Swisspreneur Show

EP #544 - Stefan Wittwer: Product Obsession and Why Most AI Products Feel Useless

Feb 4, 2026
Stefan Wittwer, founder and CEO of Infinity.swiss and former teenage freelancer turned product-maker, talks product obsession and designing bookkeeping that feels effortless. He discusses user-tested workflows, building compliance-first accounting software, practical AI that makes humans reviewers not operators, and the tradeoffs of product-led growth in a regulated market.
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ANECDOTE

Product Born From Agency Frustration

  • Stefan began Infinity as an agency serving founders and rebuilt bookkeeping after he and peers were frustrated with existing tools.
  • He spent two to three years building a compliant accounting foundation before shipping user-facing features.
INSIGHT

Design For Novices Beats Legacy Interfaces

  • Stefan user-tested incumbent accounting tools by giving new founders bank statements and asking them to book transactions.
  • He discovered most tools failed and designed Infinity so novices can book correctly by hiding complexity.
ADVICE

User-Test With Real UI Early

  • Test complex flows with real software, not just mock-ups, to catch subtle usability issues that matter at scale.
  • Invest early in a reusable design system to iterate quickly while avoiding wasted work.
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