How fixing 401(k) the hard way led Guideline's founder to a major exit

• SMB 401(k) market was completely ignored by Fidelity et al. — too few assets.
  • TaskRabbit: 36% enrollment, $20K/yr cost, no payroll integration despite same provider.
  • Incumbents layered opaque asset-based fees across record keeper, TPA, fund manager.
• Guideline built the entire stack bottom-up to eliminate AUM fees entirely.
  • Outsourcing to legacy rails = perpetuating the fee problem; no shortcut.
  • Launched at 0% AUM — “very difficult” but seed-funded and pre-profit.
• Plaid (Zachary Perret) was customer #1; early plans run manually, then productized.
  • “Plaid problem” forced IRS 5500 filing and compliance tooling in year one.
• Auto-enrollment was non-negotiable from day one — lost 5–10 of first 100 plans over it.
  • Secure 2.0 Act (2022) mandated it nationally — Guideline was 6 years early.
• Gusto integration was the unlock: 92% of 60K customers on integrated payroll, 400-person team.
  • Outbound sales failed (~60% self-serve); product-led growth plus Gusto partnership replaced it.
  • $175M ARR, profitable 18 months before acquisition talks turned serious.
• Acquisition by Gusto was “daunting” — regulated entities (RIA + record keeper) required splitting the business in two.
  • No banker, no blueprint; closed on decade of trust with Gusto’s Josh and Tomer.
  • Lesson: complex deals live or die on pre-existing relationships and specialist counsel.

Kevin Busque (Guideline founder, ex-TaskRabbit co-founder/CTO), via First Round Review · 2026-03-24 · Read on review.firstround.com