A Product Market Fit Show | Startup Podcast for Founders She raised $20M from Accel to replace QuickBooks with AI. | Helen Hastings, Founder of Quanta
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Mar 19, 2026 Helen Hastings, founder and CEO of Quanta who raised seed and Series A funding including from Accel, built an AI-enabled accounting service to replace legacy tools like QuickBooks. She discusses running 200 user interviews, why starting as an AI-enabled service beats pure SaaS, rebuilding the ledger from scratch, the pitfalls of saying yes to too many customers, and the moment PMF forced a growth pause.
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Use AI To Accelerate But Engineers Must Architect
- Don't underestimate engineering effort: rebuilding a ledger is hard and requires architects, not just AI coding tools.
- Use AI to accelerate but rely on engineers to design robust, accurate, scalable financial architecture.
Engineers As Bookkeepers Exposed Edge Cases
- Early engineers acted as bookkeepers to learn edge cases; engineers manually reviewed transactions and Slack-pinged when code couldn't handle a case.
- This hands-on approach taught domain nuance and guided what automation to build next.
Service Promise Forces Deep Domain Mastery
- AI-enabled services must commit to handling all accounting edge cases because customers expect the provider to be on the hook.
- That obligation forces the company to learn global payroll, refunds, local benefits and expand automation coverage.