightly higher base fees; it excels in modern employee dashboards but may offer fewer live education sessions.

Human Interest delivers a flat-fee 401(k) platform aimed at startups and SMBs with automated administration, 3(16) and 3(38) fiduciary services, and payroll integrations. Its pricing is transparent and competitive with OctaveWealth, though some plans carry slightly higher base fees; it excels in modern employee dashboards but may offer fewer live education sessions.

Betterment for Business provides robo-managed 401(k)s with low-cost index portfolios, automated compliance, and fiduciary oversight. It matches OctaveWealth’s emphasis on low fees and personalized projections yet typically charges a percentage of assets rather than a strict per-employee flat fee, suiting growing companies that prefer AUM pricing.

Vanguard offers low-cost index funds and strong record-keeping for 401(k) plans but often requires more plan sponsor involvement in administration compared with OctaveWealth’s full-service 3(16) and dedicated manager model. Its asset-based fees can exceed OctaveWealth’s flat structure for smaller plans.

Fidelity provides robust 401(k) administration, wide investment choices, and payroll integrations. While it offers strong education resources, its fee model frequently includes revenue sharing or higher participant costs, differing from OctaveWealth’s no-revenue-sharing and zero extra employee fee approach.

ForUsAll targets small businesses with low-cost 401(k)s, 3(38) fiduciary management, and automated enrollment. Its pricing is competitive with OctaveWealth’s flat model, though the platform’s education features and dedicated support may be less comprehensive for companies needing concierge onboarding.

TriNet combines 401(k) services with PEO benefits and payroll, delivering bundled compliance and education. Its scale advantages come with higher fees and less transparent pricing compared with OctaveWealth’s clear flat-fee structure.

Ubiquity offers affordable 401(k) plans with automated administration and low-cost funds. It provides solid compliance tools but lacks the same level of personalized employee projections and live annual education sessions that OctaveWealth emphasizes.